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DO NOT DISTURB ANY ADJUSTMENTS ON THE BOARDS!
Each board was tested and aligned for optimum performance at the factory. Any change to
these adjustments will degrade the performance of your K3 or prevent its operation
altogether. All user calibrations and adjustments are done in firmware using the front panel
menus. These are described at the appropriate points in the assembly procedures.
DO NOT ADJUST THE TURNS ON ANY TOROIDS!
The position of the turns on the cores of many toroids has been adjusted at the factory to
produce exactly the inductance needed for the circuit to work properly. Any attempt to
adjust their position or to make a coil look “nicer” may seriously degrade circuit
performance.
Also, do not attempt to fix the turns or coils in place with adhesives or other materials.
Those toroids needing support have been fixed at the factory. Adding material to the other
toroids will alter their inductance, again degrading circuit performance.
ESD SENSITIVE!
Observe ESD precautions when handling the circuit boards and whenever you are working
on your K3 with the covers off. Failure to observe ESD precautions may result in your K3
not operating at all, or operating but not meeting normal factory performance
specifications due to damaged components. See page 3 for more information.
RF Board and Chassis
RF Board Description
The RF PCB (Printed Circuit Board) is the heart of the K3 transceiver, both physically and electrically. During
assembly, it serves as an attachment point for other PCBs as well as chassis panels, acting as the glue that holds
things together. During operation, the RF board provides signal routing to and from all modules. For more
information, see Theory of Operation, RF Board, in the K3 Owner’s Manual.
RF Board and Chassis Assembly Procedure
CAUTION
There are components on both sides of the circuit boards. When handling them, be careful not
to damage components on either side by placing the board on top of tools or other objects, or
bumping or crushing the components while mounting parts or installing the boards
Remove the RF board from its anti-static packaging. The top side of the board is the side with the toroid
inductors and relays along with other components, including several connectors along one edge. The edge with
the connectors is the back edge of the board, while the front edge has notches cut in it that will fit around front
panel controls. Locate the six rectangular bare copper pads for the 2D fasteners (see Figure 5). There is one in
each corner of the board and one in the center of each side (see Figure 11 on page 14).
Figure 5. 2D Fastener Location on RF Board.
Install 2D fasteners at the six spaces provided (one at each corner and at the center of each side of the RF
board). Mount the fasteners on the bottom side of the board as shown in Figure 6. Be sure the 2D fasteners are
oriented so the side of each fastener lines up with the edge of the RF board as shown.
Figure 6. Installing 2D Fasteners on RF Board.
10
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CAUTION: To avoid damaging the circuit trace between R74 and the metal ring around the mixer
standoff screw hole, position the lock washer under the screw head with the split facing away from the
trace, then tighten the assembly by turning the standoff while holding the screw and lock washer
stationary. )LJXUH,QVWDOOLQJ0L[HU6WDQGRII
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Note that one standoff is very close to the toroid coils. The standoff may touch the coil. That will not
affect circuit performance. If you wish, you may adjust the position of the coil slightly to avoid contact. )LJXUH,QVWDOOLQJ.%3)6WDQGRIIV
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frequency offset may be QHJDWLYH, indicated by a minus sign (single dash) ahead of the number.
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Note: FL1 is to the right and FL5 is to the left. In the next step you will install the filters
right-to-left on the RF board as well.
POSITION
BANDWIDTH2
FREQ OFFSET3
FL5
FL4
FL3
FL11
FL2
1.
If you’re installing the K-FL3B FM filter, place it in FL1 position since it is the widest bandwidth
filter available.
2.
The bandwidth is shown in the label attached to the filters except the K-FL3B FM filter. Record a
bandwidth of 13 kHz for the K-FL3B FM filter.
3.
All of the optional 8-pole filters have an offset of zero. Note that the 5-pole filters may have a
negative offset, indicated by a minus sign ahead of the number.
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1) Do not use screws longer than 1/4” (6.4 mm) to mount the filters. Use your ruler to
measure the screws before installing them. Longer screws may extend into the optional 8pole filter and destroy it. We strongly recommend you use a 1/4” screw even when installing
the 5-pole filters to reduce the possibility of damaging an 8-pole filter should you change
them later.
2) Do not over-tighten the screws. Too much torque may pull the threaded bushing out of
the bottom of the filter module.
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Failure to establish a solid contact at that point may result in birdies in the receiver.
Throughout the assembly, be sure all chassis screws are tight!
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KANT3 or KAT3, Right Side and Rear Panels
If you purchased a KAT3 with your kit, you did not get a KANT3 board with your kit.
