I haven't built up my boards into a chassis yet, but I just want to post that @schultzsch is a reputable diyer that anyone interested in well built boards can rely on.
Thank you Lucian for the wonderful kits!
Thank you Lucian for the wonderful kits!
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Hello Dan!
Thanks for the nice words and as the others already know you are a gentleman!
Thanks for the nice words and as the others already know you are a gentleman!
..asking also precious Lucian support to improve the psu in my preamp.. and hoping to fire up these amp boards asap too.. it will be soon, won't it be?
well like you said, you got to a turning point with the power supply for you Blowtorch preamp because of not having enough voltage to drop across the ccs of the shunt regs that you want.
With the actual trafo a good but expensive solution is a lt3081 ccs and ZM’s gg error amp probably followed by some bjt cap multipliers if you want 2 stage regulation.
Some voltage can be gained also with active rectifiers.
Best would be another trafo with higher rails. The money you spend on the active bridges and the lt3081 brings you close to the price of a new trafo with the needed rail voltages.
Beside this with a trafo that has bigger rail voltages you can account for 10% mains variations.
Going with the higher rail trafo enables you to use the floating ccs in the gg but with some tweaking for a bit more psrr.
If you have some time one day we can speak on whatsapp and decide exactly what to do. It doesn’t take long to draw those aluminum pcbs and to populate them.
With the actual trafo a good but expensive solution is a lt3081 ccs and ZM’s gg error amp probably followed by some bjt cap multipliers if you want 2 stage regulation.
Some voltage can be gained also with active rectifiers.
Best would be another trafo with higher rails. The money you spend on the active bridges and the lt3081 brings you close to the price of a new trafo with the needed rail voltages.
Beside this with a trafo that has bigger rail voltages you can account for 10% mains variations.
Going with the higher rail trafo enables you to use the floating ccs in the gg but with some tweaking for a bit more psrr.
If you have some time one day we can speak on whatsapp and decide exactly what to do. It doesn’t take long to draw those aluminum pcbs and to populate them.
Thanks a lot, I do not mean to clutter your thread, but your BT clone is a real marvel. Keep up the good work!