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Re: Schematic [message #27223 is a reply to message #27214] Thu, 21 March 2019 07:55 Go to previous messageGo to previous message
stevem is currently offline  stevem
Messages: 4728
Registered: June 2004
Location: NY
Senior Member
JDpinPA17603 the schematics you need are in the 200 A section other then the power supply section with the terrible circuit breakers!

In the A amps you can not apply the B units thermal circuit breaker because the output Transistors are really too far apart, but you can internally bolt on heat sinks to the rear wall panel to cool them faster.

Every 20 degree drop in temp will double the life of a semiconductor, so even doing something like placing a small personal type fan blowing on the rear of the amp is worth it.

The best thing you can do since circuit breakers are so slow to react is to clip them out and install inline fuse holder and then fuses of the same rating.

Another thing all Kustoms Cam use to help protect and stabilize the output stage is a Zobel network added to the output stage.
This consists of about 5 bucks in parts to make it up and 15 minutes to install it
 
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