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After a while, TMB channel cuts out but normal still works fine. With VRM right up I can just about hear the TMB but when first switched on both are the same. It's happened a couple of times now when adding the pedal board but that works with other amps and it seems strange that it only affects one channel. I've fudged around with a stick and seems ok!

It's definitely a problem when plugging in the pedal board- but only with the TMB channel which comes back in when VRM is up to half or more. Any one else had this?

probably a bad solder joint on the TMB side. When it happens, leave it on and then measure the voltage to see if there are at spec or not. Good to do when it is working fine as well.
could be a bad tube too.

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Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

changed the tubes and all is well. took it for a spin last night and sounded great,

Do you know which tube fixed the problem? If it was just TMB channel, I suspect the cathode follower tube, V2

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Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

Sorry, no. I changed all three. Just wanted to get it going again.