that cap is slightly relaxing danger of pumping DC offset from source
if you're sure that preceding stage is having none of it , you can short the cap , with amp output offset re-check
if you're sure that preceding stage is having none of it , you can short the cap , with amp output offset re-check
have made the "aleph 3 J" feedbach change 10K /1K 220uf to 220K / 22K direct to ground .
it sound louder as this so i presume the feedbach have changed a bit 😉
have made the "aleph 3 J" feedbach change 10K /1K 220uf to 220K / 22K direct to ground .
it sound louder as this so i presume the feedbach have changed a bit 😉
You are probably getting a slightly higher input voltage with the higher input impedance...
at last ordered ZTX550 and ZTX450 and some new Res to end up with a full aleph J .... Zen contagious? 😀
something scratching my head , with the aleph 3 the AC gain and bias resistor was 1K /47K for IRF244 and with aleph J it is 1K2 68K for IRF240
so my question is what setting to keep with my aleph J with IRF244 ?
so my question is what setting to keep with my aleph J with IRF244 ?
ok i will , so to resume increasing 47K to 68K i will get higher bias and increasing the AC gain resistor the AC will reduce the % of the CCS gain ?
i prefer 68K but more heat on the heatsink: i'v got 0,56V on the 0.47source resistor !
for the AC gain i put the trimmer to 50% of the ouptut but cant honestly tell the difference between 40 /50 or 60 %
sissy amp yess but with hair on the balls 😀
50% result in 650R for the AC resistor , PAPA 1K is a better match with tube amp
50% result in 650R for the AC resistor , PAPA 1K is a better match with tube amp
Sissy amp
you want a real sissy, ALEPH JM !
yesterday i was so afraid with the heatsink temp ( can fry an egg) that i remove one stage of CCS and Power transistor.
and also the current and AC gain resistors and running it as pure CCS
and the sound is a fantasticmellowbuttered ..
the only problem with this PaPa amp is to choose one variant as all sounds marvellous in their ways. 😉
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that's a sissy advice 😀
on the Mini J i'v got 23V X 1.25amp 29W on each Mosfet and the Alpeh 3 heatsink is a little colder than the full aleph with 0.8amp
is there a gain to change the source resistor from 0.47 to 0.33 on the Mini ?
danger robinson ? 🙂
on the Mini J i'v got 23V X 1.25amp 29W on each Mosfet and the Alpeh 3 heatsink is a little colder than the full aleph with 0.8amp
is there a gain to change the source resistor from 0.47 to 0.33 on the Mini ?
danger robinson ? 🙂
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