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The heat of an OTL is like it is with any other amp- the heat is based on the class of service rather than the number of tubes. The exception might be if you run an amplifier using 6C33s (OTL or not), which run unusually hot!
If our amps are on Standby, after a day of that you can easily grab a power tube and hang on without burns. But start the amp from stone cold take it out of Standby to full On and after a minute of operation, its too hot to touch!
If you had a solid state amp of 225 watts that run class A, you would find it making a very similar amount of heat!
The heat of an OTL is like it is with any other amp- the heat is based on the class of service rather than the number of tubes. The exception might be if you run an amplifier using 6C33s (OTL or not), which run unusually hot!
If our amps are on Standby, after a day of that you can easily grab a power tube and hang on without burns. But start the amp from stone cold take it out of Standby to full On and after a minute of operation, its too hot to touch!
If you had a solid state amp of 225 watts that run class A, you would find it making a very similar amount of heat!