• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

6sn7 pre

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hello,

I look for a link to this schematic. Can anybody help me?

drobert
 

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What is unclear?

you have a power supply which will deliver ~240V. The 6SN7 runs its heaters on AC. It has ~6kOhm output Z( excepting where the coupling cap takes over and dominates at lower frequency ).

You should be able to get it working almost anything which is even close to what is described on that schematic.

I'd suggest a higher B+, and double the plate load resistor. 32-34kOhm is a nice load line when B+ is ~440VDC. Drop 250 of those volts across the plate load, for about 6-8 mA.
cheers,
Douglas
 
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