The circuit has a rectifier circuit, so you only need to connect the transformer, no need to plug the rectifier board. Wiring installation is very convenient. The fully symmetrical architecture plus sophisticated transistor pairing makes the midpoint very stable from debugging.
Adjust the static current of the large pipe to 100-300mA per tube, the board has 1 TEST point, and the pressure drop of the test 2 end is 20-60MV.
Note: Remember to add mica film when installing large tubes. Mica film must be coated with thermal silica gel.
Operating voltage: AC24VX2 ~ AC42VX2 plus AC12V Remarks: AC12V is used to protect the circuit
Output power: 200W 8 ohms 300W 4 ohms
Distortion: 0.002% Signal to Noise Ratio: >100dB
PCB size: 195*80 mm
The circuit resistance is standard with 718 resistors, and the protection circuit is Japan Omron. The input tube is Japan Toshiba HIFI quality tube 2SC2240 2SA970 precision pairing. Pushed to be the king of NJE15034/35. The high-power tube can be paired with 6 pairs of Dongzi 2SC5200.1943 or 4 pairs of three-inch tubes. Of course, it can also be equipped with ON tubes.