For more information, see the .$17$1'.$7&LUFXLW'HVFULSWLRQ below.
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CAUTION
Later you will apply power to do preliminary testing and calibration before the KRX3 Subreceiver is
installed. Failure to insulate the TMP connector as described above may result in short circuits and
extensive damage to your K3 if it touches a component, solder pad or other exposed circuit points.
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Press Method:
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&$87,21
Do not use inside tooth lock washers where split lock washers are specified. Inside tooth lock
washers are slightly larger and may short nearby circuit pads.
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IMPORTANT!
1. Place the split lock washers between the standoff and board as shown in the figure.
This is important to establish the correct spacing between the board and the front
panel.
2. Note that the two standoffs near the LCD use smaller #2 hardware.
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front cover using small screws. Use the screws specified in each step. Do not over-tighten
these screws. Tighten the screws only to the point where you feel some resistance. It is very
easy to strip the threads, especially the screws holding the LCD cover. If you strip these
threads the only remedy is to obtain a new front panel!
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&$87,21
Do not over-tighten the set screws in the knobs in the following steps or you may crack the
knobs! Use only enough torque to hold the knobs in place.
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CAUTION!
You may damage the encoders while installing the knobs in the next step unless you align
the flats in the knobs with the flats on the shafts as described below.
Press small knobs on the four controls under the left end of the LCD: SHIFT/LOW, HI/WIDTH,
SPEED/MIC and CMP/PWR. These knobs are all the same size and are held in place by a friction spring as
shown in Figure 48. Align the flat in the knob with the flat on each shaft before pressing each knob in place. In
addition to the rotating encoder, each knob has a switch that is actuated by pressing the knob toward the panel.
You will feel the switch action when you press each knob onto the shaft.
If a knob feels very loose, check to see if the metal friction spring insert is in place as
shown below. If not it should be in the bag with the knobs. Slide the spring insert into the
knob and place it on the shaft. Friction will hold it and the knob securely once it is mounted.
Figure 48. Mounting Friction Knobs.
In the same manner, mount the slightly larger friction knob onto the RIT/XIT control in the lower right
corner of the front panel. The RIT/XIT control does not have the switch action of the other four encoders.
Mount the large knob on the VFO A encoder shaft below the LCD as shown in Figure 49. Adjust the
position of the knob against the felt washer to produce the desired amount of drag for smooth movement without
the knob turning too freely. Setting the panel face up and then placing the knob on the shaft so its weight
determines the pressure against the felt usually produces a satisfactory amount of friction. If you want to make
further adjustment and find it too sensitive, try a second felt washer under the knob. An extra felt washer is
included in the kit for this purpose. You can do this after assembly is completed. The finger grip slides off to
provide access to the set screw.
Figure 49. Mounting the VFO A Tuning Knob.
35
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CAUTION: To avoid damaging a circuit trace very close to the metal ring around the screw
hole, position the lock washer under the screw so the split faces away from the trace. Tighten the
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Use a strong light to look between the boards to be sure the connectors are properly mated. Be
especially careful to check the connector near the dual potentiometers. Be sure the pins are
entering the socket and not resting alongside it.
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remove the five screws holding it to the chassis (three on the top lip and two on the bottom),
turn the unit upside down and use a screwdriver in the two pry slots provided as shown in
Figure 63. Do not insert the screwdriver deep enough to strike components on the boards!
Pry each end in short increments until the connectors separate. Either a blade (as shown) or
Phillips screwdriver may be used. Note that you may need to remove the left side panel and
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If you see or smell smoke when applying power, turn the K3 off and remove the power
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The objective is to be certain no bare leads touch the front panel shield when the board
is installed in the next step. Do not add spacers or insulating material between the board
and the front panel shield. It is important for proper shielding of the circuits that the
board sit very close to the front panel shield.
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In the following step it is easy to drop screws and lock washers into the K3. If this happens,
you must find and retrieve the hardware. Failing to do so may cause short circuits and
damage your K3 when power is applied.
Recommend you practice installing the KREF3 board without the screw and washers first
to acquaint yourself with the procedure for inserting it and fitting the connector through
the hole in the front panel shield. You’ll need to do this smoothly to avoid dropping the
hardware. ,QVWDOOWKH.5()ERDUGRQWKHEDFNVLGHRIWKHIURQWSDQHOVKLHOGDVVKRZQLQ)LJXUH7KHERDUGSOXJV
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The objective is to be certain no bare leads touch the front panel shield when the board
is installed in the next step. Do not add spacers or insulating material between the board
and the front panel shield. It is important for proper shielding of the circuits that the
board sit very close to the front panel shield.
