Icom IC-726 Instruction Manual
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INSTRUCTION MANUAL HF/50 MHz ALL MODE TRANSCEIVER IC—726 | m Inc. Downloaded by co e RadioAmateur.EU CAUTIONS (1) Before using the 1C-726, read all instructions carefully and completely. (2) SAVE THIS INSTRUCTION MANUAL — This instruc- tion manual contains important safety and operating instructions for the 1C-726. (3) NEVER connect the DC power cable to an AC outlet. This will ruin the transceiver. (4) NEVER apply more than 16 V DC to the DC POWER SOCKET on the transceiver rear panel. Check the power source voltage before connecting the power cable. (5) NEVER allow children to touch the transceiver during operation. (6) NEVER expose the transceiver to rain, snow or any liquid. (7) AVOID using or storing the transceiver in temperatures below —10°C (+14°F) or over +60°C (+140°F). OPERATING CAUTIONS (1) In any mobile operation, DO NOT operate the trans- ceiver without running the vehicle’s engine. The vehicle’s battery will quickly run out if the transceiver power is ON while your vehicle’s engine is OFF. (2) In maritime mobile operation, keep interconnection cables as far away as possible from electronic instru- ments to prevent instrument malfunctions. (3) BE CAREFUL! If the transceiver is not securely mounted with bolts and nuts, personal injury or transceiver damage could occur due to braking, wave shock, vibrations, etc. (4) AVOID using the transceiver in excessively dusty environments. (5) AVOID placing the transceiver in direct sunlight. (6) BE CAREFUL! The heatsink may become hot when operating the transceiver continuously for long periods. (7) Transmitting without an antenna may damage the transceiver. INTRODUCTION Icom's new IC-726 HF/50 MHz ALL MODE TRANS- CEIVER is designed to meet the increasing demand of today’s amateur radio users for transceivers with fewer controls and switches, especially for hands-free mobile operation from HF through 50 MHz bands. The 1C-726 has the following advanced features: @icom DDS (Direct Digital Synthesizer) 026 user-programmable memory channels 03 scan types OSelectable tuning rate in 10, 20 or 50 Hz steps Band stacking register capability e10 dB preamplifier 20 dB attenuator To thoroughly understand the capabilities of your new |IC-726, please read this manual carefully before attempting operation. If you have any questions regarding the opera- tion of the 1C-726, feel free to contact your nearest authorized Icom Delaer or Service Center. UNPACKING Accessories included with the IC-726: Oty. M DC power cable (OPC-025A} ................... 1 @ Hand microphone (HM-12) .................... 1 Spare fuse (20 A)..................,........ 1 &) Spare fuse (4 A)......................... -.. 1 & Screws B1 4x 12 CR (for optional MB-23 installation) .... 2 © Screws CO 3 x 6 (for optional MB-23 installation) ....... 4 DO Jumper wire. . ............ ee... 1 for free by RadioAmateur.eu TABLE OF CONTENTS CAUTIONS........................ » OPERATING CAUTIONS............. INTRODUCTION.................... *, UNPACKING ................ uses TABLE OF CONTENTS.............. 1. CONTROL FUNCTIONS............ 1-4 1-1 FRONT PANEL.................. 1 1-2 REAR PANEL...............200- 3 1-3 MICROPHONE (HM-12)............ 3 1-4 FUNCTION DISPLAY ............. 4 2. INSTALLATION .................. b — 6 2-1 UNPACKING............. o... ... 5 2-2 MOUNTING THE TRANSCEIVER..... 5 2-3 ANTENNA .............0000e eee 5 2-4 GROUNDING ................... 5 2-5 WIRING THE DC POWER CABLE.... 5 2-6 REAR PANEL CONNECTIONS....... 6 3. SYSTEM INTERCONNECTIONS ....7~ 12 3-1 POWER SUPPLY CONNECTIONS..... 7 3-2 LINEAR AMPLIFIER CONNECTIONS... 8 3-3 ANTENNA TUNER CONNECTIONS... 9 3-4 AH-3 OPERATING PROCEDURES .... 10 3-5 AFSK TERMINAL UNIT CONNECTION................... 10 3 - MIC CONNECTOR INFORMATION. ... 10 3-7 АСС SOCKET INFORMATION. ...... 11 3-8 REMOTE JACK (CI-V) INFORMATION. ................. 12 4. PRE-OPERATION ............... 13 ~ 16 4-1 INITIAL SETTINGS............... 13 4-2 FREQUENCY SELECTION.......... 13 4-3 VFO A AND VFO B SELECTION.... 14 4-4 RECEIVER CONTROLS AND SWITCHES ................. 15 4-5 TRANSMITTER CONTROLS AND SWITCH................... 16 5. BASIC OPERATION ............. 17 = 21 5-1 SSB OPERATION ................ 17 5-2 CW OPERATION................. 18 5-3 AM OPERATION................. 19 5-4 FM OPERATION................. 20 5-5 RIT/Af FUNCTION............... 21 5-6 SPLIT OPERATION............... 21 6. 10. 11. 12. 13. MEMORY CHANNEL OPERATION .... 22 6-1 VFO AND MEMORY MODE SELECTION .................... 22 6-2 MEMORY CHANNEL SELECTION .... 22 6-3 MEMORY WRITING .............. 22 6-4 FREQUENCY TRANSFERRING [MB VFOI..................... 22 SCANNING OPERATION............. 23 7-1 SCAN TYPES................... 23 7-2 PROGRAMMED SCAN............. 23 7-3 MEMORY SCAN ................. 23 7-4 SELECTED MODE MEMORY SCAN... 23 7-5 SUPPLEMENTAL SCAN SETTINGS ... 23 MAINTENANCE AND ADJUSTMENT.................. 24 ~ 28 8-1 DISASSEMBLING THE TRANSCEIVER.................. 24 8-2 FUSE REPLACEMENT............. 25 8-3 CPU RESETTING ................ 25 8-4 CPU BACKUP BATTERY........... 25 8-5 CLEANING..................... 25 8-6 TROUBLESHOOTING.............. 26 -7 ADJUSTMENTS.................. 27 INSTALLATION OF OPTIONS .... 29 - 30 9-1 UT-30 PROGRAMMABLE TONE ENCODER UNIT................. 29 9-2 СМ МААНОМ FILTERS............ 29 9-3 MB-23 CARRYING HANDLE........ 29 9-4 CR-64 HIGH-STABILITY CRYSTAL UNIT ......................... 30 INSIDE VIEWS ................. 31 — 32 10-1 MAIN UNIT .................... 31 10-2 PEL UNIT...................... 32 BLOCK DIAGRAM .................. 33 SPECIFICATIONS ..............,..... 34 OPTIONS ...................... 35 ~ 36 SCHEMATIC DIAGRAM....... SEPARATE Tech Talk from Icom e What is the function of the band stacking for free by RadioAmateur.eu A ‘CONTROL FUNCTIONS 1-1 FRONT PANEL ee | POWER | GD ° | x ı 3 5 3 +20d8 5 > 10 ae TUNE ba ! TRANSMIT Lil rx ar OUTPUT - ГГ. => | O ICOM AF ©- SQL MIC -©- RF PwR IL_SSB AF -@ SQL MIC -O- RF PWR ? i Ye “TS ale gh N PHONES | @ @5) == (D RECEIVE INDICATOR Indicates that the squelch is open. @ TRANSMIT/ALC INDICATOR (p. 16) Lights when the transceiver is transmitting. (3) METER | Shows the strength of a received signal and relative output power while transmitting. @ VFO SWITCH [VFO] (pgs. 14, 22) Selects VFO A or VFO B for tuning purposes. 6) SPLIT SWITCH [SPLIT] (p. 21) Selects split operation. © MEMORY CHANNEL UP/DOWN SWITCHES [UP] [DOWN] (p. 22) Changes memory channels. 7 MEMORY WRITE SWITCH [MW] (р. 22) Stores the displayed frequency and mode into the displayed memory channel. MEMORY READ SWITCH [MEMO] (p. 22) Selects MEMORY CHANNEL mode. | @ RIT SWITCH [RIT] (pgs. 15, 21) Turns ON and OFF the RIT circuit. RIT CONTROL (pgs. 15, 21) Shifts the receive frequency when the RIT function is ON. () FUNCTION SWITCH [FUNC] Activates the secondary switch functions. SWITCH [FUNC] + [VFO] Activates programmed scan. (p. 23) [FUNC] + [SPLIT] Equalizes the frequency and mode of operation of the two VFOs. [FUNC] + [MEMO] Activates memory scan. (p. 23) [FUNC] + [MW] Activates the frequency transfer function. (p. 22) [FUNC] + (RIT] Adds the RIT shift frequency to the displayed frequency. (p. 21) [FUNC] + [TUNER] Bypasses the AH-3 HF AUTO- MATIC ANTENNA TUNER (optional). (p. 10) [FUNC] + [kHz] Changes the tuning step. (p. 14) [FUNC] + [BAND] Turns ON and OFF the 10 Hz digit on the frequency display. (p. 14) [FUNC] +[LOCK] Activates the mode selected me- +[MEMO] mory scan. (p. 23) [FUNC] +[AM/FM] Turns ON and OFF the auto tuning step function. (p. 14) (optional). (2 ANTENNA TUNER SWITCH [TUNER] (p. 10) Tunes the AH-3 AUTOMATIC ANTENNA TUNER for free by RadioAmateur.eu © See Section 1 - 4 FUNCTION DISPLAY т I AA “7 = a u am, u a. “un, | VFO | SPLIT | UP MEMO [P.SCAN) | А=В | 1 AL . > M-CH sp.it LL II (MScan) [M-VFO]) au u — u, “= г ||| memo | MW | DOWN CONTROL FUNCTIONS 1 @ ©) = te IP.SCAN| | A=B | M-CH — (6) [M.SCAN] [ M-VFO | [| Memo | Mw | DOWN — o) Н IL 9 4 (y Q 4 © @ BAND SWITCH [BAND] (р. 13) Allows the MAIN DIAL to select bands only. (9 DIAL LOCK SWITCH [LOCK] Deactivates the MAIN DIAL and transmits a subaudible tone signal in FM mode. 45 MHz TUNING RATE SWITCH [MHz] (p. 14) Sets the tuning steps at 1 MHz. kHz TUNING RATE SWITCH [kHz] (p. 14) Sets the tuning rate for 1 kHz steps. (1) MAIN DIAL Changes the displayed frequency. (9 BRAKE ADJUSTMENT SCREW (p. 27) Adjusts MAIN DIAL tension. MODE SWITCHES (pgs. 17 ~ 20) Selects the desired operating mode. 20) AGC SWITCH [AGC] (p. 15) Changes the time constant of the AGC circuit. 