Headphone Amplifier Evaluation Board

Headphone Amplifier Evaluation Board
Three Decades of Quality Through Innovation
Linear Integrated Systems
Headphone Amplifier
Evaluation Board
By Dimitri Danyuk
Linear Integrated Systems • 4042 Clipper Court • Fremont, CA 94538 • Tel: 510 490-9160 • Fax: 510 353-0261 • Email: sales@linearsystems.com
Linear Integrated Systems headphone amplifier evaluation board Dimitri Danyuk Contents 1 1.1 1.2 1.3 2 2.1 2.2 3 4 5 6 6.1 6.2 6.3 Introduction Features Description Specifications Operation Precautions Quick start list for evaluation board Circuit description Measurements References Documents Linear Integrated Systems headphone amplifier evaluation board schematic diagram Linear Integrated Systems headphone amplifier evaluation board parts list Linear Integrated Systems headphone amplifier evaluation board PCB Layers 1 1 1 2 2 2 2 3 4 8 9 1 Introduction 1.1 Features Linear Integrated Systems headphone amplifier evaluation board includes the following features: Stereo, single‐ended input and single‐ended output 400 mW output power into 100Ω Wide frequency response (10Hz‐200kHz; ‐1dB) Voltage gain 5 (14dB) Low distortion (THD+N is less than 1% at 10Hz‐20kHz at 5Vrms into 100Ω and less than 0.1% from 10 Hz to 20 kHz at 1Vrms into 100Ω load) Short‐circuit protection Pop reduction (slow start) circuit Defeatable cross‐feed circuit Volume control Overvoltage and reverse polarity power protection Audio input and output connections: left and right RCA phono jack inputs, ¼” stereo phone jack output External 9V–16V supply input External power supply connector: power jack, inside diameter 2.1mm, outside diameter 5.5mm 1.2 Description • 4042 Clipper Court • Fremont, CA 94538 • Tel: 510 490‐9160 • Fax: 510 353‐0261 Page 2 of 10 Linear Integrated Systems headphone amplifier evaluation board is a complete, low‐power stereo audio amplifier for high‐fidelity line‐level output and headphone applications. It consists of Linear Integrated Systems JFETs along with a number of other parts mounted on a circuit board (Fig 1). 1.3 Specifications Supply voltage range Supply current Continuous output power, 100Ω load Audio input voltage Minimum load impedance Maximum output current 9V to 16V 380mA typ, 850mA max (12V) 400 mW/ch, THD+N < 1% 1.3 Vrms, max 100 Ω 55 mA rms 2 Operation 2.1 Precautions Power supply polarity and maximum voltage Always ensure that the polarity and voltage of the external power connected to power jack J1 is correct. Overvoltage or reverse‐polarity power applied to J1 may damage onboard transient voltage suppression (TVS) diode, onboard DC‐DC converter and cause damage to the power source. Please note that onboard DC‐DC converter has overvoltage protection, amplifier is not powered, if the power source voltage is greater than 16V. 2.2 Quick start list for evaluation board 1) Select and connect a 9V–16V power source to a power jack J1 2) Ensure that signal source level is set to minimum 3) Connect the audio source to left and right RCA phono jacks J2 and J4 4) Connect the load (headphones) to headphone jack J3. 