no one's pointing this out: you got fake output transistors!More Pictures. this one is a closeup view of the build.
hi macd, have you finished this amp i'm also SA where did u get toroidal tx my email is ejhgbb@gmail.com im busy locating parts to do this amp and wondering maybe u can help txs john
hi sixtek,
cannot download file as it is damaged can u repair please. need new pcb pdf (file).
http://sixtek.uw.hu/st151_nyak.pdf
txs john
cannot download file as it is damaged can u repair please. need new pcb pdf (file).
http://sixtek.uw.hu/st151_nyak.pdf
txs john
Ok so i've built this amp. It works for about 30min at loud volume then outputs blow I'm using a 4ohm speaker. My supply is -/+ 48V.
I've used tip35/36, 2sc5200/2sa1943 and also mjl21194/95.
Is my heatsink too small?? Will a larger heatsink change SOA of devices for the better?
I've used tip35/36, 2sc5200/2sa1943 and also mjl21194/95.
Is my heatsink too small?? Will a larger heatsink change SOA of devices for the better?
+-48Vdc should get you close to 200W into 4r0.
For BJTs I suggest you use ~5 to 6times that target power for the total device power, i.e ~1100W of device power. For 1943/5200 @ 150W each, that comes to either 3pairs or 4pairs.
I suspect it's not just a heatsink inadequacy problem!
For BJTs I suggest you use ~5 to 6times that target power for the total device power, i.e ~1100W of device power. For 1943/5200 @ 150W each, that comes to either 3pairs or 4pairs.
I suspect it's not just a heatsink inadequacy problem!
Nice sound amplifier design you have here. It is a classic topology (called LIN)that has many flavors.
I'm sorry
helllo i'm here please help me stk4141
i don't know how make vloume bass treble sound control
please give me volume line out
thank u
i don't know how make vloume bass treble sound control
please give me volume line out
thank u
An externally hosted image should be here but it was not working when we last tested it.
John G! Nice box!!
Where did you get it?
In the olden days I used to buy enclosures from Apon electronics, they werent too expensive. Give them a call, very friendly japanese staff. Special of the Week - Toptronic (PTY) Ltd T/A AP ELECTRONICS
Vpk = sqrt(P*Rload*2) = sqrt(100*2*2) = 20Vpk.
PSU ~+-25Vdc for 100W into 2ohms speaker. Expect peak transient current to approach ~30A.
Thank you dear friend
+-32vdc=???w 2ohm
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