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Old 18th December 2010, 05:13 PM   #1
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Join Date: May 2010
Location: Where the world's best tea come from:Kericho Kenya
Default Transistor power dissipation

Hi guys,
I tried reading about this but i got myself mixed up.
Am rebuilding an old amp too far into the project i cant back down.
The transformer is a 200va 35Vac,that comes to +/-50dc.Two pairs of A1943&C5200 output devices.I intend to use it on 4ohm load.What would be the power dissipation per device?
Just for more information,i'll need about 100W off the amp.Any changes i should make in this project?Any suggestion will be most welcomed.
if there are no sparks,it probably doesn't work!
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Old 18th December 2010, 05:16 PM   #2
AndrewT is offline AndrewT  Scotland
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Join Date: Jul 2004
Location: Scottish Borders
2pair of 1943/5200 from a +-50Vdc supply is certainly OK for 8ohm use.
Probably OK for 6ohm as well.
Severe reactance 4ohm speaker played loud (party levels) could make the output stage so hot that the transistors are overstressed.
I don't know how long they would last.
Have you read ESP and Janneman yet?
regards Andrew T.
Sent from my desktop computer using a keyboard
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