Home » VintageKustom.com » Repairing Kustom Amps » Lead III cutting off (My lead III will run for about 3 minutes then turn off.)
Re: Lead III cutting off [message #26098 is a reply to message #26097] Tue, 09 May 2017 06:00 Go to previous messageGo to previous message
stevem is currently offline  stevem
Messages: 4733
Registered: June 2004
Location: NY
Senior Member
These amps like many other model Kustoms are built with thermal circuit breakers that on the schematics are called thermostats.
These are designed to open up the AC wall voltage going to your amp if the running temperature of the output stage exceeds 182 degrees F.
This is the likely cause of your amp shutting down after only 3 minutes of bring played, or even just being on in some caes.
Can you read a schematic, post back a reply and I will explain to you how to proceed.
This is a easy fix, so don't sweat it!
 
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