• 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.

converting a dynaco mark IV driver board for headphone amp use

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Ok, heres my second attempt to get some ideas for a PCB to make a few tube headphone amps as xmas give aways. So far, I'm not able to find a PCB for a pentode based headphone amp using 6au6's thru el84's. So my next best thought is to convert a readily available board. So I'm looking at the Mark IV board. I think the basic board has a enough drive to power a small transformer to power some headphones. The mark iv board is dirt cheap. Something like 18 buck bare bone, and 30 fully populated. Ideas?
 

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