Audio amplifier with 6SN7 tube, #2
|This is a 6SN7 tube
The output stage is mosfet. All voltage gain is in the tubes.
Finally amplifier finished. Having planned it for a long time.
I forgot to draw in that there are four mosfet on each channel.
There are also four 3K3 and R47 resistors.
Power supply. +/- 55 Volt DC, + 280 Volt DC
Heater power supply.
|Here is Power to the heater
Uses an LM2576 switching regulator that delivers out 12.6 volts DC.
This withstands max 40 Volt input, so I have a linear regulator which sets down the voltage from 55 volts to 40 volts.
Hum suppressing circuit.
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