5) Verify correct voltage and input polarity according to the silkscreen placed near J1 and set the external power supply to ON. On‐board LEDs (D3,D8,D103,D108) light indicate the presence of power 6) Adjust the signal source level as needed with volume potentiometer (R139) 7) Enable cross‐feed circuit by pressing switch SW1 • 4042 Clipper Court • Fremont, CA 94538 • Tel: 510 490‐9160 • Fax: 510 353‐0261 Page 3 of 10 Fig 1 Linear Integrated Systems headphone amplifier evaluation board connections 3 Circuit description The input stage is a complementary differential JFET stage, based on LSK489 and LSJ689 (U1 and U2). This topology is popular for audio amplifier design (Refs 1‐3). Each of these JFETs is working with 4mA drain current. Dual differential JFET input stage can handle fairly large input signals with low distortion. The input stage is loaded with complementary common gate stage, based on LSK170 and LSJ74 (Q12 and Q2). Complementary common gate stage operates at 5mA and provides single ended drive to the output stage. Output stage is a complementary source follower and consists of three LSK170 (Q3‐Q5) and three LSJ74 (Q8‐Q10). Output devices operate at 10mA each and have large copper pads for heat dissipation. Three JFET pairs in parallel allow driving loads up to 100Ω. Limiter diodes D4 and D7 prevent excessive source current in the output devices when the output of the amplifier is shorted. Gate resistors (R10‐R12, R35‐37) prevent parasitic oscillation in the output stage. • 4042 Clipper Court • Fremont, CA 94538 • Tel: 510 490‐9160 • Fax: 510 353‐0261 Page 4 of 10 Amplifier has open loop gain of 48dB with the cutoff frequency equal to 16kHz. The open loop gain determined by transconductance of the input stage and the common gate stage output impedance. Open loop cutoff frequency determined by the common gate stage output impedance and input capacitance of the output complementary follower. Close loop gain equal to 20dB. R34 isolates the output of complementary source follower from capacitive load; C18 removes overshoot on the output square wave with capacitive loads. Operational amplifier U3 with bipolar junction transistors Q6 and Q7 form a servo circuit, which maintains zero dc offset on the output terminal. Time constant of the servo circuit is about 1 sec. Amplifier has switchable passive cross‐feed circuit (R156‐R162, C132, C133) (Refs. 4,5). Cross‐feed helps to reduce listening fatigue caused by the unnatural stereo image localization, provided by headphones. Cross‐feed circuit can be disabled by switch SW1 without change in the amplifier output voltage. Passive cross‐feed circuit adds 6dB attenuation to the input signal. Onboard switch mode power supply provides bipolar 24V dc power to MOSFET ripple filters (Q117, Q118). Ripple filters supply left and right channels with bipolar 20V dc, perform slow start and allow using considerable value electrolytic capacitors across the rails. Input of the onboard switch mode power supply is protected with TVS diode D110. External power is galvanically isolated from amplifier circuit. 