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#861 |
diyAudio Member
Join Date: Oct 2011
Location: Bavaria
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2x30 VAC of course, sorry...
![]() ok, that sounds nice, AudioSan! would 4ohm speakers be a Big Problem? best regards, Matthias |
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#862 |
diyAudio Member
Join Date: Feb 2009
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4ohm will not give you much class A power. then you are down to 20W class A. and about 170W class A/B. i would use a little bigger transformer for that. but it all depends on your volume
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#863 |
Official Court Jester
diyAudio Member
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agree with Trondheim Boy
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my Papa is smarter than your Nelson ! clean ![]() ![]() ![]() |
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#864 |
diyAudio Member
Join Date: Feb 2009
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we agree on alot this days
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#865 |
diyAudio Member
Join Date: Apr 2009
Location: Detroit, born and raised in the netherlands.
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Wow!! AudioSan brings in the heavy metal!! Wow, that's a lot of heatsinks.. You better upgrade your electrical connections to your house!
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#866 |
diyAudio Member
Join Date: Feb 2009
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#867 |
diyAudio Member
Join Date: Feb 2009
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ZM. a question. i have pr now R5/6 at 1Kohm, and 7.1mA J-fets(i forgot to calculate a reise of the resistance)
i can solder in some 2.2Kohm resistors. or i have another set of 7.1mA J-fets i can solder in, to dobble up the J-fets. what would you do? i don't know if 2.2K will be enough for 7.1mA fets. but with dual 7.1mA fets, 1Kohm chould be enough? right? |
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#868 |
Official Court Jester
diyAudio Member
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considering that you're going to Turbo (driving 3 pairs ? yes ?) , I would toss another pair of small Toshiba critters in
in any case - metal film resistors are pennies each , so every time when you buy them , buy triple your needs ....... and not just values you need in a moment - then you'll have them when you need them I'm hearing differences between resistors only in really low level circuits - for power stages you're always more than good with cheapest MF resistors those already are of decent industrial quality , and that's serious thing
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my Papa is smarter than your Nelson ! clean ![]() ![]() ![]() |
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#869 |
diyAudio Member
Join Date: Feb 2009
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acctualy 4 pairs
![]() ![]() ![]() but for this case, i think i go with dual J-fets. that was my plan from the beginning becouse of the 4 pairs outputs. it can be a little on the limit for 1 pair of J-fets. i use Dale CMF60 all the way on this ones. exept the 3W's ofcourse. and R2 (forgot to order 47.5Kohm resistors) ![]() Last edited by AudioSan; 7th January 2013 at 10:10 PM. |
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#870 |
diyAudio Member
Join Date: Feb 2009
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amp layout. and diodes soldered in. only outputs and some wireing left until first start up. also soldered in another pair of J-fets.
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