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DIY Kits HIFI 6J1 Electronic Tube Hybrid Power Amplifier Board Headphones Power Amplifiers LM1875T DIY Amplifier Module 20W

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Product Introduction:
1>. Power Supply Voltage: defaults double AC 18V/3A, power more than 60W (the maximum voltage should be no more than double AC 19V, and it should be no less than 18V; or the digital tube will be off, and the voice will get distorted; if you want to use AC 12V, you need to modify lamp filament buck resistance 2.2 ohm; then the amplifier output power will be relatively low).
2>. Headphone amplifier/pre-output: amplification times is 0.8
3>. Im1875t amplifier output power: typical 20W (max 30W)
4>. Loudspeaker impedance: 4-8 ohm
5>. Total harmonic distortion: <0.04%
6>. Signal noise ratio: 105dB
7>. Frequency response: 14Hz-100KHz

Component List:

NO. Components Silk Screen Parameter QTY
1 Metal Film Resistor R1,R3,R10,R13,R17,R18,R20,R21 4.7K 8
2 Metal Film Resistor R2,R4,R30,R31 1K 4
3 Metal Film Resistor R5-R8 47ohm 4
4 Metal Film Resistor R22,R23 56K 2
5 Metal Film Resistor R11,R14 470K 2
6 Metal Film Resistor R12,R15 200ohm 2
7 Metal Film Resistor R9 3W 47ohm 1
8 Metal Film Resistor R16,R19 100K 2
9 Metal Film Resistor R24,R26,R27,R32 22K 4
10 Metal Film Resistor R25,R28 10ohm 2
11 Electrolytic Capacitor C13,C14 47uf 10V 2
12 Electrolytic Capacitor C1-C4 2200uf 25V 4
13 Electrolytic Capacitor C5-C8 470uf 35V 4
14 Film Capacitor C15,C16 0.1uf 50V 2
15 Film Capacitor C9-C12 1uf 50V 4
16 LM1875T U1,U2 TO-220-5 2
17 D667 Transistor Q1,Q4 TO-92 2
18 D647 Transistor Q2,Q3 TO-92 2
19 Audio Socket J3,J4 3.5mm 2
20 Terminal J1,J2 KF301-2P 2
21 Terminal J5 KF301-3P 1
22 LED D1,D2 3mm 2
23 Rectifier Bridge P1 KBJ608 1
24 Potentiometer RP 50K 1
25 Screw   M3*5mm 2
26 Screw   M3*6mm 2
27 Isolation sheet   M3 2
28 Heat Sink     1
29 Thermal Grease     1
30 Nut     1
31 6J1 Electronic Tube     2
32 6J1 Socket     2
33 T0-220 Insulation film     2
34 PCB     1

Finished Product Picture:

Please Download the Diagram here:

Tested by ICStation's Outstanding Partner arduinoLab:

Learn More Details in Below Video:

Tested by ICStation's Outstanding Partner 12voltvids:

Learn More Details in the Video:


Rating: [5] 5 of 5 Stars! Date Added: 2017-08-23 20:41:49
Very nice kits, all complete. The Chinese manual is very good to understand. Anyway it's easy.

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DIY Kits HIFI 6J1 Electronic Tube Hybrid Power Amplifier Board Headphones Power Amplifiers LM1875T DIY Amplifier Module 20W