4 Measurements Fig.2 Closed‐loop gain for Linear Integrated Systems headphone amplifier as a function of frequency. Cross‐feed circuit is disabled (R158=R160=0) • 4042 Clipper Court • Fremont, CA 94538 • Tel: 510 490‐9160 • Fax: 510 353‐0261 Page 5 of 10 Fig.3 Closed‐loop phase as a function of frequency. Cross‐feed circuit is disabled (R158=R160=0). The headphone preamplifier offers wide bandwidth (Fig.2, Fig.3). At 200kHz the frequency response is down by 1dB and phase shift is ‐30°. Fig.4 Cross‐feed circuit frequency response Fig.4 shows the frequency response for the crossfeed‐signal (from Right input to Left output) as well as the direct audio signal (from Left input to Left output). The amplitude of the crossfeed‐signal decreases with frequency, and thus mimics the shadowing effect of the head at higher frequencies. • 4042 Clipper Court • Fremont, CA 94538 • Tel: 510 490‐9160 • Fax: 510 353‐0261 Page 6 of 10 Fig.5 Output impedance of Linear Integrated Systems headphone amplifier as a function of frequency. Output current 10mA The output impedance (Fig.5) is below 1.5Ω at low and middle frequencies, rising slightly to just under 2.5Ω at the top of the audio band. Fig.6 Total harmonic distortion plus noise (THD+N) for Linear Integrated Systems headphone amplifier as a function of output voltage. • 4042 Clipper Court • Fremont, CA 94538 • Tel: 510 490‐9160 • Fax: 510 353‐0261 Page 7 of 10 Figs. 6 plots how the percentage of THD+N in the headphone amplifier output changes into 100Ω, 300Ω and 2kΩ load. The clipping level exceeds 10V rms for 300Ω and 2kΩ. For 100Ω load clipping level is above 7V rms. The increase in distortion into lower impedances caused by limiting of the output current by internal short circuit protection. There is a weak dependance betwenn THD+N and the load impedance. Fig.7 Total harmonic distortion plus noise (THD+N) for Linear Integrated Systems headphone amplifier as a function of frequency Fig.7 plots the THD+N percentage against frequency at 1V rms and 5Vrms output. The THD+N rises slightly at the top of the audioband at 5V rms outout • 4042 Clipper Court • Fremont, CA 94538 • Tel: 510 490‐9160 • Fax: 510 353‐0261 Page 8 of 10 Fig.8 Individual harmonic levels for Linear Integrated Systems headphone amplifier as a function of output voltage. Load 100Ω. At low output, the distortion is primarily the second harmonic (Fig. 8), at high output levels this is joined by third harmonic at 10dB less level. Higher order products are regularly distributed. Levels of the fourth and fifth harmonic are at least 20dB less than the level of third. Sixth and seventh harmonic levels are about 100dB less than fundamental. 5 References 1 J.Curl, “JC‐2 Preamplifier”, The Audio Amateur, 1977, No 3, p.48 2 J.Curl, “JC‐3 Power Amplifier”, The Audio Amateur, 1981, No 2, p.56, reprinted in Electronics World, April 2000, p.342 3 E.Borbely, "Starter Kits: EB‐604/410 All‐JFET Line Amp", AudioXpress, March 2005, pp.9‐15. 4 D.Danyuk, “Adjustable Crossfeed Circuit for Headphones,” Electronics World, August 2005, p.46 5 “F5‐HA Discrete All FET Class A Headphone Amplifier”, http://xen‐audio.com/documents/f5ha/F5‐
