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DIY Kits HIFI 6J1 Electronic Tube Hybrid Power Amplifier Board Headphones Power Amplifiers LM1875T DIY Amplifier Module 20W
| Quantity | 5+ | 10+ | 30+ |
| Price | $13.20 | $12.90 | $12.50 |
Product Details
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
Im1875t amplifier output power: typical 20W (max 30W)
3.Loudspeaker impedance: 4-8 ohm
4.Total harmonic distortion: <0.04%
5.Signal noise ratio: 105dB
6.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:
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I. Tested by ICStation's Outstanding Partner arduinoLab:
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Learn More Details in Below Video:
(The language in the video is Russian)
II. Tested by ICStation's Outstanding Partner 12voltvids:
Learn More Details in the Video:
(The language in the video is English)
III. Tested by ICStation's Outstanding Partner Mundo Electrónica:
.jpg)
Learn More Details in the Video:
(The language in the video is Spanish)
Customer Reviews (5)
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By Lindsey Lewis2022-04-26 09:36:04
Amp works well, but has narrow mains band. I am in USA and mains where I live are 122 VAC. Toroid expects 110 vac but gets 122 and outputs 22 vac. So rectifier then puts out 27 VDC. Blew 2200 uF 25VDC caps right off. Then I installed 4x 2200uF 50 VDC rated Low ESR caps instead. Put on underneath side of circuit board to make them fit. Then I installed a 62 ohm 5 watt resistor. Heat sink then runs pretty consistent at 69 or 70 degrees C. Probably needs slow fan or bigger heat sink. -
By Henny Beekman2022-03-27 23:23:47
Nice amplifier for my STAX Electrostatic headphone SX34. Amplifier has enough power to drive the transformator for de elctrotatic Headphone. Sounds super.
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By Tyler Mitchell2020-03-15 13:18:20
Great project! Could use a little more protective packaging and the heat sink tears the bag, but package arrived in good writing order. Please advise if this input power transformer is suitable - it's hard to find and we need English instructions, though board is very clearly labeled good job :) https://www.newark.com/triad-magnetics/vpp36-1560/power-transformer/dp/37B9213 -
By Charles Tyler2018-07-21 04:41:02
I bought this kit months ago and I am having trouble finding a transformer for it, so you guys sell one? or can you put a link to one that will work? Thanks -
By Larry Zwierski2017-08-23 20:41:49
Very nice kits, all complete. The Chinese manual is very good to understand. Anyway it's easy.