2) PREAMP SWITCH [PRE] (p. 15) Activates the built-in 10 dB gain RF preamplifier. @) ATTENUATOR SWITCH [ATT] (p. 15) Activates the 20 dB attenuator. RIT D . i O BAND I C= O Y Lock TUNER Ç(FUNC) <= ZA _ | rw [oe == - @) NOISE BLANKER SWITCH [NB] (p. 15) Activates the noise blanker circuit. MIC CONNECTOR [MIC] (p. 10) Accepts Icom hand or desk microphones. Section 13 OPTIONS. Refer to @) RF POWER CONTROL [RF PWR] (p. 16) Adjusts RF output power. @6) MIC GAIN CONTROL [MIC] (p. 16) Adjusts microphone input gain. @ SQUELCH CONTROL [SQL] (p. 15) Adjusts the squelch threshold level. AF GAIN CONTROL [AF] (p. 15) Adjusts audio output level. @3) HEADPHONES JACK [PHONE] Accepts a standard 1/4 inch plug from 4 ~ 16 2 mono or stereo headphones. 6) TRANSMIT/RECEIVE SWITCH [TRANSMIT] Selects transmit or receive. GD POWER SWITCH [POWER] Turns the power ON and OFF. for free by RadioAmateur.eu { CONTROL FUNCTIONS 1-2 REAR PANEL HF OO a le O] EQ om ANT SOM © © © © (43) 6) tcom Inc were ann SERIAL NO ® м O REMOTE [$ TUNER © 6355 © EXT SP BK IN-DELAY KEY ACC(2) ACCIÓN ALC SEND DC 138V ri ri г a D T9 O @ © OG B09 Ys G2 ANTENNA CONNECTORS (pgs. 5, 6) Connect a 50 {2 antenna with a PL-259 plug to each connector. 8) CI-V REMOTE CONTROL JACK (р. 12) Designed for use with a personal computer for remote operation of transceiver functions. 89 DC POWER SOCKET (р.7) Accepts 13.8 V DC using the supplied DC cable. @ TUNER CONTROL SOCKET (p. 9) Accepts the optional AH-3 HF AUTOMATIC ANTEN- NA TUNER control cable. SEND CONTROL JACK (p. 8) Goes to ground when transmitting. SD ALC INPUT JACK (p. 8) Connects to the ALC output jack of a non-icom linear amplifier. 1-3 MICROPHONE (HM-12) Treo 89 ACCESSORY SOCKETS (p. 11) Input and output connections for external equipment. CW KEY JACK (pgs. 6, 18) Accepts a straight key or electronic keyer with a stan- dard 1/4 inch 3-conductor plug. 4) CW BREAK-IN DELAY CONTROL (р. 18) Adjusts the transmit-to-receive switching delay time for CW semi break-in operation. @ СМ SEMI BREAK-IN SWITCH (р. 18) Turns ON and OFF the CW semi break-in operation. @ EXTERNAL SPEAKER JACK (p. 6) Connect a 4 ~ 16 {2 speaker here, if required. 43 GROUND TERMINAL (pgs. 5, 6) To prevent electrical shocks, TV1, BCl and other prob- lems, connect this terminal to ground. @& UP/DOWN SWITCHES Changes the operating frequency or memory channel. Push and hold either of these switches to change the frequency or memory channel continuously. 45 PTT SWITCH Push to transmit. 4 UP/DOWN ON/OFF SWITCH Prevents accidental changes of the [UP] and [DN] switches. for free by RadioAmateur,eu 1-4 FUNCTION DISPLAY CONTROL FUNCTIONS 1 A „| Sem [Scan] LSBUSBCW- NAMFM (Gig (FUNC] MEMO pa AL [TUNE fpf © “Vi VEO A (LL A (LL SPLIT, ri a o e ® ® ® 08 47 SCAN INDICATOR “SCAN” (p. 23) Lights when scan is operating. MODE ¡INDICATORS Indicates the operating mode. @ RIT INDICATORS “RIT” (p.21) Lights when the RIT function is turned ON. 60 FUNCTION INDICATOR “FUNC” Lights when the [FUNC] switch is pushed. 6) MEMORY INDICATOR “MEMO” (p. 22) Lights when MEMORY mode is selected. 62 MEMORY CHANNEL INDICATOR (p. 22) Shows memory channel numbers. 63 SPLIT INDICATOR “SPLIT” (p. 21) Lights when split operation ts being used. VFO INDICATORS ‘WFO А” “VFO B” (p. 14) Indicate a VFO mode. 65 FREQUENCY DISPLAY Displays the operating frequency. 6ÿ THROUGH INDICATOR “THRU” (p. 10) Lights when the AH-3 HF AUTOMATIC ANTENNA TUNER (optional) is bypassed. 6) TUNING INDICATOR “TUNE” (р. 10) Lights when the AH-3 HF AUTOMATIC ANTENNA TUNER (optional) is being tuned. 68) TUNING DIGIT INDICATORS “~~” (pgs. 13, 14) Points to the lowest digit changed when the MAIN DIAL is rotated. for free by RadioAmateur.eu 1 ol 2 2-1 UNPACKING After unpacking, immediately describe any damage to the delivering carrier or dealer. Keep the shipping cartons. For a description and a diagram of accessory equipment in- cluded with the 1C-726, see UNPACKING on the inside front cover. INSTALLATION 2-2 MOUNTING THE TRANSCEIVER Select a location for the transceiver that allows adequate air circulation and access to the front and rear panels. Do not place in areas subject to extreme heat, cold, or vibrations, or near TV sets, radios and electro-magnetic sources. For mobile installations, an optional 1C-MB5 MOBILE MOUNTING BRACKET is available. Select a location which can support the weight of the transceiver and does not interfere with the operation of the vehicle. @®ADJUSTABLE ANGLES WHA The stand on the bottom of the IC-726 gives the transceiver two selectable angles. 2-3 ANTENNA Select an antenna, such as a well-matched 50 $2 antenna and feedline. The transmission line should be a coaxial cable. VSWR should be less than 1.5:1. CAUTION: Protect your transceiver from lightning by using a lightning arrestor. 2-4 GROUNDING To prevent electrical shocks, TVI, BCI and other problems, ground the transceiver through the GROUND terminal on the rear panel. For best results, connect a heavy gauge wire or strap to a long earth-sunk copper rod. Make the distance between the GROUND terminal and ground as short as possible. 2-5 WIRING THE DC POWER CABLE Insert a rubber grommet to the DC power cable to prevent shorting. grommet @PL-259 CONNECTOR INSTALLATION Coupling ring Lf 1 inch = 25.4 mm 1) Slide the coupling ring over the coaxial cable. 2) Strip the cable as shown in the diagram, and soft solder the center conductor. 3) Slide the connector body onto the cable and solder. 4) Screw the coupling ring onto the connector body. for free by RadioAmateur.eu 2-6 REAR PANEL CONNECTIONS INSTALLATION 2 e Dipole antenna (FOR HF BAND) O O PERES ANTENNA CONNECTOR CI-V REMOTE CONTROL JACK Transceive function connection Computer control connection with another Icom HF transceiver through a CT-17 CI-V LEVEL or receiver. CONVERTER (optional). OO of | ANTENNA CONNECTOR (FOR 50 MHz BAND) GROUND TERMINAL The transceiver MUST be grounded through this terminal. PS-55 AC POWER SUPPLY See p. 7 for connections. SP-7 EXTERNAL SPEAKER ACC SOCKETS ALC/SEND JACKS Seep. 11 See p. 8 Height and - design are matched with the IC-726. AH-3 HF AUTOMATIC ANTENNA | TUNER See pgs. 9 and 10 for details. AH-2b ANTENNA ELEMENT KIT = (sold separately) KEY JACK Straight key or external electronic keyer con- nection. 2-conductor phone plug can also be used. for free by RadioAmateur.eu 7 3 SYSTEM INTERCONNECTIONS 3-1 POWER SUPP LY CONNECTIONS CAUTION: Before connecting the DC power cable, | | heck the f ing i i . Маке. Use the PS-55 AC POWER SUPPLY (sold separately) re ollowing important items. Make when operating the IC-726 with AC power. Refer to the o The [POWER] switch is OFF diagram below. | e Output voltage of the power source is . 12 ~ 15 V when you want to use a non- The [POWER] switch on the 1C-726 front panel synchro- Icom power supply nizes the PS-55 with the 1C-726. : e DC power cable polarity is correct. red > positive (+) terminal black > negative (—) terminal eCONNECTING THE PS-55 ©) iE Bu) REA m je amer || own => u — © | 07000000 | Oleo 8 The [POWER] switch synchronizes | the PS-55 AC POWER SUPPLY - with the IC-726. eCONNECTING A NON-ICOM AC POWER SUPPLY IC-726 DC POWER SOCKET ' AC POWER SUPPLY + 13.8 V 20 A . black red © ® FUSES С AC OUTLET © 20 А Use the supplied DC power cable eCONNECTING A VEHICLE BATTERY NOTE: Use terminals for the „Tr cable connections. Crimp O black 12V BATTERY Supplied Sf DC power cable J for free by RadioAmateur.eu 3-2 LINEAR AMPLIFIER CONNECTIONS To connect the IC-2KL LINEAR AMPLIFIER or a linear amplifier not made by Icom, refer to the diagram below. The optional 1C-2KL HF LINEAR AMPLIFIER may be easily connected to the IC-726. OPC-118 (sold separately) is necessary. SYSTEM INTERCONNECTIONS 3 When connecting the transceiver to a non-Icom linear amplifier, connect the cables as shown in the diagram below. The specification for the keying relay is DC 16 V, 2 A maximum. If the linear amplifier requires greater voltage than the above value, a large relay must be installed between the amplifier and the transceiver. eCONNECTING THE IC-2KL ACC CABLE (Supplied with IC-2KL) To HF ANTENNAf, à COAXIAL CABLE | (Supplied with 1C-2KL) IC-2KL оо [= АМТ O O EB i 1 À | To IC-2KLPS | GND À IC-726 о во 00000 — L L- GROUND ACC(2) ACC(1) OPC-118 (Sold separately) eCONNECTING A NON-ICOM LINEAR AMPLIFIER To ANTENNA 50 2 COAXIAL CABLE O RF INPUT O RF OUTPUT ALC O IcD- ES SENDO Е m Yo MHz 10-726 We | Jo, Th, 02000000 ef ALC D pe for free by RadioAmateur.eu 3 SYSTEM INTERCONNECTIONS 3-3 ANTENNA TUNER CONNECTIONS It is recommended that an Icom antenna tuner be used between the 1C-726 and the antenna system for maximum transceiver performance. Refer to the instruction manuals of each antenna tuner below for more detailed connecting and operating infor- mation. When connecting the IC-726 to the IC-AT500 or IC-AT100, the optional OPC-118 INTERFACE CABLE is necessary. _ ®CONNECTING THE 1C-AT500 COAXIAL CABLE (Supplied with IC-AT500) 7) (Supplied with IC-2KL) ACC CABLE To HF AN В oO o()o = CONTROL CABLE (Supplied with AT-150) To HE IT COAXIAL CABLE ANTENNA ACC CABLE |] (Supplied with IC-2KL) (Supplied with | IC-AT500) | 0 is IC-AT5 => — HH -AT500 о OO faa == о tot || Jo [==] € EE © об bo 5. na <> ED D | 05000000 г 1 u” Ur To IC-2KLPS + (Sold coe — === Sold separately GROUND eCONNECTING THE AT-150 COAXIAL CABLE TENNA (Supplied with AT-150) wo B В oOo oO)o o(O)o oO) 10-726 o GROUND eCONNECTING THE AH-3 OR AH-2 al = | Jo, EL 002000000 IC-726 AH-3 or AH-2 | y | ne To ANTENNA ELEMENT У for free by RadioAmateur.eu 3-4 AH-3 OPERATING PROCEDURES The AH-3 HF AUTOMATIC ANTENNA TUNER is designed for use with the IC-726. By pushing the [TUNER] switch on the IC-726 front panel, the AH-3 tunes at 50 (2 on 1.8 MHz ~ 30 MHz with a length of 12 m (40 ft) wire. The AH-2a HF AUTOMATIC ANTENNA TUNER can be used with the 1C-726 without the supplied CONTROLLER UNIT. Following are the simple operation procedures for using the AH-3 HF AUTOMATIC ANTENNA TUNER: 1) Connect cables from the AH-3 and antenna wire as shown in the diagram on p. 9. 2) Turn transceiver power ON, 3-5 AFSK TERMINAL UNIT CONNECTION When operating an AFSK such as RTTY, AMTOR or packet, connect external equipment to the ACC(1) SOCKET on the rear panel or MIC CONNECTOR on the front panel as in the following diagram below. SYSTEM INTERCONNECTIONS 3 3) Select the desired band and frequency. 4) Push the [TUNER] switch. e “TUNE” flashes on the FUNCTION DISPLAY. e The AH-3 automatically tunes at 50 (2. 5) “TUNE” steadily appears when the AH-3 tunes at 50 (2. 6) “THRU” appears when the AH-3 cannot tune at 50 92. eWhen “THRU” appears, the AH-3 is bypassed and the antenna wire is connected to the antenna connector on the 1C-726 directly. 7) When you want to bypass the AH-3 manually, push the [FUNC] switch then push the [TUNER] switch. e “THRU” appears on the FUNCTION DISPLAY. See p. 11 for ACC(1) and MIC CONNECTOR pin information. e Using the ACC(1) SOCKET (Rear panel view) (Е) D A в ® m AFSK output IL © L - © © AF input Using the MIC CONNECTOR D SQUELCH input (Front panel view) © E «-————— PTT © E Ground (GND) B (Р AFSK TERMINAL UNIT Е) D 3-6 MIC CONNECTOR INFORMATION i PIN NO. FUNCTION - DESCRIPTION (Front panel view) ® AF OUTPUT 2 +8 V DC output Max. 10 mA MIC INPUT DGND 3 | Frequeneyup | Ground __________, . (microphone ground) Frequency down Ground through 470 Q @+8V DC @GND 4 |-Sauelchopen ___ | "LOW" ве! | OUTPUT © (PTT ground) Squelch closed “HIGH” level 3)FREO a UP/DOWN SPTT CAUTION: DO NOT short pin 2 to ground as this can (À) &SQUELCH SWITCH damage the internal 8 V regulator. for free by RadioAmateur.eu Hi 3 SYSTEM INTERCONNECTIONS @HM-12 SCHEMATIC DIAGRAM MICROPHONE MICROPHONE CABLE MICROPHONE PLUG PTT 6 RECEIVE o TRANSMIT ou O AA м мент) m у _ $ + И Om $ + ЦФТ + 0.334 UP/DOWN DOWN UP uu A les Le | 470 3-7 ACC SOCKET INFORMATION (1) ACC(1) SOCKET PIN NO. |PIN NAME DESCRIPTION SPECIFICATIONS 1 NC No connection. я 2 GND Connects to ground. Connected in parallel with ACC(2) pin 2. Input/output pin. 3 SEND Goes to ground when transmitting. When grounded, transmits. Ground level : —05-0.8V Input current : less than 20 mA Connected in parallel with ACC(2) pin 3. 4 MOD Modulator input. Input impedance : 10 kQ Connects to.a modulator. Input level : Approx. 100 mV rms 5 AF AF detector output. Output impedance : 4.7kQ Fixed, regardless of [AF] position. Output level : 100 ~ 300 mV rms 6 SOLS Squelch output. SOL open : Less than 0.3 V/5mA Goes to ground when squelch opens. SOL closed : More than 6.0 V/100 uA , Output current : Мах. ТА / 13.8 У 13.8 V output when power is ОМ. Connected in parallel with ACC(2) pin 7. Control voltage : A-0V 8 ALC ALC voltage input. Input impedance : More than 10 k£2 Connected in parallel with ACC(2) pin 5. (2) ACC(2) SOCKET PIN NO. |PIN NAME DESCRIPTION | o - SPECIFICATIONS 1 | ay Regulated 8 V output. Output current : Less than 10mA 2 GND Same as ACC(1) pin 2. 3 SEND Same as ACC(1) pin 3. 4 BAND Band voltage output. Output voltage : 0~8.0V (Varies with amateur band) 5 ALC Same as ACC(1) pin 8. 6 NC No connection. ee 7 13.8 V Same as ACC(1) pin 7. for free by RadioAmateur.eu 3-8 REMOTE JACK (CI-V) INFORMATION The IC-726 can be connected through a CT-17 CI-V LEVEL CONVERTER (optional) to a personal computer equipped with an RS-232C port. Icom Communication Interface - V (CI-V) controls frequency, mode, memory channels, etc. eCT-17 CONNECTION Up to four Icom CI-V transceivers can be connected to a personal computer equipped with an RS-232C port. AC outlet 9-15V [5 ос Регзопа! computer = Е CT-17 SA /DINZO | НЫ AO | ir } —— | av bus line TSAR «> (1) CI-V CONDITION Transmitters and receivers using the Icom Ci-V System exchange serial information in the packet format. The contents of a data packet can be changed by diodes D2 ~ D4, D57 ~ D63 and D64 on the MAIN UNIT. See diagram at right below for the location of these diodes. O Baud rate Baud rate is the data transfer rate. The standard Icom Cl-V baud rate is 1200 bps. BAUD RATE DIODE (bps) D2 D3 9600 Insert diode | ----- 1200 | ----- Insert diode 300 Insert diode | Insert diode |] : Default O Frequency data When connecting the transceiver with the IC-735, change the value to 4 bytes. FREQUENCY DATA DIODE (D4) 4 bytes No diode (Cut D4) 5 bytes Insert diode [ | : Default SYSTEM INTERCONNECTIONS 3 e Address You can set an independent address for your IC-726. The 1C-726 has the address of 30H (48) as a default value. Figures marked with an H are hexidecimals and bracketed figures [ ) are decimals. DIODE D57 | D58 | D59 D60 D61 D62 D63 (1) | (2) (4) (8) (16} | (32) | (64) Insert | Insert diode | diode - [| : Default 28H (40) e Transceive Transceive operation is possible using the IC-726 with another transceiver such as the IC-781. Either transceiver can be used as the transmitter or receiver. TRANSCEIVE DIODE (D64) ON Insert diode OFF No diode (Cut D64) |] : Default (2) DIODE LOCATION Diodes are located on the PLL UNIT as shown in the diagram below. See p. 24 for transceiver disassembly information. Front panel side for free by RadioAmateur.eu 13 A 4-1 INITIAL SETTINGS PRE-OPERATION NOTE: Follow all instructions in Section 3 before operating the transceiver. Turn the [POWER] switch OFF before connecting the DC power cable to the DC power socket on the rear panel. Set switches and controls as shown in the table below. SWITCH POSITION SWITCH POSITION POWER OUT LOCK OUT TRANSMIT OUT AF CCW NB OUT SQL CCW ATT OUT MIC CENTER PRE - OUT RF PWR CW AGC OUT —— —— CW: Clockwise CCW: Counterclockwise 4-2 FREQUENCY SELECTION (1) BAND SELECTION The IC-726 covers all amateur bands from 1.9 MHz ~ 50 MHz for transmitting and has receive capability from 500 kHz ~ 54 MHz. The IC-726 has a convenient band stacking register function (see below). 1) Push the [BAND] switch. e Two “~w’’ appear above the digits that can be changed. | Y Two ‘‘—"s appear. 2) Rotate the MAIN DIAL to select the desired amateur band. | eTo select the desired operating frequency, see (2) OPERATING FREQUENCY SELECTION on the next page. e Band changes occur as shown in the following diagram. [| These digits change. CW 3) Push the [BAND] switch again to cancel the [BAND] switch function. Two “~"'s disappear. yy CW A NA AN FAA VFOA IE L (1 1. Lil L. Wt (2) OPERATING FREQUENCY SELECTION 1) To select the desired operating band, see (1) BAND SELECTION on the previous page. 2) Rotate the MAIN DIAL to set the desired operating frequency. eFaster MAIN DIAL rotation automatically shifts the tuning increment by 10 kHz steps. 