JDinPA17603 Messages: 69 Registered: May 2018 Location: Lancaster, PA
Member
If you come up with a copy I can use one for the 200 with the circuit breakers. Also wondering if we could retrofit the A models with circuit protection like the B models have easily.
Old Us Navy Vietnam Vet
Playing for my own enjoyment and irritation of the neighbors.
stevem Messages: 4736 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
JDinPA17603 Messages: 69 Registered: May 2018 Location: Lancaster, PA
Member
[My comments added in line.
quote title=stevem wrote on Thu, 21 March 2019 07:55]JDpinPA17603 the schematics you need are in the 200 A section other then the power supply section with the terrible circuit breakers! Got them.
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. Can do.
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. Did not realize it was that much of a factor.
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. <grin>
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 [/quote] I will investigate these. Do you have a recommended set of values for use asa guitar amp? Would the amp used for bass require different values.
?
Thanks again Steve for your help and information.
John
Old Us Navy Vietnam Vet
Playing for my own enjoyment and irritation of the neighbors.