HA%20Description%20V1.4.pdf retrieved on 09/01/2016 Related documentation from Linear Integrated Systems: LSJ74, SST74 ULTRA LOW NOISE SINGLE P‐CHANNEL JFET, datasheet, www.linearsystems.com/assets/media/file/datasheets/LSJ74_SST74.pdf retrieved on 09/01/2016 LSK170 ULTRA LOW NOISE SINGLE N‐CHANNEL JFET AMPLIFIER, datasheet, www.linearsystems.com/assets/media/file/datasheets/LSK170.pdf retrieved on 09/01/2016 LSK489 LOW NOISE LOW CAPACITANCE MONOLITHIC DUAL N‐CHANNEL JFET AMPLIFIER, datasheet, www.linearsystems.com/assets/media/file/datasheets/LSK489.pdf retrieved on 09/01/2016 LSJ689 LOW NOISE LOW CAPACITANCE MONOLITHIC DUAL P‐CHANNEL JFET AMPLIFIER, datasheet, www.linearsystems.com/assets/media/file/datasheets/lsj689part.pdf retrieved on 09/01/2016 retrieved on 09/01/2016 LSK489 Ultra Low Noise JFET, application note, www.linearsystems.com/assets/media/application_notes/LSK489_Application_Note.pdf retrieved on 09/01/2016 LSJ689 Low‐capacitance, monolithic dual P‐Channel JFET, application note, www.linearsystems.com/assets/media/application_notes/app_note_lsj689.pdf retrieved on 09/01/2016 6 Documents 6.1 Linear Integrated Systems headphone amplifier evaluation board schematic diagram • 4042 Clipper Court • Fremont, CA 94538 • Tel: 510 490‐9160 • Fax: 510 353‐0261 Page 9 of 10 See attachment 6.2 Linear Integrated Systems headphone amplifier evaluation board parts list See attachment 6.3 Linear Integrated Systems headphone amplifier evaluation board PCB Layers The following illustrations portray the Linear Integrated Systems headphone amplifier evaluation board silkscreen, top and bottom layers. These illustrations are not to scale. Gerber files can be obtained from Linear Integrated Systems sales office. Fig.9 Linear Integrated Systems headphone amplifier evaluation board silkscreen • 4042 Clipper Court • Fremont, CA 94538 • Tel: 510 490‐9160 • Fax: 510 353‐0261 Page 10 of 10 Fig.10 Linear Integrated Systems headphone amplifier evaluation board top layer Fig.11 Linear Integrated Systems headphone amplifier evaluation board bottom layer • 4042 Clipper Court • Fremont, CA 94538 • Tel: 510 490‐9160 • Fax: 510 353‐0261 A
B
C
D
LIN
5
R22
20k
100
R41
GND
+
C20
10u/100V
+
2
1
4
3.5mA
R63
100k
GND
3
Q15 1
C21
33n
8
DNP(SST74)
GND
GND
2
3
Q13
D3
33n
C1
GRN
GND
DNP(LSK170)
10u/100V
C3
6
5
1
2
D8
GRN
LSJ689
U2B
R32
100
R19
100
R25
LSJ689
U2A
51
U1A
U1B
LSK489 LSK489
U1
dissipation
150 mW
1.9 V
2
1
5
6
R49
270
4
R33
100
R20
100
8
8 mA
R6
270
3
3
4
GND
2
1 Q16
DNP(SST74)
2
1
Q14
DNP(LSK170)
R45
200
DNP
R46
1
3
Q12
LSK170C 2
3
DNP
C24
DNP
C19
DNP
R8
2
1
GND
R23
10
C23
33n
GND
C13
DNP
C9
DNP
GND
100p
C18
SST74B
Q2
GND