3) To change the frequency quickly, see Section (3) below. 4) To change the minimum frequency step, see Section (4) below. Tech Talk from Icom Q. What is the function of the band stacking register? A. The band stacking register stores operating fre- quencies in VFO modes, switches bands, and returns the transceiver to stored frequencies. This is especially convenient when switching bands during contests and for quick monitoring of pro- pagation conditions on other bands. eBAND STACKING REGISTER EXAMPLE Each band stores the last used frequency and mode. BAND LI IN USE © ICM Anos ae ¡| e 1250.00 co! | The displayed fre- quency is kept until new information is input. USB 28.588.508 "26/17 (28 MHz band) +-- (21 MHz band) for free by RadioAmateur.eu (3) QUICKLY CHANGING THE FREQUENCY e To change the frequency in 1 kHz steps, push the [kHz] switch and ““~’’ appears above the kHz digit. Each push of the [kHz] switch alternately turns ON and OFF “y”. SCT 4 © © © = Push [kHz]. El E = a” al». Lim digit and the above digit change. e To change the frequency in 1 kHz steps, push the [MHz] and ‘‘~’’ appears above the MHz digit. e BE co © O O Push [MHz]. —— * + ' appears. des AIN NNNOA TE Pee AR LI This digit and the above digit change. (4) CHANGING THE MINIMUM FREQUENCY STEP The 1C-726 is set at 10 Hz steps in SSB and CW modes, and is set at 1 kHz steps in AM and FM modes as default. However, the frequency steps can be changed to 10 Hz, 20 Hz or 50 Hz as follows: 1) Push the [FUNC] switch. 2) Push and hold the [kHz] switch, then rotate the MAIN DIAL. e The FUNCTION DISPLAY shows frequency steps for 10 Hz, 20 Hz and 50 Hz sequentially. USB m VFOA fF » Let | 3) Select the desired frequency step then release the [kHz] switch. PRE-OPERATION A (5) AUTO TUNING STEP FUNCTION The tuning steps in AM and FM modes are set at 1 kHz as a default value at the factory. The tuning steps are auto- matically selected for tuning purposes when AM or FM is selected as the IC-726 has an auto tuning step function. The function can be turned OFF as follows when desired: 1) To turn OFF the function, push the [FUNC] switch, then push the [AM/FM] switch. 2) To turn ON the function again, repeat the procedure in item 1 above. (6) TURNING ON AND OFF THE 10 Hz DIGIT The 10 Hz digit can be turned ON and OFF. The frequency changes in the set frequency step even if the digit is turned OFF. 1) Push the [FUNC] switch. 2) Push the [BAND] switch. e The 10 Hz digit disappears. USB — TIDCLNT VOA TE CLL CL | LK Disappears. 3) Push the [FUNC] switch then push the [BAND] switch to turn ON the 10 Hz digit. e The 10 Hz digit appears again. 1 CAC TIUTETEVFOR 10 ! LAL сы Е Appears again. 4-3 VFO A AND VFO B SELECTION The IC-726 contains two VFOs which both receive and transmit. The VFOs are called VFO A and VFO B. This dual VFO system provides tremendous operating flexibility. Push the [VFO] switch to select VFO Aor VFOB. USB a ı IL TUN IL г (LU LIE Г. 71 > с и JT < Tl © titi IC VTA (Ed Lin VPOBL IT for free by RadioAmateur.eu 4 PRE-OPERATION 4-4 RECEIVER CONTROLS AND SWITCHES SQUELCH CONTROL Mutes the speaker. Signals and noises that are stronger than the squelch threshold level open the squelch and audio is emitted from the speaker. AF GAIN CONTROL Varies the audio output level from the speaker. Clockwise rotation increases the volume. Adjust the following controls and switches on the front panel for optimum reception. | RIT CONTROL Used for fine tuning stations which call off frequency or for compensating for frequency drift. Shifts the receive frequency up to +1 kHz from the displayed frequency without shifting the transmit frequency. (a H +) С A Г уе | зРЫт | up ‹ 7), <= PSC) =B | 5 5 1 УЕО А TC [P.SCH ! ГА=В | M-CH TRANSMIT ; LL [м.5С,| | ГМ-УЕО } | | men >| MW | oown | 4| sa kHz | RIT = (ИУС TUNER [ FUNC : | FM TONE THROUGH) in CW/N SWITCH By installing an optional CW narrow filter. The transceiver has better receive selectivity in CW mode. AGC SWITCH Out position: AGC slow Normally used when operating in SSB or AM mode. In position: AGC fast Normally used when operating in CW mode. Note that the AGC switch does not function in FM mode. PREAMP SWITCH Used when receiving weak signals. Push [PREAMP] to the IN position to improve the S/N ratio and sensitivity. Especially useful during DX operation. ATTENUATOR SWITCH Used when the received sound from the speaker is distorted by very strong signals. Push [ATT] to the IN position to activate the 20 dB attenuator. NOISE BLANKER SWITCH Reduces pulse-type noise such as that generated by auto- mobile ignition systems. Note that the noise blanker function does not function in AM and FM modes and may not work well when strong signals are on nearby frequencies or when noise is con- tinuous rather than pulse-type. for free by RadioAmateur.eu PRE-OPERATION 4 4-5 TRANSMITTER CONTROLS AND SWITCH TRANSMIT/ALC INDICATOR Lights up when transmitting. Lighting intensity depends on the mic gain and your voice level. See MIC GAIN control information below. SPLIT SWITCH For transmitting on one frequency and receiving on another. See detailed information on p. 21. г” я | VFO | sr it | UP :P.SCAN | ГА=В ! M-CH IM.SCAN: | M-VFO N | memo | MW | DOW Oe TUNER CFUNC | EY | РМ ТОМЕ [THROUGH] LOCK in RF POWER CONTROL Varies the RF output power from 10 W to maximum. Adjust this control for the desired output power level. Maximum output power eSSB : (HF) 100 W PEP, (50 MHz) 10 W PEP eCW, FM : (HF) 100 W, (50 MHz) 10 W e AM : (HF) 40 W, (50 MHz) 4 W MIC GAIN Used for adjusting the mic gain. Adjust this control to the point where the ALC indicator lights up at its brightest level while speaking into the mic using your normal voice level. See ALC INDICATOR information above. the signal. However, if the input signal level exceeds the limit of linearity, the linear amplifier outputs distorted signals because the signal is amplified ina non-linear area of the signal. Tech Talk from Icom Q: What is ALC? A: ALC means Automatic Level Control. The ALC circuit limits output power by controlling the input level of the RF power amplifier. The RF power amplifier is designed as a linear amplifier to amplify an input signal proportionally. The linear amplifier functions in the linear area of To prevent transmitting distorted signals, the ALC circuit detects a signal and applies it to a driver amplifier as feedback to reduce driver output power. Therefore, the input signal level to the RF power amplifier is reduced and the transceiver transmits clear signals. for free by RadioAmateur.eu 5-1 SSB OPERATION И ШИ D BASIC OPERATION [SPLIT] OFF [ATT] [SSB] OUT position Push [SSB] (p. 15) (pgs. 16, 21) 'PSCAN: " A=B ПМ САН Г М-УЕО [NB] OUT position (p. 15) [RIT] OFF (pgs. 15, 21) [PRE] [AGC] OUT position OUT position (p. 15) (p. 15) (1) SSB RECEIVING 1) Set controls and switches as described on p. 13. 2) Push [POWER] IN to activate the transceiver. 3) Select the desired operating band. (See p. 13) 4) Push [SSB]. e USB is automatically selected on bands above 7 MHz. LSB is automatically selected on bands below 10 MHz. e Push [SSB] again to select the opposite side of the side band. 5) Adjust [AF] as desired. (Seep. 15) 6) Adjust [SQL], if needed. (See p. 15) 7) Rotate the MAIN DIAL to receive a signal. 8) Use the controls and switches described on p. 15 for better receiving. [TUNER] Activates only when the AH-3 is connected. (p. 10) (2) SSB TRANSMITTING NOTE: Listen before you transmit to prevent inter- ference. 1) Push the PTT switch on the microphone or push [TRANSMIT] IN to transmit. 2) Speak naturally into the microphone. e When you transmit a signal, the meter needle moves. 3) Adjust [RF POWER] to the desired output power. (See p. 16) 4) Adjust [MIC], if needed. (See p. 16) 5) Release the PTT switch to return to receiving. for free by RadioAmateur.eu 5-2 CW OPERATION BASIC OPERATION 5 [ATT] [CW/N] [SPLIT] OUT position Push [CW/N] OFF (p. 15) (pgs. 16, 21) L r = PSCAN, CAB MSCAN, TM:VEO сом AF -@ SOL INE] Oo 6 | OUT position de , (p. 15) oo Fi ео он С° | Г И “LJ [PRE] [AGC] OUT position IN position (p. 15) (p. 15) [RIT] OFF (pgs. 15, 21) (1) CW RECEIVING 1) Set controls and switches as described on p. 13. 2) Push [POWER] IN to activate the transceiver. 3) Select the desired operating band. (See p. 13) 4) Push [CW] . ePush [CW] again to select the CW narrow mode. Operating in CW narrow mode requires an optional CW narrow filter. (See p. 36) 5) Adjust [AF] as desired. (See p. 15) 6) Adjust [SOL], if needed. (See p. 15) 7) Push [AGC] (See p. 15) IN to select the AGC fast condition. 