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In the following step it is easy to drop screws and lock washers into the K3. If this happens,
you must find and retrieve the hardware. Failing to do so may cause short circuits and
damage your K3 when power is applied.
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Be sure you use split lock washers on the back of the board. Inside tooth lock washers may short
out nearby circuit traces.
Hold the board with the screws and washers in position by lightly pinching the corners of the
board with your thumbs over the screw heads and index fingers holding the split lock washers in
place on the back.
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Loudspeaker
Loudspeaker Description
The built-in loudspeaker is mounted on the top cover. A grill cloth covering the sound holes keeps dust and
debris from falling into the speaker cone. The loudspeaker is equipped with a magnetic shield to avoid unwanted
interaction with nearby circuits.
Loudspeaker Installation Procedure
Locate the top cover and check the inside for any masking tape still covering screw holes. If found, peel it
off.
Mount the chassis stiffening bracket on the underside of the cover as shown in Figure 75. Do not use
washers.
Figure 75. Attaching Chassis Stiffener to Top Cover.
Trim the grill cloth to cover the speaker grill openings and overlap the four holes for the loudspeaker
mounting screws. Mark and cut four holes in the grill cloth for screws to pass through the cloth. The grill cloth
is shown as it must fit after the speaker is mounted in Figure 76. If you install the KPA3 100-watt amplifier, the
stiffener will be attached to the chassis and cannot be removed with the cover. In that case, the grill cloth must
be trimmed as shown so it cannot become trapped between the chassis stiffener and the top cover.
CAUTION!
Failing to install the fiber washers as shown in the next step or over-tightening the screws so
that the speaker mounting flanges are distorted may damage the speaker, causing distorted,
fuzzy sound.
52
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7LJKWHQDOOWHQVFUHZV
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WKHVWLIIHQLQJEDULVVWLOODWWDFKHGWRWKHWRSFRYHUZKHUH\RXPRXQWHGLWWRPHDVXUHWKHVSHDNHUJULOOFORWKIRU
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7KHVFUHZVWKDWKROGWKHWRSFRYHULQSODFHDUHDQLPSRUWDQWSDUWRIWKHVWUXFWXUDOGHVLJQ
WKDWSURYLGHVH[FHOOHQWVWUXFWXUDOULJLGLW\LQVSLWHRILWVOLJKWZHLJKW%HVXUHDOOWKHVFUHZVDUHLQ
SODFHDQGWLJKWZKHQHYHU\RXUHSODFHWKHFRYHURURWKHUSDQHOV
:KHQUHPRYLQJWKHWRSFRYHULQWKHIXWXUHWKHQRUPDOSURFHGXUHLVWRUHPRYHWKHQLQHVFUHZV
RQWRSOHDYLQJWKHVWLIIHQLQJEDURQWKHFKDVVLVVHH)LJXUH,IWKH.3$ZDWWDPSOLILHU
LVLQVWDOOHGWKLVLVWKHRQO\ZD\WKHWRSFRYHUFDQEHUHPRYHGEHFDXVHWKHUHDUVKLHOGLQVWDOOHG
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7KLVFRPSOHWHVWKHDVVHPEO\RI\RXU.7UDQVFHLYHU1H[WSHUIRUPWKH,QLWLDO7HVWDQG&DOLEUDWLRQ
SURFHGXUHVEHORZWRHQVXUH\RXU.LVRSHUDWLQJSURSHUO\2QFHWKH\KDYHEHHQFRPSOHWHG\RXFDQSURFHHGWR
LQVWDOORWKHURSWLRQVLQFOXGLQJWKH.3$ZDWWDPSOLILHUPRGXOHDWDQ\WLPH(DFKRSWLRQLVVXSSOLHGZLWK
LWVRZQLQVWDOODWLRQPDQXDO
3$576/()729(5"
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.7KLVLVQRUPDO([WUDVRISDUWVPRVWHDVLO\ORVWGXULQJDVVHPEO\DUHIUHTXHQWO\LQFOXGHG
7HVWDQG&DOLEUDWLRQ
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EHIRUHLQVWDOOLQJD.3$ZDWWSRZHUDPSOLILHURSWLRQ. +DYH\RXU.2ZQHU¶V0DQXDOKDQG\'HWDLOHGSURFHGXUHVDUHLQ\RXU2ZQHU¶V0DQXDOZKHUH\RXFDQILQG
WKHPHDVLO\LQWKHIXWXUHLI\RXQHHGWKHP
YOUR K3 WILL NOT OPERATE, OR WILL NOT OPERATE CORRECTLY, until
you complete the Test and Calibration procedures below, including:
Synthesizer Calibration.