33n
C2
R44
10
R35
10
R10
2k
2
Q8
SST74B
Q3
LSK170C
3
GND
3
3
1
2
1
GND
Open loop gain 48 dB
Open loop -3dB cutoff 16 kHz
THDN open loop 0.2 % 1 V output
Close loop gain 20 dB
R38
DNP
RED
D7
D4
RED
R9
DNP
3
C15
33n
10
R36
R26
20
R13
20
10
R11
C6
33n
2
Q9
SST74B
Q4
LSK170C
3
GND
+
C16
33n
10
R37
R27
20
R14
20
10
R12
C7
33n
2
2
GND
3
Q10
SST74B 1
Q5
LSK170C
3
1
C8
33n
C17
33n
R28
20
R15
20
C22 +
330u/25V
GND
-20VL
6...10 mA
GND
0.5"x0.5" copper pad for Q8-Q10 pins 2,4
GND
3
1
2
1
GND
0.5"x0.5" copper pad for Q3-Q5 pin 3
330u/25V
C4
+20VL
2
D5
R21
1M
+15VL
DNP
LOUT
R34
5.1
2
-15VL
GND
BAT54S
D6
C11
1u
+15VL
Date:
40 mA
1
1k
+20VL
GND
LSK489 LSJ689 EVB Left channel
Saturday, September 10, 2016
1u
C12
Q7
FJV992
1
1
Q6
FJV1845
-20V
+20V
1
3
2
2
3
1k
R40
GND
Sheet
1
of
3
Rev
C
Tel: 510 490-9160 Fax: 510 353-0261
D2
BZX84C15
R3
1k
R24
R4 5.1
R1 5.1
C34
DNP
4042 Clipper Court Fremont, CA 94538
GND
Size
Document Number
Custom<Doc>
Title
R2
1k
33n
C14
U3
AD8510
6
33n
GND
GND
-20VL
+20VL
C10
-20VL
-15VL
-15VL
R39
1M
2 -
3 +
D1
BZX84C15
GND
+15VL
7
1
4
8
4
1
3
5
3
1
A
B
C
D
A
B
C
D
RIN
5
R122
20k
100
Q113
2
1
+
GND
GND
R163
100k
Q115
GND
3
1
DNP(SST74)
2
C120
10u/100V
R141
GND
C121
33n
8
4
33n
C101
DNP(LSK170)
GND
3
10u/100V
C103
+
6
5
1
2
D108
GRN
LSJ689
U102B
R132
100
LSJ689
U102A
51
R119
100
R125
U101A
U101B
LSK489 LSK489
GRN
D103
2
1
5
6
R149
270
4
R133
100
R120
100
8
R106
270
3
3
4
Q116
1
GND
2
DNP(SST74)
2
1
Q114
DNP(LSK170)
DNP
C124
DNP
C119
R145
200
1
3
Q112
LSK170C 2
3
DNP
R146
DNP
R108
2
1
GND
R123
10
C113
DNP
C123
33n
GND
100p
C109
DNP
GND
C118
SST74B
Q102
GND
33n
C102
R138
DNP
RED
D107
RED
D104
R109
DNP
2k
R144
10
R135
10
R110
2
3
Q108
SST74B
Q103
LSK170C
3
3
10
R111
C106
33n
C115
33n
10
R136
R126
20
R113
20
GND
3
1
2
1
GND
2
Q109
SST74B
Q104
LSK170C
3
GND
3
1
2
1
GND
3
GND
2
GND
3
Q110
SST74B 1
2
1
GND
GND
+
Q105
LSK170C
C122 +
330u/25V
C116
33n
10
R137
R127
20
R114
20
10
R112
C107
33n
330u/25V
C104
C117
33n
R128
20
R115
20
C108
33n
-20VR
+20VR
R121
1M
2
-15VR
D105
+15VR
DNP
ROUT
R134
5.1
2
GND
BAT54S
D106
C111
1u
R102
1k
+15VR
Date:
GND
1u
C112
Q107
FJV992
1
1
1
3
2
2
3
1k
R140
GND
Sheet
2
of
3
Rev
C
Tel: 510 490-9160 Fax: 510 353-0261
D102
BZX84C15
LSK489 LSJ689 EVB Right channel
Friday, September 09, 2016
-20V
+20V
Q106
FJV1845
5.1
R103
1k
+20VR
C134
DNP
1k
R124
R104
4042 Clipper Court Fremont, CA 94538
GND
Size
Document Number
Custom<Doc>
Title
33n
C114
U103
AD8510
6
33n
1
R101 5.1
GND
GND
-20VR
+20VR
C110
-20VR
-15VR
-15VR
R139
1M
2 -
3 +
D101
BZX84C15
GND
+15VR
7
1
4
8
4
1
3
5
3
1
A
B
C
D
A
B
C
D
5
5
+12V
1
3
2
J2
DNP
GND
RIGHT CH
GND
PJRAN1X1U03X (RED)
2
3
1
J4
LEFT CH
4
R161
5.1k
5.1k
R156
GND
R42
DNP
470u/25V
C127
+
C135
D110
PJRAN1X1U02X (WHITE)
2
3
1
12V 380mA
-12V
J1
PJ-202A
SMA6T22AY
U104
JCE0612D24
4
23
22
16
14
+Vin2
+Vin1
Com2
+Vout
10k
R158
GND
R162
C133
47n 33k
R160
10k
C&K PN22SJNA03QE
SW1
SW SLIDE-DPDT
GND
R157
C131
22u/100V
C126
22u/100V
47n 33k
C132
-Vin1
-Vin2
Com1
-Vout
2
3
9
11
+
+
Crossfeed
Enable/Disable
GND
3 2 1
4 5 6