8) Rotate the MAIN DIAL to receive a signal. 9) Use the controls and switches described on p. 15 for better receiving. [TUNER] Activates only when the AH-3 is connected. (p. 10) (2) CW TRANSMITTING Plug a straight key or electric keyer into the [KEY] jack on the rear panel. NOTE: Listen before you transmit to prevent inter- ference. ®NORMAL CW OPERATION 1) Make sure the [BK IN] switch on the rear panel is in the OUT position. 2) Push IN [TRANSMIT] to transmit. 3) Operate the CW key. 4) Adjust [RF POWER] to the desired output power level. 5) Push OUT [TRANSMIT] to return to receive. eCW BREAK-IN OPERATION 1) Push IN the [BK IN] switch on the rear panel. 2) Operate the CW key. 3) Adjust IDELAY] control on the rear panel. e Clockwise rotation increases the transmit release delay time. 4) Adjust [RF POWER] to the desired output power level. 5) Transmit/receive switching is automatic. for free by RadioAmateur.eu 5 BASIC OPERATION 5-3 AM OPERATION [NB] OUT position (p. 15) [ATT] _ [AM/FM] [SPLIT] OUT position Push [AM/FM] OFF (p. 15) (pgs. 16, 21) Ll Г К РОМЕН Е (PSCAN] (A=8) M IM.SCAN| | M-VFO | [RIT] OFF (pgs. 15, 21) BAND Cd (1) AM RECEIVING 1) Set controls and switches as described on p. 13. 2) Push [POWER] IN to activate the transceiver. 3) Select the desired operating band. (See p. 13) 4) Push [AM/FM] to select AM mode. 5) Adjust [AF] control as desired. (See p. 15) 6) Adjust [SQL], if needed. (See p. 15) 7) Rotate the MAIN DIAL to receive a signal. 8) Use the controls and switches described on p. 15 for better receiving. = Ns TUNER {FUNC > ES =| == OCK Wey FM TONE (THR | UGH) | == — A [PRE] [AGO] Activates only OUT position OUT position when the AH-3 is (p. 15) (p. 15) connected. (p. 10) (2) AM TRANSMITTING NOTE: Listen before you transmit to prevent inter- 2.0... ference. | 1) Push the PTT switch on the microphone or push [TRANSMIT] IN to transmit. 2) Speak naturally into the microphone. e When you transmit a signal, the meter needle indicates a point and moves slightly according to your voice level. 3) Adjust [RF POWER] to the desired output power level. e AM output power : (HF) 40 W max. (50 MHz) 4 W max. 4) Set [MIC] to the center position. e To increase the microphone gain, rotate [MIC] clock- wise. 5) Release the PTT switch to return to receiving. for free by RadioAmateur.eu 5-4 FM OPERATION BASIC OPERATION 5 [ATT] [AM/FM] OUT position Push [AM/FM] (p. 15) [SPLIT] OFF (pgs. 16, 21) POWER TRANSMIT | VFO VFO A a" P.SCAN | | A=8 j iM.SCAN] M-WFO : com AF © SOL === [ R IT] [NB] >) ET © = (p ot 5 21) OUT position nu ~~ io. 15) | “|: Lock TUNER CFUNE CT —— [PRE] [AGC] [TUNER] OUT u: Zo Activates only position OUT position when the AH-3 is (p. 15) (p. 15) connected. (p. 10) (1) FM RECEIVING 1) Set controls and switches as described on p. 13. | 2) Push [POWER] IN to activate the transceiver. 3) Select the desired operating band. (See p. 13) 4) Push [AM/FM] to select FM mode. 5) Adjust [AF] as desired. (See p. 15) 6) Adjust [SQL], if needed. (See p. 15) 7) Rotate the MAIN DIAL to receive a signal. 8) Use the controls and switches described on p. 15 for better reception. (2) FM TRANSMITTING NOTE: Listen before you transmit to prevent inter- ference. EEE ee 1) Push the PTT switch on the microphone .or push [TRANSMIT] IN to transmit. 2) Speak naturally into the microphone. e When you transmit a signal, the meter needle indicates a point and moves slightly according to your voice level. 3) Adjust [RF POWER] to the desired output power level. 4) Set [MIC] to the center position. e To increase the mic gain, rotate [MIC] clockwise. 5) Release the PTT switch to return to receiving. eSUBAUDIBLE TONE TRANSMITTING A subaudible tone is often required to access HF FM repeaters. See p. 29 when installing the UT-30 PROGRAM- MABLE TONE ENCODER UNIT. 1) Push the PTT switch on the microphone or push [TRANSMIT] IN to transmit. 2) Push [LOCK] IN to transmit tone signals. 3) Push [LOCK] OUT to stop transmitting tone signals. 20 for free by RadioAmateur.eu 21 5 BASIC OPERATION 9-5 RIT/Af FUNCTION By using the RIT function, it is possible to shift the receive frequency up to +1 kHz on 10 Hz steps without moving the transmit frequency. This is useful for fine tuning stations which transmit using off frequency or for compensating for frequency drift. The 1C-726 has an added feature: the RIT shift frequency can be added to the displayed frequency. 1) Push the [RIT] switch to activate the RIT function. e’’RIT” appears on the FUNCTION DISPLAY. 2) Rotate the RIT control. e Clockwise rotation e Counterclockwise rotation Increases frequency Decreases frequency 3) To add the RIT shift frequency to the displayed fre- quency, push the [FUNC] switch then push the [RIT] switch. e The displayed frequency changes. e “RIT” disappears. 4) To clear the RIT shift frequency, push the [RIT] switch. e "RIT" disappears. 5-6 SPLIT OPERATION Split operation allows you to transmit and receive on two different frequencies. The IC-726 provides split operation using either of the following two methods: (1) Using the contents of VFO A and VFO B in VFO mode. (2) Using memory channel 23 or 24 in MEMORY mode. (1) USING VFO A AND B MODES Split operation is possible using the contents of VFO A and VFO B in VFO mode. Following is an example for 21.2500 MHz / USB for receiv- ing and 21.3600 MHz / USB for transmitting using split operation. VFO A: Displayed frequency for receiving USB ГЛ Г ГИ \РОА TEL L LL COIL ccs LL УРО В : Transmit frequency USB TE = CLIO мов 1) Set the frequency and mode for 21.2500 MHz and USB in VFO A mode. 2) Set the frequency and mode for 21.3600 MHz and USB in VFO B mode. 3) Push the [VFO] switch to select VFO A mode. 4) Push the [SPLIT] switch. 5) Push either the PTT or [TRANSMIT] switch to transmit. e You are transmitting on 21.3600 MHz in USB mode and receiving on 21.2500 MHz in USB mode. 6) To change the transmit and receive frequencies in the split operation, push the [VFO] switch to select the VFO B indicated. (2) USING MEMORY CHANNEL 23 OR 24 Memory channels 23- and 24 can memorize both transmit and receive frequencies. This is useful for selecting the most often used split frequencies. Following is an example for 21.2500 MHz / USB for receiv- ing and 21.3600 MHz / USB for transmitting using split operation. . ®©How to memorize split frequencies into memory channel 23 1) Select VFO A mode and push the [UP] or [DOWN] switch to select memory channel 23. 2) Push the [SPLIT] switch. e “SPLIT” appears. 3) Set the frequency and mode to 21.2500 MHz and USB and push the [MW] switch to memorize the information. 4) Push the [VFO] switch to select VFO B mode. 5) Set the frequency and mode to 21.3600 MHz and USB, and push the [MW] switch to memorize the information. ® How to operate the split frequencies 1) Push the [MEMO] switch to select MEMORY mode and push the [UP] or [DOWN] switch to select memory channel 23. 2) Push the [SPLIT] SWITCH. e “SPLIT” appears. 3) Push either the PTT or [TRANSMIT] switch to transmit. e You are transmitting on 21.3600 MHz in USB mode and receiving on 21.2500 MHz in USB mode. 4) To reverse the transmit and receive frequencies, follow the steps above for memorizing frequencies, reversing the VFOs. for free by RadioAmateur.eu MEMORY CHANNEL OPERATION The 1C-726 has 26 memory channels. The memory func- tion is very useful for quickly changing to a desired fre- quency. Memory channels 0 ~ 26 can be programmed with one fre- quency and one mode in each memory channel. Memory channels 23 ~ 26 also have the following special memory functions: MEMORY CHANNEL NUMBER - CAPABILITY o One frequency and one mode 0 - 22 . in each memory channel. Independent transmit and 23 and 24 receive frequencies and mode on each channel for split operation. One frequency and one mode 25 and 26 on each memory channel as scan edges of Programmed Scan. 6-1 VFO AND MEMORY MODE SELECTION 1) Push the [MEMO] switch to select MEMORY mode. 2) Push the [VFO] switch to move to VFO mode. eVFO MODE eMEMORY MODE “VFO A” or “VFO B” appear. “MEMO” appears.—. | т FM Cy FM MEMO PA FAA NFOA “jr FA FIA In Ju! LL A LL 6-2 MEMORY CHANNEL SELECTION 1) Push the [MEMO] switch to select MEMORY mode. 2) Push the [UP] or [DOWN] switch on the front panel, or the [UP] or [DN] switch on the microphone to select the desired memory channel. 