DIY Sony VFET Builders thread

Number 77 up and running...

Straightforward build, no major issues and right away measured 20.2 volts at both channels! At first try left channel input lead had broken off at the board connection. Fixed that and sounding beautifully. Will give another testimony when broken in. Has a lot of worthwhile competition .... FW F4 and Pass XA-25....
 

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Seems my amp is up and running. At least it can output a 1kHz sinus in 8 ohm dummy loads. The DC-voltage at the test point needs a fine tuning. It stays about 18.8 - 18.9 VDC. Not much change from cold to warm.

Good it works as it would be a bit time consuming to debug it for errors.....unsolder wires etc.....

Next step after adjustment would be to listen to the amp. I am using my M2X mono blocks in the moment and have just put in the Cedarburg input boards. The M2X amps are quite heavy to move.....but I will test the VFET amp in the near future with real music instead of a 1kHz test tone.
 

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I didn't have any question about how to connect it. I asked MEPER about his. You can of course connect however you want, and you could even the speakers red to black and black to red outside of the amp too. But you are bound to forget to do so and anyone else wouldn't know.
My intention was to make him sure that was what he wanted.