DISCLAIMER: THIS MIGHT NOT WORK I AM NOT AN EXPERT
ANYONE READING THIS DO NOT BUILD THIS UNLESS YOU CAN INFER THE FINER DETAILS OF THIS CIRCUIT AND PRECAUTIONS
Make a nicely smoothed HT supply of around 300v, put a decent CCS set to around 6-8ma of your choice in a 6SN7 anode for each channel with the appropriate cathode resistor to get the quiescent voltage at around half of HT. You now have a voltage gain block with a gain of around 12.
For the output stage, make a CCS set to around an amp and use this as a load for an emitter follower. RC couple the voltage gain stage to the emitter follower and put a big cap on the output stage to null any DC offset to the speaker, bypassed with a smaller film cap of your choice
ANYONE READING THIS DO NOT BUILD THIS UNLESS YOU CAN INFER THE FINER DETAILS OF THIS CIRCUIT AND PRECAUTIONS
Make a nicely smoothed HT supply of around 300v, put a decent CCS set to around 6-8ma of your choice in a 6SN7 anode for each channel with the appropriate cathode resistor to get the quiescent voltage at around half of HT. You now have a voltage gain block with a gain of around 12.
For the output stage, make a CCS set to around an amp and use this as a load for an emitter follower. RC couple the voltage gain stage to the emitter follower and put a big cap on the output stage to null any DC offset to the speaker, bypassed with a smaller film cap of your choice
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