6 6-4 FREQUENCY TRANSFERRING [M> VFO] The selected memory contents in a memory channel can be transferred to a VFO mode. This switch operates dif- ferently depending on which mode the 1C-726 is in. (1) IN VFO MODE The frequency and mode stored in the displayed memory channel are transferred to a selected VFO mode. 1) Push the [UP] or [DOWN] switch to select the desired memory channel you want to read. 2) Push the [FUNC] switch then the [MW] switch. eMemory contents in the displayed memory channel number appear on the FUNCTION DISPLAY. Operating frequency : 21.26000 MHz/USB Contents of MEMO 20 : 14.10000 MHz/CW USB Ели Air VFOA “171 L IL LILI LILI AL Push [FUNC], then [MW]. CW it UMW TUT VEO 71 ıı. (LILI. LILI LL - NOTE: When the [LOCK] switch is pushed IN, only memory channels with the same operating mode as displayed are selected when the [UP] or [DOWN] switch is pushed. 6-3 MEMORY WRITING 1) Select either VFO or MEMORY mode. 2) Push the [UP] or [DOWN] switch to select the desired memory channel. 3) Set the desired frequency and mode you want to memorize. 4) Push the [MW] switch to memorize the information. (2) IN MEMORY MODE The displayed frequency and mode are transferred to the VFO used immediately prior to changing to MEMORY mode. 1) Push the [UP] or [DOWN] switch to select the desired memory channel you want to read. 2) Push the [FUNC] switch then the [MW] switch. e The displayed memory contents are transferred. 3) Push the [VFO] switch. e The selected memory contents are displayed. Operating memory channel MEMO 20 14.10000 MHz/CW CW MEMO int othr FAA rt (a tur. Lil LL \/ Push [FUNC], then [MW] Push [VFO]. CW (ot AUT FIFA YFOA 771 гг ти. LL for free by RadioAmateur.eu 23 Г The 1C-726 is equipped with three separate scan functions which provide tremendous scanning versatility at the touch of a few switches. 7-1 SCAN TYPES SCAN NAME FUNCTION Repeatedly scans between two user- ES programmed scan edges (MEMO 25 and 26). MEMORY Repeatedly scans all memory chan- SCAN nels. SELECTED Repeatedly scans memory channels MODE MEMORY | with the same selected operating SCAN mode. 7-2 PROGRAMMED SCAN Scan Scan edge A or B Scan edge Bor A Jump 1) Program the high and low frequency edges of the desired scanning range into MEMO 25 and 26. See p. 22 for programming the memory channels. e Either channel can have the higher or lower frequency stored. 2) Push the [VFO] switch to select VFO mode. 3) Select LSB, USB, CW, AM or FM mode. 4) Adjust the [SOL] control to the threshold point. 5) Push the [FUNC] switch then push the [VFO] switch. e The scan begins from the lower limit of the range. e The scan stops when a receive signal opens the squelch. e The scan resumes after the signal disappears. 6) Push the [VFO] switch again to stop the scan. e The following switches and controls also stop the scan: [PTT] [TRANSMIT] [MEMO] [MW] MAIN DIAL 7-3 MEMORY SCAN transceiver receives a signal. SCANNING OPERATION 1) Program the desired frequencies into memory channels. See p. 22 for programming memory channels. 2) Push the [MEMO] switch to select the MEMORY mode. 3) Adjust the [SQL] control to the threshold point. 4) Push the [FUNC] switch then push the [MEMO] switch. e The scan begins. e The scan stops when a receive signal opens the squelch. e The scan resumes after the signal disappears. 5) Push the [MEMO] switch again to stop the scan. e The following switches and controls also stop the scan: . [PTT] [TRANSMIT] [VFO] [MW] MAIN DIAL 7-4 SELECTED MODE MEMORY SCAN Mech 26 1) Program the desired frequencies into memory channels. See p. 22 for programming memory channels. 2) Push the [MEMO] switch to select MEMORY mode. 3) Adjust the [SQL] control to the threshold point. 4) Select LSB, USB, CW, AM or FM modes. 5) Push the [LOCK] switch IN. 6) Push the [FUNC] switch thenpush the [MEMO] switch. e The scan begins. e The scan stops when a receive signal opens the squelch. e The scan resumes after the signal disappears. 7) Push the [MEMO] switch again to stop the scan. e The following switches and controls also stop the scan: [PTT] [TRANSMIT] [VFO] [MW] MAIN DIAL 7-5 SUPPLEMENTAL SCAN SETTINGS (1) SCAN SPEED Scan speed in the IC-726 is set for fast speed at the factory. See p. 28 for converting to a slower scan speed. (2) SCAN CLEAR The scan function can be automatically cleared when the See p. 28 for setting the transceiver in the scan clear condition. for free by RadioAmateur.eu MAINTENANCE AND ADJUSTMENT & М 8-1 DISASSEMBLING THE W OPENING THE PA UNIT TRANSCEIVER (Fig. 4) Follow the transceiver disassembly procedures shown here when you want to install an option or replace a component. CAUTION: DISCONNECT the DC power cable from | the transceiver before performing any work on the transceiver. | Ä | Ш REMOVING COVERS (Fig. 1) cr] arf ae Ш REMOVING THE PA UNIT SHIELD COVER (Fig. 5) 1) To remove top and bottom covers, unscrew the 16 screws shown in the diagram. (Fig. 1) 2) Unscrew. the 4 screws shown in the diagram before opening the PA UNIT. (Fig. 2) 3) Unplug 2 plugs from J11 and J12 as shown in the diagram. (Fig. 3) M@ PREPARATION FOR OPENING THE PA 4) Disconnect the 8-pin connector from J7 on the PLL UNIT AND LOGIC UNIT UNIT as shown in the diagram. (Fig. 4) (Fig. 3) | 5) Disconnect the black connector (indicated by *1). AA Ll a (Fig. 4) Е RUE 4 6) Slide up and remove the TUNER CONTROL SOCKET a (indicated by *2) from the holder. (Fig. 4) Carr) — Lo EJ 4 + 7) Open the PA UNIT as shown in the diagram. (Fig. 5) С) NS > Es 8) Unscrew the 19 screws to remove the PA UNIT shield cover as shown in the diagram. (Fig. 5) RS ^ 9) To remove the PLL UNIT, unplug the 4 plugs from J4, „® | J5, J6 and J13 on the MAIN UNIT. (Fig. 3) 9 e See pgs. 31 and 32 for plug connection information. | _ 24 for free by RadioAmateur.eu 25 8 MAINTENANCE AND ADJUSTMENT 8-2 FUSE REPLACEMENT lf the fuse blows or the transceiver stops functioning, find the source of the problem if possible, and replace the damaged fuse with a new, rated fuse. CAUTION: Disconnect the DC power cable from the DC POWER SOCKET on the rear panel when changing the fuse. eDC power cable fuses. . ..............,..... 20A e Circuitry fuse............... F.G.M.B. 125 V, 4 A eDC LINE FUSE REPLACEMENT eCIRCUITRY FUSE REPLACEMENT The fuse ts installed in the PA UNIT. 12 V of DC power are applied to the circuitry in the 1C-726 through the DC line fuse and the PA circuit. See p. 24 before removing the IC-726 covers. | PA UNIT | IN Y mu AS 4 A fuse 6 7 8-3 CPU RESETTING The FREQUENCY DISPLAY may occasionally display erroneous information, e.g., when first applying power. This may be caused externally by static electricity or other factors. lf this problem occurs, turn the [POWER] switch OFF. Wait a few seconds, and then turn ON power again. If the problem continues, perform the following procedure: NOTE: CPU resetting clears all memory information. 1) Turn the [POWER] switch OFF. 2) Push and hold the [FUNC] and [MW] switches, and push the [POWER] switch IN. e All information is displayed for a couple seconds then 14.1000 MHz is displayed. [SCAN] [SCAN] LSBUSBCW- NAMFM Gi [FUNC] MEMO TUNE (11 j CE i ЯН уго 1 El [THRU] fof Eo Cee LIEN spor LIE 3) Release switches. The CPU is now reset. 8-4 CPU BACKUP BATTERY The IC-726 has a lithium backup battery for retaining - memory information. The usual life of the backup battery is approximately five years. When the battery is exhausted, the transceiver transmits and receives normally but the transceiver cannot retain memory information. NOTE: Backup battery replacement should be done by an authorized Icom Dealer or Service Center. 