Hi Stuart,
I have owned three (3) Audiomat Amps over the last few years, I have always prefered the stock/original power tubes to change outs with NOS units, this was with amps that used EL-34's and the one amp that uses 6550's.
A good source for service, repairs, and even purchase of original correct Audiomat replacement tubes is Nick Gowan, he can be found at --tsound.com---. It is my understanding Nick is an approved service center for Audiomat and he will give you honest opinions.
As usual, you may receive 50 different opinions,
Steve
I have owned three (3) Audiomat Amps over the last few years, I have always prefered the stock/original power tubes to change outs with NOS units, this was with amps that used EL-34's and the one amp that uses 6550's.
A good source for service, repairs, and even purchase of original correct Audiomat replacement tubes is Nick Gowan, he can be found at --tsound.com---. It is my understanding Nick is an approved service center for Audiomat and he will give you honest opinions.
As usual, you may receive 50 different opinions,
Steve