Filter Setup (all five procedures listed for HDFK filter installed).
Reference Oscillator Calibration. TX Gain Calibration on DOO bands. Using Tap/Hold Switches: 0RVW.VZLWFKHVKDYHWZRIXQFWLRQV7DSSLQJDFWLYDWHVWKHIXQFWLRQODEHOHGRQ
WKHVZLWFK+ROGLQJaVHFDFWLYDWHVWKHIXQFWLRQODEHOHGEHQHDWKWKHVZLWFK
Initial Power Checks
&RQQHFW\RXU9'&QRPLQDO9'&SRZHUVXSSO\WRWKHUHGDQGEODFN9'&,1FRQQHFWRURQ
WKHEDFNRI\RXU.'RQ¶WFRQQHFWDQ\WKLQJHOVHWR\RXUULJXQWLOLQVWUXFWHGWRGRVR
2QWKHIURQWSDQHOWDS P O W E R WRWXUQWKH.RQ7KH/&'GLVSOD\VKRXOGLOOXPLQDWHDVLWGLGEHIRUH,W
ZLOOSUREDEO\VKRZDQHUURUPHVVDJHHJERR PLLRUERR PL17KLVLVQRUPDO,WLVUHSRUWLQJWKDWWKH
V\QWKHVL]HUKDVQRWEHHQFDOLEUDWHG7DS D I S P L AY WRFOHDUWKHHUURUPHVVDJH2WKHUHUURUPHVVDJHVPD\IROORZ
GHSHQGLQJXSRQZKLFKPRGXOHV\RXKDYHLQVWDOOHGLQGLFDWLQJWKDWWKH\KDYHQRWEHHQLQLWLDOL]HG\HW3UHVV
GLVSOD\XQWLO\RXKDYHFOHDUHGWKHHUURUPHVVDJHV
Always turn your K3 off by pressing the P O W E R button. Removing DC power while the K3 is
on can, on rare occasions, result in corrupted data in the EEPROM requiring you to reload the
firmware. Synthesizer Calibration
+ROGC O N F I G WRDFFHVVWKHFRQILJXUDWLRQPHQXWKHQURWDWH9)2%WRGLVSOD\7(&+0'6HWWKH7(&+
0'SDUDPHWHUWR21ZLWK9)2$
5HIHUWRWKHCalibration ProceduresLQ\RX2ZQHU¶V0DQXDODQGSHUIRUPWKHSynthesizerFDOLEUDWLRQ
:KHQWKHFDOLEUDWLRQSURFHVVLVFRPSOHWHGSUHVVWKH%$1'VZLWFKWRF\FOHWKURXJKDOOWKHEDQGVIURP
PHWHUVWKURXJKPHWHUVDQGYHULI\WKDWWKHUHDUHQR&$/3//HUURUPHVVDJHVRQWKHGLVSOD\7KDWLQGLFDWHVWKDW
WKHV\QWKHVL]HULVFDOLEUDWHGRQDOOWKHEDQGV
Filter Setup
7XUQWRWKHCrystal Filter Installation and SetupVHFWLRQRI\RXU2ZQHU¶V0DQXDODQGSHUIRUPWKHIROORZLQJ
SURFHGXUHV,I\RXKDYHLQVWDOOHGVWDQGDUG(OHFUDIWSROHILOWHUV\RXZLOOQHHGWKH)5(42))6(7GDWD\RX
UHFRUGHGHDUOLHURQSDJH
x Filter Bandwidth Setup
x Filter Center Frequency Setup
x Receive Filter Enables
x Filter Loss Compensation
x Transmit Filter Selection
The transmit filter selection setup requires that you select a valid transmit filter for each
mode. If you fail to do so, you will see ERR TXF and have no RF output when you attempt
to transmit.
