regarding 2SC5200/2SA1943 (driver?)
would you suggest Fairchild or Toshiba ?
I have 8pair of MJL21193/94
Maybe I could use one pair in place of the 2SC5200/2SA1943 ?
and 'just' have 7 output pairs
I will probably use slightly lower voltage
for home use, bass guitar
Use Toshiba 2SC5200/2SA1943 as driver and 8pair of MJL21193/94 as outputs.
The use of this scheme for the power supply is not very good idea. If any of the capacitors have problems, the fault could be massive and could be extended to the other capacitors, being able to destroy much of the capacitor bank.
Even the capacitors would have to be fairly well matched to ensure a proper distribution of voltages and prevent perforation of dielectrics.
regards
😉. Even if one wants to achieve the same ripple source but at half voltage, may reinforce the capacitors close to GND
regards
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A 1Kw amp. using bipolar output transistors should be bridged to maximise transistor SOA.
Your SOA protection is poor. Moreover, you should not use base-collector capcitors on your protection transistors. Download SOA protection paper here:
http://www.diyaudio.com/forums/solid-state/235841-michael-kiwanukas-soa-paper.html
This solution has potential problems: If the diode bridge on the right of the schematic is opened for any failure, we return to have any chance of massive failure. Even if a capacitor is shorted, it can cause damage in another capacitor placed in the higher voltage rail or vice versa.
Here is a version even more reliable. If a diode bridge opens for failures, no problems. It is even far more silent.
regards
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think I will use 'standard' 50-55Vac trafo
(also considered a switchmode supply, but no)
lets just call it 1000watt into 4ohm 😀
if you really want it that loud, you will need more speakers anyway
that said, I have never experienced a cap that failed
but I suppose anything is possible
(also considered a switchmode supply, but no)
lets just call it 1000watt into 4ohm 😀
if you really want it that loud, you will need more speakers anyway
that said, I have never experienced a cap that failed
but I suppose anything is possible
OMG!! i like going back back to old school amp...
Fun starts here...... Building a hand made customize trafo for this amp is a real fun..
Fun starts here...... Building a hand made customize trafo for this amp is a real fun..
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why does it always end getting stuck on money issue 😱
need to put some sense into it...for my own sake
I already have most parts for two mono amps running on +/-55Vdc (2KVA)
(and I even have small trafos for input/VAS running on +/-60Vdc)
need to put some sense into it...for my own sake
I already have most parts for two mono amps running on +/-55Vdc (2KVA)
(and I even have small trafos for input/VAS running on +/-60Vdc)
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