102 In stock
Finished PCBA Amplifier Board
IWISTAO PCBA Tube Headphone Amplifier Kits HIFI WCF Solution 32~1200 Ohms Stereo Audio DIY
Model No: WHFTA-HA009
The solution of this tube headphone amplifier adopted WCF; its work status is class A. It has a relatively low output resistance, and it can drive 32-1200 ohms headphones (recommended 50-600 ohm). There is not a big loop feedback circuit, and no need compensation capacitors.
Its sound is three-band EQ tone, timbre and sweet, smooth and natural. If you think the tube headphone is just warm and not enough detail, maybe you are wrong, it's sound details is stronger than those headphone amplifier with the most majority op amp IC.
6N6 plus 6N11
6N6 plus ECC88
The photos below are the last version, just for you information.
( Tubes of the picture above are used 6N11 X1 and 6N6 X 2 for this standard version)
Better electronic circuits and better tubes, they will lead to natural better tone. Circuit debugging is free, making it as super-simple; because the design is reasonable, there is very low noise, when switch the unit without any direct impact.
Due to vacuum tube’s high input impedance, packing and grounding shall be required, so you can block out unwanted interference noises, the easiest way is that use a small tin can as its casing.
1. DALE resistance throughout the United States;
2. RIFA coupling capacitor (not figure Suren capacitance, pictures are for reference);
3. The filter used in all parts of Japan black gold steel brown 100U-400V high-voltage capacitors (BC capacitance 100U discontinued, pictures are for reference);
4. The gold-plated tube base holders.
1. PCB Dimensions: 131mm X 98mm
2. The distance between the potentiometer and the headphone jack: 45mm
3. Voltage: filament AC6.3V (1A-2A) * 1 group, AC 180V - 230V * 1 group
4. Output Impedance: 32-1200 ohm (recommended 50-600 ohm)
5. Standard version for voltage amplification level is 6N11X1, output stage is 6N6X2.
6. Packing list
1). Without tubes version:
WHFTA-HA009 PCBA x 1
2) .6N6 plus 6N11 Version:
WHFTA-HA009 PCBA x 1
6N11 x 1
3). 6N6 plus ECC88:
WHFTA-HA009 PCBA x 1
ECC88 x 1
7. Circuit Diagram
Matched Headphone Amplifier Toroidal Transformer and Casing
Toroidal Transformer 40W HIFI AudioTube Pre-amplifier Dedicated 9 V /2A AC 30V-0-30V / 0.2A Pure Copper Amp DIY
Tube Amplifier Casing W168 H100 D229 for WHFT-5670 Whole Aluminum Matisse Circuit Silver Chasis Audio HIFI DIY
Effect picture after assembled with the casing
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