Reference Oscillator Calibration
7XUQWRWKHCalibration ProceduresReference Oscillator VHFWLRQLQ\RXU2ZQHU¶VPDQXDODQGSHUIRUP
HLWKHURIWKHUHIHUHQFHRVFLOODWRUFDOLEUDWLRQSURFHGXUHVIRXQGWKHUH2QHRIWKHSURFHGXUHVXVHVDQRIIDLUVLJQDO
DQGUHTXLUHVQRH[WHUQDOWHVWHTXLSPHQW
TX Gain Calibration
,I\RXGRQRWKDYHDFRPSXWHUWXUQWRWKHCalibration ProceduresTransmitter GainVHFWLRQLQ\RXU2ZQHU¶V
PDQXDODQGSHUIRUPWKHPDQXDOLow-Power (5W) TX Gain CalibrationSURFHGXUH
Note:,I\RXSHUIRUPWKHPDQXDOSURFHGXUHLQWKH2ZQHU¶VPDQXDOZKHQ\RXSUHVV$17WRVHOHFW$17RU
SUHVV%<3$66WRSXWWKH$78LQE\SDVVPRGHWKHGLVSOD\ZLOOUHDG12$78HYHQLI\RXKDYHLQVWDOOHGWKH
.$7$78PRGXOH,I\RXKDYHWKHLQVWDOOHGWKH.$7$78LWZLOOEHHQDEOHGQH[WVHFWLRQDIWHUWKLV
FDOLEUDWLRQLVGRQH
,I\RXKDYHD:LQGRZV/LQX[RU0DFLQWRVKFRPSXWHUZLWKDQ56LQWHUIDFHDQGFDEOHDQGDQLQWHUQHW
FRQQHFWLRQSHUIRUPWKHDXWRPDWHG7;*DLQFDOLEUDWLRQXVLQJWKH.8WLOLW\SURJUDPDVIROORZV
,QVWDOOWKH(OHFUDIW.8WLOLW\9HURUODWHURQ\RXUFRPSXWHU7KHXWLOLW\LVDYDLODEOHIRU
GRZQORDGLQJIURPWKH(OHFUDIWZHEVLWHZZZHOHFUDIWFRP
&RQQHFW\RXUFRPSXWHUWR\RXU.¶V56SRUWDQGVWDUWWKH.8WLOLW\SURJUDP
&OLFNRQWKH.8WLOLW\³&RQILJXUDWLRQ´WDE³&DOLEUDWH7UDQVPLWWHU*DLQ«´DQGSHUIRUPWKH:DWW
7UDQVPLWWHU*DLQ&DOLEUDWLRQ
Option Modules
Enable Modules
(QDEOHWKH.1%QRLVHEODQNHUDQGLILQVWDOOHGWKH.%3).$7.'95DQG.;9RSWLRQPRGXOHVDV
GHVFULEHGLQWKHOption Module EnablesVHFWLRQRI\RXU2ZQHU¶V0DQXDO(YHQWKRXJKWKH\DUHLQVWDOOHGWKHVH
PRGXOHVZLOOQRWIXQFWLRQXQWLOWKH\DUHHQDEOHG
KPA3 100-Watt Amplifier Installation
,I\RXSXUFKDVHGWKH.3$ZDWWDPSOLILHURSWLRQWXUQWRWKHKPA3 Option Installation Instructions
PDQXDOInstallation ProcedureWRFRPSOHWHLQVWDOODWLRQDQGWHVWLQJQRZ
KRX3 Subreceiver Installation
,I\RXSXUFKDVHGWKH.5;VXEUHFHLYHUWXUQWRWKHKRX3 High-Performance Subreceiver Installation and
OperationPDQXDOWRFRPSOHWHWKHLQVWDOODWLRQ6LQFH\RXKDYHDOUHDG\LQVWDOOHGWKH$X[LOLDU\'63ERDUGEHJLQ
ZLWKWKHVHFWLRQ Checking and Modifying Resistor R91DQGFRQWLQXHRQZLWKDOOWKHVWHSVWRWKHHQGRIWKH
PDQXDO
Other Calibration Procedures
Wattmeter Calibration (Optional)
7KHZDWWPHWHULVUHDVRQDEO\DFFXUDWHDVLWLVVXSSOLHG+RZHYHULI\RXKDYHDQDFFXUDWHH[WHUQDOZDWWPHWHU\RX
FDQDGMXVWWKH.WRPDWFKLWVUHDGLQJVDWORZSRZHUZDWWVKLJKSRZHUZDWWVDQGLI\RXKDYHWKH
.;9PRGXOHLQVWDOOHGDWPLOOLZDWWVRXWSXWDWWKH.;9WUDQVYHUWHULQWHUIDFH5HIHUWRCalibration
Procedures, WattmeterLQ\RXU2ZQHU¶V0DQXDO
S-Meter Calibration (Optional)
7KH6PHWHUFDOLEUDWLRQLVQRUPDOO\TXLWHDFFXUDWHZLWKWKHGHIDXOWVHWWLQJVSURYLGHG,I\RXKDYHDQDFFXUDWH
RKPPLFURYROWVLJQDOJHQHUDWRUVXFKDVWKH(OHFUDIW;*RU;*\RXFDQFDOLEUDWHWKH6PHWHU\RXUVHOI
5HIHUWRCalibration Procedures, S-MeterLQ\RXU2ZQHU¶VPDQXDO
$SSHQGL[$,OOXVWUDWHG3DUWV/LVW
