it is a question did seller knew for what mosfets are going to be used 
anyway , just to chime in - I'm using 0R27 in my Babelfish ........ so no biggie changing few things here and there , under condition that you at least partially know what you're doing
Papa is certainly more content with someone making more of his own amp , vs. making Papa's knock-out ; though , his happiness is even greater , less we bother him ..... more time for Papafun ........ (new Papamps, movies , books )
anyway , just to chime in - I'm using 0R27 in my Babelfish ........ so no biggie changing few things here and there , under condition that you at least partially know what you're doing
Papa is certainly more content with someone making more of his own amp , vs. making Papa's knock-out ; though , his happiness is even greater , less we bother him ..... more time for Papafun ........ (new Papamps, movies , books )
it is a question did seller knew for what mosfets are going to be used
He did know it was for an Aleph build.
"Nelson recommends matching то 100mV. Your mosfets are matched to few milivolts"
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Very Nice! Looks great! I love my Aleph J, I’m glad I took 6L6’s suggestion to build it.
+ Papa edition of " Essential Dictionary for DiyAudio Greedy Boyz Vol.1 "
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I have a question about mounting the mofsets. Is there a best way?
1. Mount them to the board and then make the bends and if so how far do you insert them
2. Mount them to the heatsinks, make the bends and then solder
3.Mount the boards to the heatsink first then make the mofsets fit
thanks
1. Mount them to the board and then make the bends and if so how far do you insert them
2. Mount them to the heatsinks, make the bends and then solder
3.Mount the boards to the heatsink first then make the mofsets fit
thanks
Attachments
You can't just mount them on the heatsink There must be an electrical insulator between MOSFET's and heatsink
So use mica and thermal paste or Keratherm pads:
Keratherm Transistor Insulators – diyAudio Store
Well I’ve powered up my first Aleph J build. I’m am a bit nervous about the final setup as it’s new territory for me so please excuse my obvious insecurity with these questions.
I’m assuming DC offset is done with the power off, am I correct?
I am getting .1 volt measurement at the output terminals and cannot seem to go lower when adjusting R7 for offset. Does this indicate a problem?
From reading here it seems the lower the bias set the lower wattage the amp puts out and the cooler it runs, would it ok to bias to .30V (or some voltage less than the target .40V) and still have a great sounding Aleph J ?
While powered up I get a reading of 17.44V at the speaker terminals is this in line with expectations?
Thermistors are hot to the touch, is this normal?
Why is R8 a variable resistor and what does it adjust?
Thank you in advance for the help! You guys are the greatest!
I’m assuming DC offset is done with the power off, am I correct?
I am getting .1 volt measurement at the output terminals and cannot seem to go lower when adjusting R7 for offset. Does this indicate a problem?
From reading here it seems the lower the bias set the lower wattage the amp puts out and the cooler it runs, would it ok to bias to .30V (or some voltage less than the target .40V) and still have a great sounding Aleph J ?
While powered up I get a reading of 17.44V at the speaker terminals is this in line with expectations?
Thermistors are hot to the touch, is this normal?
Why is R8 a variable resistor and what does it adjust?
Thank you in advance for the help! You guys are the greatest!
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