It seems that I am about to build my liquid cooled Sony Vfet , finally
I need from you guys some info to do so , do the 2SJ313/2SK2013 need to be matched ?
are the TO3 IRF 240/ 9240 "better" in a way than the TO247 , fact is I would like to have them all TO3
well , I thing I will stick around for awhile , it's an serious build
.
I need from you guys some info to do so , do the 2SJ313/2SK2013 need to be matched ?
are the TO3 IRF 240/ 9240 "better" in a way than the TO247 , fact is I would like to have them all TO3
well , I thing I will stick around for awhile , it's an serious build
.
No, matching is not required. I used the TO-3 's also in my VFET-X amplifier. It sure looks much better:
VFET-X (or my 1/3 40th Anniversary Sony VFET Clone)
But they measure the same as TO247, so no difference. They are a bit hard to find nowadays in TO-3.
VFET-X (or my 1/3 40th Anniversary Sony VFET Clone)
But they measure the same as TO247, so no difference. They are a bit hard to find nowadays in TO-3.
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if these numbers (10 and 25mV) are in temp equilibrium, then you're done
chill, enjoy, go to surf
yes, more than done!
btw, i have approx. 20mv an 100mv on the outputs and the amp sounds still excellent
It seems that the trimpots are a real "thing" in this build , is the lower the ppm /° the better , like this : Y0056500R000K0L Vishay Precision Group Foil Resistors | Mouser France
price is not a concern for me , i want my amp to be stable
.
price is not a concern for me , i want my amp to be stable
.
It seems that the trimpots are a real "thing" in this build , is the lower the ppm /° the better , like this : Y0056500R000K0L Vishay Precision Group Foil Resistors | Mouser France
price is not a concern for me , i want my amp to be stable
.
If price is not a concern, those could be one of the best:
j. 1240W (5K ohm @ 5%) (5K ohm)
g. 1240W (500 ohm @ 5%) (500 Ohm)
P.S.: Although I'm not sure if trimpots affect the sound in DIY Sony VFet build..
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I would think that using a multi-turn pot will pay the largest dividends in terms of setting the adjustments properly. I used single-turn pots that came with the kit and it took a bit of effort tweaking back and forth. Once it was set, I checked it a few times and not I just don't think about it anymore.
I've done exactly that. It's possible, but all the pots interact with each other, especially since the feedback loop is closed. Go slowly with tiny changes to the potentiometer settings, let the temperature equalize after each setting. You'll get a feeling for the direction the circuit is going in.
I described my setup in post #88 https://www.diyaudio.com/forums/pas...et-illustrated-build-guide-9.html#post5009054
I described my setup in post #88 https://www.diyaudio.com/forums/pas...et-illustrated-build-guide-9.html#post5009054
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