<RXUNLWFRQWDLQVDQXPEHURIHQYHORSHVER[HVDQGSDFNDJHVRISDUWV&KHFNWKHFRQWHQWVRIHDFKRQHFDUHIXOO\
DJDLQVWWKHIROORZLQJOLVWV<RXPD\ILQGH[WUDVFUHZVQXWVDQGRWKHUVPDOOSDUWVSURYLGHGLQFDVH\RXORVHRQH
7KH\PD\EHLQDVHSDUDWHEDJRUPL[HGLQZLWKWKHRWKHUV
Printed Circuit Boards
(DFKERDUGLVSDFNDJHGLQLWVRZQ(6'VDIHEDJLGHQWLILHGE\WKHSDUWQXPEHUVVKRZQEHORZ7KHSKRWRJUDSKV
DUHSURYLGHGWRKHOS\RXLGHQWLI\HDFKERDUG<RXPD\ILQGWKDWVRPHRIWKHFRPSRQHQWVRUFRPSRQHQW
ORFDWLRQVRQWKHERDUGV\RXUHFHLYHDUHVOLJKWO\GLIIHUHQWIURPWKRVHVKRZQ
&$87,21
'2127',6785%$1<$'-8670(176217+(%2$5'6
(DFKERDUGZDVWHVWHGDQGDOLJQHGIRURSWLPXPSHUIRUPDQFHDWWKHIDFWRU\$Q\FKDQJHWRWKHVH
DGMXVWPHQWVZLOOGHJUDGHWKHSHUIRUPDQFHRI\RXU.RUSUHYHQWLWVRSHUDWLRQDOWRJHWKHU$OOXVHU
FDOLEUDWLRQVDQGDGMXVWPHQWVDUHGRQHLQILUPZDUHXVLQJWKHIURQWSDQHOPHQXV7KHVHDUH
GHVFULEHGDWWKHDSSURSULDWHSRLQWVLQWKHDVVHPEO\SURFHGXUHVDQGLQWKH2ZQHU¶V0DQXDO.
ILLUSTRATION
DESCRIPTION
QTY
ELECRAFT
PART NO.
Front Panel Printed Circuit
Board Assembly
1
E850242
1
E850233
ESD Sensitive
K3 DSP Printed Circuit
Board Assembly
ESD Sensitive
$
ILLUSTRATION
DESCRIPTION
QTY
ELECRAFT
PART NO.
1
E850261
1
E850322
1
E850256
1
E850257
RF Board
ESD Sensitive
PA Jumper Block
Assembly (pre-installed on
RF board)
Low Power Amplifier (LPA)
Board
ESD Sensitive.
K3 Mixer Board
ESD Sensitive.
$
ILLUSTRATION
DESCRIPTION
QTY
ELECRAFT
PART NO.
1
E850280
1
E850248
1
E850254
KNB3 Noise Blanker
Board
ESD Sensitive.
KANT3 Antenna Input
Module
Notes:
1)This board is not supplied if you
purchased the KAT3 automatic
antenna tuner option with your K3
kit.
2) Due to design changes, L3
may not be present. (You may
see clipped leads where it was
removed. That is normal,) Also,
on some boards C6 and C5 may
not be present.
KREF3 Board
ESD Sensitive.
$
ILLUSTRATION
DESCRIPTION
QTY
ELECRAFT
PART NO.
1
E850260
1
E850237
1
E850236
KSYN3 Board
ESD Sensitive
KIO3 Main Board
ESD Sensitive.
KIO3 Audio I/O Module
ESD Sensitive.
$
ILLUSTRATION
DESCRIPTION
QTY
ELECRAFT
PART NO.
KIO3 Remote (Digital) I/O
Module
1
E850235
QTY
ELECRAFT
PART NO.
Front Panel
1
E100209SS
Left Side Panel
1
E100210
Right Side Panel
1
E100211
Top Cover
1
E100212
ESD Sensitive.
E850262 Enclosure
ILLUSTRATION
DESCRIPTION
$
ILLUSTRATION
QTY
ELECRAFT
PART NO.
Bottom Cover A
1
E100213
Bottom Cover B
1
E100221
Rear Panel
1
E100214SS
1
E850297
1
E850296
Front Panel Shield
1
E100216
Chassis Stiffener
1
E100222
KIO3 Panel
1
E850315
Loudspeaker with attached
wire and connector
1
E850300
Loudspeaker Shield
1
E980087
DESCRIPTION
Panel, Blank (KPA3 Fans)
Note: This part is not supplied if
you purchased the KPA 100 watt
amplifier option with your K3 kit.
