Maybe this pair of fully built Sony PP boards is interesting for you guys:
https://www.diyaudio.com/community/...-boards-curve-matched-vfets-available.407200/
https://www.diyaudio.com/community/...-boards-curve-matched-vfets-available.407200/
It's good to be cautious and test them before use. Heck, recently a member bought fake ZTX450/ZTX550 and they're in production and easily available...the weirdest things are being faked these days
only because of the thread and "someone's" got to say it: real or not, they are not vfetsAny views on whether these are genuine parts?
Thanks
Sven
Thanks, I know that. Still needed for the amplifier discussed in this thread though.
It's perfectly fine to use the TO-247 versions (IRFP240/IRFP9240) though some might prefer the look of the TO-3 parts.Thanks, I know that. Still needed for the amplifier discussed in this thread though.
Hi All.
Just another build of Rev-2 with Teabag boards. However, now used 3 pairs of k82/j28 per channel and the Front End is powered by separate regulated PSU +/-33V from separate trafo. Also adjusted rails from +/-19 to +/-24, to be a bit closer to 40-th anniversary commemorative thing. The amp is giving 15.2V RMS before clipping at 4ohms dummy load, so it is about 58 WPC. Bandwith is narrow than original, going to moderate decline from 40kHz. Biased at 1 amp per channel.
Just another build of Rev-2 with Teabag boards. However, now used 3 pairs of k82/j28 per channel and the Front End is powered by separate regulated PSU +/-33V from separate trafo. Also adjusted rails from +/-19 to +/-24, to be a bit closer to 40-th anniversary commemorative thing. The amp is giving 15.2V RMS before clipping at 4ohms dummy load, so it is about 58 WPC. Bandwith is narrow than original, going to moderate decline from 40kHz. Biased at 1 amp per channel.
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