8-5 CLEANING lf the transceiver becomes dusty or dirty, wipe it clean with a dry, soft cloth. Avoid the use of strong cleaning agents such as benzine or alcohol as they may damage the surfaces of the transceiver. for free by RadioAmateur.eu MAINTENANCE AND ADJUSTMENT 8 8-6 TROUBLESHOOTING The following chart is designed to help you correct pro- If you are not able to locate the cause of a problem or solve it through the use of this chart, contact your nearest Icom Service Center or Dealer. blems which are not equipment malfunctions. PROBLEM POSSIBLE CAUSE SOLUTION REF. ePower does not come on | e Power cable is improperly connected. ® Reconnect the power cable securely. p. 7 when the [POWER] switch e Fuse is blown. e Check for the cause, then replace the fuse with | p. 25 is pushed. . . . (Fuses are installed in two places. One is a spare one. installed in the DC power cable and the DC power cable other is installed in the PA unit. See p. 25 PA UNIT for their locations.) ® Battery is exhausted. @ Check the battery voltage with the transceiver p. 7 turned ON. eNo sound comes from the | e Volume level is too low. e Rotate the [AF] control clockwise to obtaina | p.15 speaker. suitable listening level. ® The squelch is closed. @ Rotate the [SOL] contro! counterclockwise to p. 15 open the squelch. e The transceiver is in transmit mode. ePush the [TRANSMIT] switch to the out |p. 2 position to return to receive mode. e An external speaker or headphones are in | @Check the external speaker or headphones plug |p. 6 use. connection. ® The transceiver is in CW narrow mode. e Operating CW narrow mode requires either the | p. 18 FL-100 or FL-101 (sold separately). e Sensitivity is low. e The antenna feedline is cut or shorted. eCheck the feedline and correct any improper |p. 5 conditions. e Attenuator circuit is inserted in the RF @Push the [ATT] switch to the out position to | p. 15 circuit. disconnect the circuit. e Antenna is not properly tuned when | e Push the [TUNE] switch to tune the antenna. p. 10 using the AH-3, @Receive signal is distorted | e The noise blanker function is turned ON. ePush the [NB] switch to the out position to |p. 15 with strong signals. turn OFF the function. e Output power is low. e Output power is set at low. eRotate the [RF PWR] control clockwise. | p. 16 Ciockwise rotation increases the power. e Mic gain is set at low. e Rotate the [MIC] control clockwise. Clock- | p. 16 wise rotation increases the mic gain. e The antenna feedline is cut or shorted. eCheck the feedline and correct any improper |p. 5 conditions. e Operating mode is set to AM. e The transceiver outputs 40 W maximum in AM. p. 19 eNo contact possible with | e Transmit and receive frequencies are not | ePush the [RIT] switch to turn OFF the func- | p. 15 another station. the same. tion. ® Transmitted signals are | e The mic gain is set too high. ® Rotate the [MIC] contro! counterclockwise to | p. 16 distorted. reduce the gain. eThe displayed frequency | e The dial lock function is activated. ePush the [LOCK] switch to the out position |p. 2 does not change properly. to release the function. e The internal CPU has malfunctioned. e Turn the power OFF. Then turn the power | p. 25 ON again while pushing the [FUNC] and [MW] switches. e Scan does not operate eBoth scan edges are set improperly for | e Reset scan edges. p. 23 properly. Programmed scan. eSame frequencies are memorized in all eProgram different frequencies into memory | p. 22 memory channels for Memory scan. channels. @All programmed memories | © The backup battery is empty. ® Replace the backup battery. p. 25 have been erased. ФАН memory channels are | @ The [LOCK] switch is pushed IN. e Push the [LOCK] switch OUT. p. 22 not displayed. for free by RadioAmateur.eu 8 MAINTENANCE AND ADJUSTMENT 8-7 ADJUSTMENTS Your IC-726 has been thoroughly adjusted and checked at the factory before being shipped. (1) MAIN DIAL BRAKE ADJUSTMENT All adjustable trimmers and coils should be adjusted by an authorized Icom Dealer or Service Center. Your transceiver warranty does not cover problems caused by unauthorized internal adjustments. The tension of the MAIN DIAL may be adjusted to suit your operating requirements. e ADJUSTMENT POSITION 1) The brake adjustment screw is located on the left side of the MAIN DIAL. 2) Turn the brake adjustment screw clockwise or coun- terclockwise to a comfortable tension level while turning the MAIN DIAL continuously and evenly in one direction. (2) HE BAND PA UNIT IDLING CURRENT The PA unit operates with a linear amplifier and requires some idling current to flow through the driver and final transistors to obtain bias voltage. C28, EP21 1) Preparation: [POWER] switch — OFF [MIC] control — Max. counterclockwise [RF PWR] control > Max. counterclockwise Microphone > Disconnect Ammeter > 100 mA range for driver transistors 500 mA range for final transistors 2) Unsolder points indicated by *1 and *2. 3) Properly connect test leads to points. See diagrams for the driver and fina! amp. adjustments. 4) Turn transceiver power ON. 5) Push the [SSB] switch to select LSB or USB mode. 6) Push the [TRANSMIT] switch IN to transmit. 7) Adjust R8 to set 50 mA for the driver amp. Adjust R19 to set 300 mA for the final amp. 8) Turn transceiver power OFF. 9) Re-solder the de-soldered points. for free by RadioAmateur.eu (3) RIT CONTROL MAINTENANCE AND ADJUSTMENT 8 e ADJUSTMENT POSITION 1) Rotate the [RIT] control to the center position and turn OFF the RIT function if it is turned ON. 2} Receive WWV or another signal emitted as a single tone from the speaker while in LSB, USB or CW mode. 3) Push the [RIT] switch to turn ON the RIT function and adjust R70 on the PLL UNIT as shown at left to the same tone pitch as that received. 4) Turn OFF and ON the RIT function to compare two tone pitches and adjust R70 until both tone pitches are the same. (4) SCAN FUNCTION e FRONT PANEL REMOVAL eDIODE INSTALLATION LOCATION (Fig. 7) D20 J 0.7% О: У Insert a diode as shown in the diagram at left. By inserting a silicon diode (sold separately) in the position indicated, the following functions can be changed: | AFTER DIODE DEFAULT MODIFICATION REF. D20 | Scan resume Scan clear p. 23 D21 Faster scan speed Slower scan speed p. 23 Faster scan speed Slower scan speed D22 | with mic with mic p. 3 [UP] /[DOWN] [UP] /[DOWN] 1) Unscrew the 6 screws and remove the front panel from the transceiver body. 2) Diode leads should be bent and cut before inserting them into the P.C. board. 3) Insert a diode. Make sure it is inserted in the proper direction and in the desired position. 4) Solder leads. (5) BFO The BFO adjustment requires an accurate frequency counter (less than +1 ppm). Connect the frequency counter to R266 on the MAIN UNIT. See p. 31 for the exact location. Make the adjustments shown in the table at right in numerical order. MODE | FREQUENCY | ADJUSTMENT 1 | USE 9.01300 MHz C294 2 | СМ | 901060 MHz L83 transmit 3 | LSB 9.01000 MHz L382 4 | Cw 9.00980 MHz Verify receive 5 AM No oscillation | £----- (6) OTHER ADJUSTMENTS See pgs. 31 and 32 for information regarding other adjustments. for free by RadioAmateur.eu 28 ШИ О INSTALLATION OF OPTIONS 9-1 UT-30 PROGRAMMABLE TONE The UT-30 has 38 programmable tones available. ENCODER UNIT 1) Remove top and bottom covers. 2) Remove the Ul-7 AM-FM UNIT from the MAIN UNIT. 3) Remove the protective paper from the back of the _UT-30 to expose the adhesive strip. 4) Instali the unit in the location shown on the MAIN UNIT. See the diagram at left. 5) Connect the 3-pin plug on the UT-30 to J2 on the UI-7. 6) Re-connect the Ul-7 on the MAIN UNIT. 9-2 CW NARROW FILTERS The optional FL-100 and FL-101 CW NARROW FILTERS are available. FL-100 500 Hz/—6 dB FL-101 250 Hz/—6dB 1) Remove the bottom cover. 2) Insert a filter to the proper position. The location is shown in the diagram at left. e The filter works regardless of which direction it is inserted in. 3) Replace the cover. See p. 18 for CW operation. The handle allows you to easily carry and transport the transceiver. Attach the MB-23 as shown in the diagram. NOTE: Supplied screws with the MB-23 CANNOT be used with the 1C-726. Please use the screws supplied in the 1C-726 unpacking to correctly attach the MB-23. 29 for free by RadioAmateur.eu 9-4 CR-64 HIGH-STABILITY CRYSTAL UNIT INSTALLATION OF OPTIONS 9 By replacing the original crystal unit with this unit, the total frequency stability of the transceiver will be improved. CR-64 frequency stability: +0.5 ppm (—30°C ~ +60°C, —22°F ~ +140°F) 1) Remove covers and the PLL UNIT following the disassembly procedures on p. 24: 2) Remove the crystal unit from the P.C. board (PLL UNIT). 3) Unsolder the 4 positions on the P.C. board where the CR-64 will be installed. Use a de-soldering braid. 4) Install the unit flush with the P.C. board and in the proper direction. e For correct installation, symbols on the bottom of the CR-64 must be identically matched with sym- bols on the P.C. board. 5) Bend the unit leads flush with the foil side of the P.C. board and solder them. | 6) Trim the leads even with the solder points. 