Panel, Blank (KXV3 I/O)
Note: This part is not supplied if
you purchased the KXV3 I/O
option with your K3 kit.
$
E850239 K3 FP Encoder Assembly Bag
ILLUSTRATION
DESCRIPTION
Encoder Assembly
QTY
ELECRAFT
PART NO.
2
E850239
E850249 I.F. Crystal Filter Bag (or Box)
127(,IWKHRSWLRQDOSROH.ILOWHULVSXUFKDVHGLQVWHDGVHHQH[WLWHPWKLVILOWHULVQRWVXSSOLHG
ILLUSTRATION
DESCRIPTION
QTY
ELECRAFT
PART NO.
1
E850249
KFL3A-2.7K Filter
or
RU
Note: This filter is not supplied if you
purchased the optional 8-pole 2.8 kHz
filter with your K3 kit.
Screw, 4-40, either 1/4” (6.4 mm) Zinc,
Pan Head or 3/16” (4.8 mm), Pan Head
screw.
1
Lock Washer, #4, Inside Tooth or Split
Ring
1
E700005 or
E700015
E700010 or
E700004
E850249 I.F. Crystal Filter Bag (or Box)
237,211RWVXSSOLHGXQOHVVRUGHUHG2WKHUZLVHWKHVWDQGDUGSROHILOWHUDERYHLVVXSSOLHG
DESCRIPTION
QTY
ELECRAFT
PART NO.
KFL3A-2.8K Filter (optional, see above)
1
E850249
Screw, 4-40, either 1/4” (6.4 mm) Zinc,
Pan Head or 3/16” (4.8 mm), Pan Head
screw.
1
Lock Washer, #4, Inside Tooth or Split
Ring
1
ILLUSTRATION
or
See Note in Description
RU
$
E700005 or
E700015
E700010 or
E700004
KREF3 TCXO Module Bag
QTY
ELECRAFT
PART NO.
1
E660033
KREF3 TCXO Module, 49.380 MHz,
(optional) 1 ppm stability (includes
temperature compensation data sheet).
1
E660034
TCXO spacer (supplied only with
optional KTCXO3-1 module)
1
E980146
Tie Wrap, KREF3 TCXO. Module
1
E980145
QTY
ELECRAFT
PART NO.
Bezel (LCD cover), K3
1
E100195
Trim Panel, K3 VFO
1
E100197
Serial Number Label
1
E980137
ILLUSTRATION
DESCRIPTION
KREF3 TCXO Module, 49.380 MHz,
5 ppm stability
Note: This module is not supplied if you
purchased the optional 1 ppm module with your
kit.
Rectangular Insulator the size of the TCXO
E850307 K3 Front Panel Bezels and Serial Number Label
ILLUSTRATION
DESCRIPTION
$
E850229 SO239 Ant Connector Assembly Bag
1RWH,I\RXSXUFKDVHGWKH.$7$XWRPDWLF$QWHQQD7XQHU\RXUNLWZLOOLQFOXGHWZRRIWKHVHEDJV
QTY
ELECRAFT
PART NO.
SO239 (UHF) Female Panel Mount
Connector with cable
1
E850229
Screw, 4-40, 1/4” (6.4 mm) Black, Pan
Head
2
E700009
Lock Washer, #4, Inside Tooth
2
E700010
Nut, 4-40
2
E700011
QTY
ELECRAFT
PART NO.
Screw, 4-40, 1/4” (6.4 mm) Black, Pan
Head
4
E700009
Screw, 4-40, 1/4” (6.4 mm) Zinc, Pan
Head
2
E700005
Lock Washer, #4, Inside Tooth
2
E700010
Jackscrew Nut, 4-40
Note: Two of the jackscrew nuts may be
mounted on the DB-9 connector on the
Remote I/O Board.
4
E700078
Standoff, 4-40, 1-1/4” (31.8 mm) long
2
E700119
ILLUSTRATION
DESCRIPTION
E850238 KIO3A Hardware Bag
ILLUSTRATION
DESCRIPTION
$
E850263 K3 Miscellaneous Bag
QTY
ELECRAFT
PART NO.