GND
R155
20k
R153
DNP
R152
DNP
R150
20k
C129
100u/25V
+
3
100
R154
100
R151
GND
GND
RIN
LIN
+
+
C130
330u/25V
330u/25V
C125
Q117 IRF710
Q118 IRF9610
PTD902-1025K-A103
R159
MMBD7000
D111
C128
+
100u/25V
MMBD7000
D109
3
-20V
GND
+20V
5
2
3
6
1
4
J2
GND
2
LOUT
ROUT
GND
J4
GND
SW1
Right Channel
Left Channel
GND
1
Amphenol ACJS-MHDR
(Mouser)
ACJS-MHDR
J3
C27
DNP
1
GND
C26
DNP
MH2
MH
C25
0.1u
MH4
MH
MH3
MH
1
MH1
MH
2
1
C28
DNP
R159
Date:
Monday, September 12, 2016
1
Sheet
3
of
3
Rev
C
Tel: 510 490-9160 Fax: 510 353-0261
LSK489 LSJ689 EVB Power Supply, Connectors
Size
Document Number
Custom<Doc>
Title
J1
4042 Clipper Court Fremont, CA 94538
J3
Power Supply
1
A
B
C
D
24
4
6
23
4
2
1
2
1
2
2
4
4
4
2
2
2
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Part
10u/100V
D110
D109,D111
D5,D105
D6,D106
D4,D7,D104,D107
D1,D2,D101,D102
D3,D8,D103,D108
C132,C133
C128,C129
C127
C126,C131
C25
C18,C118
SMA6T22AY
MMBD7000
DNP
BAT54S
RED
BZX84C15
GRN
47n
100u/25V
470u/25V
22u/100V
0.1u
100p
C4,C22,C104,C122,C125 330u/25V
,C130
R8,R9,C9,C13,C19,C24, DNP
C26,C27,C28,C34,R38,R
46,R108,R109,C109,C11
3,C119,C124,C134,R138
,R146,R152,R153
C11,C12,C111,C112
1u
C3,C20,C103,C120
C1,C2,C6,C7,C8,C10,C1 33n
4,C15,C16,C17,C21,C23,
C101,C102,C106,C107,C
108,C110,C114,C115,C1
16,C117,C121,C123
Quantity Reference
Item
Bill Of Materials LSK489 LSJ689 EVB Revised: Friday, September 09, 2016
Revision: C
0.033µF 100V Ceramic Capacitor C0G
Description
1µF 100V Ceramic Capacitor X7R
Distributor Part Number (Digikey, Mouser )
UFG1E331MPM1TD UFG2A100MPM1TD
497‐10939‐1‐ND MMBD7000LT3GOSCT‐ND BAT54SLT1GOSCT‐ND
160‐1427‐1‐ND BZX84C15LT1GOSCT‐ND
160‐1423‐1‐ND 445‐172673‐1‐ND
493‐1937‐ND
493‐10998‐1‐ND
493‐3193‐ND
445‐1418‐1‐ND
445‐6951‐1‐ND
445‐4468‐1‐ND
493‐10914‐1‐ND
493‐10867‐1‐ND C3216C0G2A333J160AA 445‐15415‐6‐ND Manufacturer Part Number C3216X7R2A105M160A
A
805
100pF 100V Ceramic Capacitor C0G CGA4C2C0G2A101J060
AA 805
0.10µF 100V Ceramic Capacitor X7R C2012X7R2A104K125A
A
CPCYL1/D.325/LS.125/.034 22µF 100V Aluminum Capacitor UKZ1H220MPM Radial
CPCYL1/D.400/LS.200/.034 470µF 25V Aluminum Capacitor UFW1E471MPD1TD
Radial
CPCYL1/D.325/LS.125/.034 100µF 25V Aluminum Capacitor UPW1J101MPD6 Radial
1206
0.047µF 100V Ceramic Capacitor C3216C0G2A473J115AC
C0G
SOT23
Zener Diode 15V 225mW BZX84C15LT1G
LED_0805
Green 569nm LED Indication ‐ LTST‐C171GKT Discrete 2.1V
LED_0805
Red 631nm LED Indication ‐ LTST‐C171KRKT Discrete 2V
SOT23
SOT23
Diode Array 1 Pair Series BAT54SLT1G
Connection Schottky 30V 200mA
SOT23
Diode Array 1 Pair Series MMBD7000LT3G Connection Standard 100V 200mA
SMA
TVS DIODE 18.8VWM 39.3VC SMA SMA6T22AY 1206
CPCYL1/D.325/LS.125/.034 10µF 100V Aluminum Capacitor Radial
CPCYL1/D.400/LS.200/.034 330µF 25V Aluminum Capacitor Radial
805
1206
PCB Footprint
1
1
1
1
4
8
8
2
2
4
4
1
1
6
8
4
14
12
12
4
4
2
2
2
2
2
2
2
1
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
R1,R4,R34,R101,R104,R
134
R2,R3,R24,R40,R102,R1
03,R124,R140
R6,R49,R106,R149
R10,R11,R12,R23,R35,R
36,R37,R110,R111,R11
