Has anyone tried this "350 watt" amp

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#22
Hi gents,
I am looking for the L20 V9.2 detailled schematic . Where is it possible to find it ?????
I have found the V9 version but impossible to find the V9.2 using BTL complementary transistors drivers instead mosfet transistors drivers.
Thanks a lot for your reply
Best regards
 
#24
I try it already,and i have nice smoke out of it,i found the two diode next to the caps 1n4007 in short circuit,i toke them out and i was surprise to see that is not 1n4007 is the 1n4001 So this really pis me off,i change on both kits this rubbish diode with proper 1n5391 diodes,an after i plug them again...and surprize,both kits workin proper..and powerfull sound i measure power via ground and i have ground and plus +47vcc and graund minus -47 and betwin + and - i have constant 94vcc,i have a nice extra large power capacitors Elna 10.000uf/80v per piece from an old pioneer sa v210. So now i see it works proper with deep bass and no sign of troubles.
 
#25
I see in all the specification that the maximum power is 70vcc but,is +70vcc and -70vcc from the ground??
This is mean 140vcc betwin + and - and a 58-0-58vac input.
And most of transformers have 60-0-60vac so it will be 144,6vcc betwin + and minus,and a +72,3vcc -72,3vcc
Well i guess is far too much this...

So how they calculate the input?? 70vcc betwin + and - ? or +70 -70 from the ground? Cheers.

And another question,this transformer 525watts with 10A and 40-0-40vac is enaugh for this kits? Before i use it with Some EBB250watts audio kits,and it really sound good,but this one's are better.
Thank you,and sorry for my bad english 😀
 
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