• 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.

AliExpress DIY AUDIO NOTE MEI SHU <= Is it worth?

@tomchr which schematic would you suggest for a good 300B SET?
If you don't mind a little sand in your glass then this one: https://neurochrome.com/pages/dg300b

An alternative could be the Tubelab SE or SSE. Get the boards while you can: https://www.diyaudio.com/community/...sing-operations-as-of-the-end-of-2023.400691/

The OPT makes a big difference. I've tried Edcor CXSE and Electra-Print with good results. I would trust Monolith too. I hear Toroidy in Poland delivers good toroidal OPTs too.

Tom
 
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I still don't understand the use of sand with tubes in the active parts of circuit.
It is my limit but when it is involved the 300B a simply but efficent driver makes a great help.
And the dg300B is one of the worst I even seen until today.
4,4 mA for the 6N6 for driver stage!! I have some doubt with the right bias point

Walter