TMP Cables
3
E100282
Battery BT1 (CR2032)
1
E850058
Loudspeaker Grill Cloth
1
E850089
#4 Fiber Washer
4
E700031
Bottom Feet with tilt stand
1
E980098
SO239 Hole Cover
1
E980135
BNC Hole Cover
2
E980136
Thumbscrew, #6
1
E700070
2D Fastener
10
E100078
Standoff, 4-40, 1/4” (6.4 mm) long
6
E700026
Standoff, 4-40, 3/8” (9.5 mm) long
2
E700153
Standoff, 4-40, 1/2” (13 mm) long
3
E700061
ILLUSTRATION
DESCRIPTION
Front Feet with Stand
Rear Feet
Typical Standoffs
(May be round or hexagonal)
$
DESCRIPTION
QTY
ELECRAFT
PART NO.
Screw, 4-40, 3/16” (4.8 mm) Black, Flat
Head
27
E700025
Screw, 4-40, 3/8” (9.5 mm) Black, Flat
Head
6
E700131
Screw, 4-40, 1/2” (13 mm) Black, Flat
Head
1
E700132
Screw, 4-40, 3/16” (4.8 mm), Black, Pan
Head
38
E700015
Screw, 4-40, 1/4” (6.4 mm) Zinc, Pan
Head
22
E700005
Screw, 4-40, 1/4” (6.4 mm) Black, Pan
Head
3
E700009
Screw, 4-40, 7/16” (11 mm) Zinc, Pan
Head
7
E700032
Lock Washer #4, Split
40
E700004
Lock Washer, #4, Inside Tooth
23
E700010
Nut, 4-40
15
E700011
Washer, Flat, #6
2
E700067
Grommet Bumper, 7/16” Round (Side
panel feet)
4
E980141
Allen Wrench, 5/64” (in envelope)
1
E980004
Allen Wrench, .050” (in envelope
1
E980008
ILLUSTRATION
Typical Pan Head Screws
Black
Zinc
$
E850241 Front Panel Hardware Bag
QTY
ELECRAFT
PART NO.
Felt Washer
3
E700033
Knurled Nut (Phones Jack)
1
E700138
Standoff, 2/56, 5/16” (7.9 mm) long
2
E700122
Standoff, 4-40, 5/16” (7.9 mm) long
2
E700121
Standoff, 4-40, 5/8” (15.9 mm) long
3
E700003
Standoff, Nylon, 5/8” (15.9 mm) long
1
E700163
Screw, 4-40, 3/16” (4.8 mm) Black, Flat
Head
2
E700025
Screw, 2-56, 5/32” (4.0 mm) Black, Pan
head (See Note Below)
4
E700149
Screw, 2-56, 1/4” (6.4 mm) Black, Pan
Head (See Note Below)
4
E700124
Screw, 4-40, 1/4” (6.4 mm) Zinc, Pan
Head
7
E700005
Lock Washer, #2, Split
2
E700123
Lock Washer #4 Split
9
E700004
Nut, 1/2” (13 mm) Hex
6
E700125
Lock Washer, 1/2” (13 mm) Inside
Tooth
5
E700150
Washer, Flat, Phones Jack Spacer
1
E700145
Front Panel Light Blocker (2 strips in
envelope)
1
E850324
ILLUSTRATION
DESCRIPTION
Typical Standoffs
(Soft Foam Strips)
Note:7KHEODFNSDQKHDGVFUHZVDUHVXSSOLHGLQVHSDUDWHHQYHORSHV'RQRWPL[WKHPXS<RX
ZLOOEHLQVWUXFWHGZKHQWRXVHHDFKVL]HVFUHZLQWKHDVVHPEO\SURFHGXUH8VLQJWKHZURQJVFUHZPD\
GHVWUR\\RXUIURQWSDQHOFLUFXLWERDUG
$
E850308 K3 Knobs for Front Panel
QTY
ELECRAFT
PART NO.
Knob, VFO B Tuning
1
E980090
Knob, RIT/XIT
1
E980089
Knob, Concentric Shaft, Large
2
E980092
Knob, Concentric Shaft, Small
2
E980091
Knob, Small Encoder Shaft
4
E980088
QTY
ELECRAFT
PART NO.
Knob, VFO A Tuning
1
E980093
Finger Grip, Main VFO Tuning Knob
1
E980094
ILLUSTRATION
DESCRIPTION
E850306 K3 Knobs and Band for VFO A
ILLUSTRATION
DESCRIPTION
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E850316 Carrying Handle Bag
DESCRIPTION
QTY
ELECRAFT
PART NO.
Handle (strap, spring insert and two end
caps)
1
E850317
Screw, 6-32, 1/2” (13 mm), Black, Pan
Head (in envelope)
2
E700042
Lock Washer, #6, Split (in envelope)
2
E700041
Nut, 6-32 (in envelope)
2
E700069
ILLUSTRATION
E850301 Power Cable Kit
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$