7) Replace the P.C. board and covers. for free by RadioAmateur.eu 30 ШИ 1О INSIDE VIEWS 10-1 MAIN UNIT 549311} MOJJEU [AQ [PUOHdO 40} aDedS . {ZHW 008106) BSN 9629 [pe 048 (ZHIN O9010'6) L-MI 581 (ZHW 000106} 4S1 287 ‘(pe M OOL OLZY pueg 4H | ‘fpe (1amod MOI) MOL 80Zy (pueq ZHIN OS) "pe MOL L6ZH '1INN Wa-Wv 842 yieauiepun pa18301 Si Q£-1 MN ¡euondo ue Joy aseds INN W3-NV "SUOISIBA UO Bulpuadap 1азир Аеш asnjaid 9AOQL ay] UI UMOUS ззиацоашоэ |еилази| for free by RadioAmateur.eu (uole¡¡e1sul De-1N 12491340 ue 104) Sf (LINN 774 243 uo zır wWOAg) yr [pe AHANISUSS gN E6CH (ИМП 774 э43 чо 5 Г 013) Sf [ре эшп]ол эцозэр!$ МЭ 85СН (a1qeo 1931045 : LINN Vd 41024) КГ (45:19 ИМП Уд WOs4) CLF (Pal : LINN Vd Wold) 5 СГ JEUILUIa} PUNOIS (Pueq JH) 10393uUU09 euualuy/ (pueq ZHIN 06) J0398UU09 euualuy 31 INSIDE VIEWS 10 10-2 PLL UNIT 32 "SUOISI9A UO Bulpuadap Jay Hp Аеш элпзэ!а 2A0qe ay) ul umoys sjueuoduios ¡eusazuy for free by RadioAmateur.eu 'fpe *ba4j yg-yo 18401180 ye 19 (LINN NIVW 843 UO Hf OL) CEL +9-H9 ¡euondo ue 10} aoeds LINN saa (ZLL-ZEOZHG) Алэззеа апхоеа 118 ь mm y 7 . COSTETE LEE ET ELELEE “ "fpe 191U99 1043409 118 88H " ot nr (JOLAHOA LOVE9OH) NdD 801 LINN OSA хизеш 8POIP UOIHPUOS A-19 (LINN NIWIA 842 UO Gr OL) Ctr yaef [011109 8Jowa4 A-I9 Bf Et A tn AMA AN AA MASON na ‘ээцои зпоцим ebueyo o] joelqns eq 4 Aew sjueuodwoo ewos ‘Ayjenb эрелбдп о] 250 O Tl . , , 0 nn FHNEL DE agvzosz 6992252 AVIS I ELO srD zz > | NSZZ10SZ || Av 130 LO £90 „aD BCHZISZ 60 в | YIMOS 48 B9FOSZ 960 Aer? _— MS 9992552 eorzosz | seo 20 набора LINN Wd 291 | wezziasz 8l ie Ge ant Gee oe du = TULIO BErZISZ 050 #4 91009 */, 8110809 aporvsz VZEINSZ q MOS 99Р052 255 690Ф04" $21 620 | zungz thor fro seo zs waits ent 4 938 ; 31038 (0) A-19 #0119 Е (A) | B+ e+ SODA | BOBLINTN PLS WPL pm.) gi! vn "218 THA OSA L I NN Wed | 2x1 хуи | ти лени ZGOPON 2191 uoveoon FE mr 891 8992352 BI9ZIS2 1948+0N 8992252 esrzosz HIPZLDd Y 118 ‘Oy na 920 420 et Sto | дыумноз —Ффыы Ovo 691 es ZRACHZISZ > sd en 347 (X) X) | гл еси ocaso “w10 C Y301A1O | 0131 _ NIVA LO 4181654 $15752 №5 cour ¿ at hs H2EOL 8100509 $21 el si 95 | JENL0P UA 291 | 2 ZOZLNY 24004" 121 иг Чеггби 290 = < 105 zx ворго5е 1191 1451952 | TY IBIZA вси | 990609 Gro | wo] zw во | er 5 ar 924-51 | муз | 295852 20 } } | LL . EXSSSSI Pr? 0992262 9992982 § 220 $20 | HD! \ th IBIZSHA Pi ан | 0131 ++ 447 vxesezosz 2HNGICE OO! + GISH 26: ODA © HNOS | y 22 02'910 THAPIGe 26 MSIE SR: LOIA > esvzosz Zr 0031 НЫ THAbISe Se ~GIGP BL: ZODA À Г IUNYICE OZ À GIE OS : 10DA | 068 09'860 ecrzosz маг PLASE dd EX SAN 397 уч фк уг 61 452 | c'eo | IZ ‘St ‘dt ‘Sto | q 130 > 9021052 SAA d29SraN 621 39v ae E: A CR ewe ee ee E eee GE A O OURS GEM: ee —_ ee OS eee COUR CD ee do HNOS == 6 JH _ 5502052 921 ‘ 3+8 QC — 2х 911152 | zx bLNSE € 0 | € ‘20 . 1 91-12 bla THINGZ ‘be 397 7 aay ro 0 | 3H I 31 ZXO9ML | wensz O£-1a €la 210 ’ 70 UMS | , zx SZLHSZ 397 0 ] 5'0 #802252 P2N5z | vo 220 › © | ух 99551 8^ 60 ue 31v9 any bt ia Ó | QAR Ce ь-ы 2х баб 29-15 +1456 29-13 12209+0Н 82-24 | | pl 'eio 2,113 s10 УЕ 131 , 214 > СА IA | 9552052 | тт . 810 130 1813 | LINN NIVW >> nsw bef 383 1552 7 = N 9 IHNST VE O 261452 H2109dN 2x 09%: 9552752 гоземы A LINN Vd 910 291 ci'ato 610 020 A Inv . —= 4H se ee of MS LIV for free by RadioAmateur.eu m GENERAL e Frequency coverage: Receive 500 kHz ~ 30 MHz 50 MHz ~ 54 MHz Transmit. 160-m band 1.8 ~ 2.0 MHz 80-m band 3.5 ~ 4.0 MHz 40-m band 70 ~ 7.3 MHz 30-m band 10.1 - 10.15 MHz 20-m band 140 ~ 14.35 MHz 17-m band 18.068 ~ 18.168 MHz 15-m band 21.0 ~ 21.45 MHz 12-m band 24.89 ~ 24.99 MHz 10-m band 28.0 ~ 29.7 MHz ~ 54.0 MHz ‘6-m band 50.0 e Modes: SSB (A3J), CW (A1), AM (A3), FM (F3) e Number of memory channels: 26 e Antenna impedance: 50 §2 unbalanced e Usable temperature range: —10°C ~ +60°C (+14°F ~ +140°F) e Frequency stability: Less than +200 Hz up to one hour after power is turned ON. Less than +30 Hz after one hour at +25°C (+77°F). Less than +350 Hz at O°C ~ +50°C (432°F ~ +122°F). e Power supply requirement: 13.8 V DC +15%, negative ground e Current drain (at 13.8 V DC): Receive squelched 13A max. audio output 16A Transmit 20 A _ e Dimensions: 241 (W) x 94(H) x 239(D) mm 9.5(W) x 3.7(H) x 9.4(D) in (Projections not included) e Weight: 4.8 kg (11 Ib) @ TRANSMITTER e Output power: SSB, CW, FM (HF) 100 W max., (50 MHz) 10 W max. AM (HF) 40 W max., (50 MHz) 4 W max. eSpurious emissions: 1.8 — 30 MHz Less than —50 dB 50 — 54 MHZ Less than —60 dB e Carrier suppression: More than 40 dB SPECIFICATIONS 12 MN e Unwanted sideband: More than.50 dB down with 1 kHz AF input e Microphone impedance: 600 {2 @ RECEIVER: e Receive system: SSB, CW, AM Double-conversion superheterodyne FM Triple-conversion superheterodyne e Intermediate frequencies: 151 SSB 70.4515 MHz CW. 70.4506 MHz AM,FM 75.4500 MHz 2nd SSB 9.0115 MHz © CW 9.0106 MHz AM, FM 9.0100 MHz 3rd FM 455 kHz e Sensitivity (preamplifier ON): (1.8 ~ 30 MHz) SSB, CW Less than 0.16 uV for 10 dB S/N AM Less than 2.0 uV for 10 dB S/N (28 ~ 30 MHz) FM Less than 0.5 uV for 12 dB SINAD (50 ~ 54 MHz) SSB, CW Less than 0.13 uV for 10 dB S/N AM Less than 2.0 uV for 10 dB S/N FM Less than 0.3 uV for 12 dB SINAD e FM Squelch sensitivity: Less than 0.3 uV (preamplifier ON) e Selectivity: SSB, CW More than 2.3 kHz/-6 dB Less than 4.0 kHz/-60 dB AM More than 6.0 kHz/-6 dB Less than 20.0 kHz/—40 dB FM More than 15 kHz/—6 dB Less than 30 kHz/ -50 dB e Spurious response rejection: More than 70 dB e Audio output impedance: 8 92 e Audio output power: More than 2.6 W at 10% distortion with an 8 92 load. e RIT variable range: More than +1.2 kHz All stated specifications are subject to change without notice or obligation. " for free by RadioAmateur.eu 13 OPTIONS IC-4KL HF 1kW LINEAR AMPLIFIER* This is an all solid-state 1 kW linear amplifier. The amplifier is separated with the remote controller unit and power amplifier/power supply unit. IC-2KL HF 500 W LINEAR - AMPLIFIER* This is an all solid-state 500 W linear amplifier (including final transistors). IC-AT100/IC-AT500 AUTOMATIC ANTENNA TUNERS* Matches 1C-726 to an antenna system. e Matching impedance 16.7 ~ 150 2 e Input power rating IC-AT100 100 W, IC-AT500 500 W IC-PS30 AC POWER SUPPLY ‘Provides 13.8 V DC output and 25 A maximum. Comes with 3 extra output connectors. PS-55 AC POWER SUPPLY Style and size are matched with the IC-726. Provides 13.8 V DC output and 20 A maximum. AT-150 HF AUTOMATIC ANTENNA TUNER* Style and size are matched with the 10-726. e Matching impedance 16.7 ~ 150 22 e Input power rating 100 W AH-3 HF AUTOMATIC ANTENNA TUNER* Matches IC-726 to an antenna system, especially for portable operation. e Input power rating 150 W SP-7 EXTERNAL SPEAKER An external speaker built for base station operation. SM-8 DESK TOP MICROPHONE UP/DOWN switches included. Can be connected to 2 transceivers. for free by RadioAmateur.eu OPTIONS 1 3 HP-2 COMMUNICATION HEADPHONES Provides clean audio and privacy in noisy environments. MB-23 CARRYING HANDLE Carrying handle for easy portable operation. UT-30 PROGRAMMABLE TONE ENCODER UNIT 38 programmable tones available. CT-16 SATELLITE INTERFACE UNIT CT-17 CI-V LEVEL CONVERTER EX-627 HF AUTOMATIC ANTENNA SELECTOR* Easy tuning for instant satellite communications. For remote transceiver control using a personal computer equipped with an RS-232C output port. You can change operating frequencies, memory channels, etc., with your computer keyboard. When connected to an Icom HF transceiver and up to 7 antennas, the EX-627 automatically selects the antenna for the band on which you are operating. (Manual selec- tion is also possible.) CR-64 HIGH-STABILITY CRYSTAL UNIT Contains a temperature-compensat- ing oven heater and crystal unit for improved frequency stability. e Frequency stability 0.5 ppm at —30°C ~ +60°C (—22° F ~ +140°F) IC-MB5 MOBILE MOUNTING BRACKET ОО = 90 = +00 ue 300 er Transceiver bracket for mobile operation. 9 MHz CW NARROW FILTERS Have good shape factor and provide you with better CW reception. *Products marked with * cannot be used for 50 MHz operation. e FL-100 500 Hz/—6 dB e FL-101 250 Hz/—6 dB for free by RadioAmateur.eu 36 Count on us! > = u ss e A-5072S-1EX-T Downloaded by Icom Inc. Printed in Japan = u: вн Copyright © 1990 by Icom Inc. RadioAmateur.EU 6-9-16, Kamihigashi, Hirano-ku, Osaka 547, Japan ">

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