• 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.

Prototype preamp example

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Here is my prototype preamp. It is an SRPP design using 2, 6SN7 tubes. The power supply (the large box) uses 1 regulated HT at 315V and 2, regulated LT, one with an elevated reference.
The case was built using salvaged stuff that I bought at various electronic flea markets. Most of the components where purchased from Newark or parts Connexion. The design and construction is based on the Morgan Jones books
I have seen it work on the scope. I think I am a few weeks away from hearing music though it.
Cross you fingers!
 

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