• 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.

Van der Veen 70W tube Amp DIY

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#41
I recently built that amp, new version, using the pc board supply by Meno, and using KT77, Ecc88 in place of the first suggested tubes.
The result is very good and the sound is very good too. But it also suffers from a bit of hum in only one channel. I tried many modifications but there is still some residual noise. But once can only hear it with a headset so it's very low. I would like to discuss those issues with you and other UL40S builders so we can help each others.
Thanks
Serge
 
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