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Tube Amplifier Kit E305 FET Diamond Audio Amplifier Differential Amplifier Pure Rear Power Amplifier Professional DIY Kit
Product details:
- notice: The prices for the mono board, stereo need to buy two pieces!!!
- The PCB size is: 42 x236mm, very small, suitable for connecting
- Power supply voltage: DC double 30-50 v (higher voltage need to change the filter capacitance pressure value),Recommend + - 45 or so namely variable pressure AC32 * 2 after the rectifier filter voltage DC + / - 45 v (golden voice E305 level after the power supply voltage DC + / - 45 v).
- OutPower: 250 watt (total harmonic distortion THD + N < 0.2%), the DC + - 50 v, 4 o loads measured;
- Note that this amplifier power supply is after rectifying filtering double dc power supply, not directly connnect the transformer.
Debugging steps:
- After completion of welding with good heat sink (note that the pipe and the heat sink should be insulated handle), adjusting VR1 (1 k precision is adjustable Resistance) makes the static current 100 ma,I.e., the output point on both ends of the voltage V1 and V2 about 22 mv (R30 output resistance In addition to this resistance value is 0.22 euro ends voltage static current), both located in the output (OUT).VR1 reverse time Needle static current is larger, clockwise is reduced. Suggestions on electricity clockwise twist laps before! Safety! Don't put wrong adjustable!
- Neutral zero, regulate the VR2 (500 r close adjustable resistance), make the output (OUT) of (i.e. amplifier output terminals At both ends) close to zero millivolt; Resistance without a fault can be adjust to 0 mv, worst can also adjust to a few millivolts.