2,R123,R135,R136,R13
7
R13,R14,R15,R26,R27,R
28,R113,R114,R115,R1
26,R127,R128
R19,R20,R32,R33,R41,R
119,R120,R132,R133,R
141,R151,R154
R21,R39,R121,R139
R22,R122,R150,R155
R25,R125
R44,R144
R45,R145
R63,R163
R156,R161
R157,R162
R158,R160
R159
Q118
MH1,MH2,MH3,MH4
Q2,Q8,Q9,Q10,Q102,Q
108,Q109,Q110
Q3,Q4,Q5,Q12,Q103,Q
104,Q105,Q112
Q6,Q106
Q7,Q107
Q13,Q14,Q113,Q114
Q15,Q16,Q115,Q116
Q117
J4
J3
J2
J1
PJ‐202A
1M
20k
51
2k
200
100k
5.1k
33k
10k
PTD902‐1025K‐A103
100
20
270
10
1k
5.1
IRF9610
FJV1845
FJV992
DNP(LSK170)
DNP(SST74)
IRF710
LSK170C
MH
SST74B
PJRAN1X1U03X (RED)
ACJS‐MHDR
805
805
805
1210
805
805
805
805
805
PTD902
805
805
805
805
805
1210
TO220
SOT23
SOT23
SOT23
SOT89
TO220
SOT23
MTGH125‐PLATED
SOT89
PJRAN1X1U
ACJS‐MHDR
PJRAN1X1U02X (WHITE) PJRAN1X1U
PJ‐202A
ERJ‐14NF2001U
ERJ‐6ENF2000V
ERJ‐6ENF1003V ERJ‐6ENF5101V
ERJ‐6ENF3302V ERJ‐6ENF1002V PTD902‐1025K‐A103
RES SMD 2K OHM 1% 1/2W RES SMD 200 OHM 1% 1/8W
RES SMD 100K OHM 1% 1/8W
RES SMD 5.1K OHM 1% 1/8W
RES SMD 33K OHM 1% 1/8W
RES SMD 10K OHM 1% 1/8W
Potentiometer 10K AUDIO P2.00KAACT‐ND
P200CTR‐ND
P100KCCT‐ND
P5.10KCCT‐ND
P33.0KCDKR‐ND
P10.0KCCT‐ND
652‐PTD902‐1025KA103
P1.00MCCT‐ND
P20.0KCDKR‐ND
P100CCT‐ND
ERJ‐6ENF1000V ERJ‐6ENF1004V
ERJ‐6ENF2002V P20.0CCT‐ND
P270CCT‐ND
P10.0CCT‐ND
P1.00KCCT‐ND P17267CT‐ND
IRF9610PBF‐ND ERJ‐6ENF20R0V
ERJ‐6ENF2700V ERJ‐6ENF10R0V
ERJ‐6ENF1001V ERJ‐14BQF5R1U
RES SMD 1M OHM 1% 1/8W
RES SMD 20K OHM 1% 1/8W
RES SMD 100 OHM 1% 1/8W
RES SMD 20 OHM 1% 1/8W
RES SMD 270 OHM 1% 1/8W
RES SMD 10 OHM 1% 1/8W
RES SMD 1K OHM 1% 1/8W
RES SMD 5.1 OHM 1% 1/2W
MOSFET P‐CH 200V 1.8A TO‐220AB IRF9610PBF IRF710PBF‐ND
FJV1845FMTFCT‐ND
FJV992FMTFCT‐ND
502‐PJRAN1X1U03X
PJRAN1X1U03X
FJV1845FMTF FJV992FMTF 523‐ACJS‐MHDR 502‐PJRAN1X1U02X
CP‐202A‐ND
ACJS‐MHDR
PJRAN1X1U02X
PJ‐202A MOSFET N‐CH 400V 2A TO‐220AB IRF710PBF TRANS NPN 120V 0.05A SOT‐23 TRANS PNP 120V 0.05A SOT‐23
Transistor, N‐Channel, Single, JFET
Transistor, P‐Channel, Single, JFET
Power Barrel Connector Jack 2.00mm ID (0.079"), 5.50mm OD (0.217") Through Hole, Right Angle
RCA Phono Connectors 1 POS RA PH JK WHITE
Phone Connectors 1/4" PHON SKT STEREO
RCA Phono Connectors 1 POS RA PH JK RED
1
2
2
2
1
4
4
4
4
48
49
50
51
52
53
54
55
56
LSJ689
LSK489
SW SLIDE‐DPDT
U3,U103
AD8510
U104
JCE0612D24
standoff
nut
lock waher
socket for U1,U2,U101,U102 TO‐
71
U2,U102
U1,U101
SW1
SOIC‐8
JCE06
SOIC‐8/TO‐71
SOIC‐8/TO‐71
PN22SJNA03QE
Pushbutton Switch DPDT Standard PN22SJNA03QE Through Hole, Right Angle
N‐Channel Transistor, JFET, 6 Leads, Low Noise, Low Capacitance, Monolithic Dual
P‐Channel Transistor, JFET, 6 Leads, Low Noise, Low Capacitance, Monolithic Dual
J‐FET Amplifier 1 Circuit 8‐SOIC AD8510ARZ JCE0612D24
DC/DC CONVERTER +/‐24V 6W
HEX STANDOFF 4‐40 BRASS 1/4"
8713
#4‐40 Hex Nut 0.250"
HNZ 440
WASHER SPLIT LOCK #4
4693
6 Position Socket Connector 0.100" 803‐87‐006‐10‐001101 (2.54mm) Through Hole Gold AD8510ARZ‐ND 1470‐1924‐5‐ND
36‐8713‐ND
H216‐ND
36‐4693‐ND 1212‐1229‐ND
CKN1191‐ND
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