output valve not receiving power

Just to clarify: are you saying that none of the output tubes will work in 'the very first tube (socket) if you start counting from front to back, left to right'? Or that all the tubes work, but the amp blows fuses pretty quickly? Or, one of the tubes (the glass things) does not work in any of the sockets? Not trying to give you a hard time... just trying to understand the problem.

 

Fuses blowing is a symptom of a deeper problem and it sounds like something that will require a qualified tech to fix.

 

That was my first reaction if it is blowing Fuses stop putting in new fuses you will only cause more damage.

 

Could be another blown power tube. Tubes are like that...most will work great for years, and one could blow on you tomorrow, even if it's new. At any rate, I know nothing about Mesa tube amps other than that. And it's always best to get some pro help unless you can narrow down the broken tube yourself.

 

When you say the tubes “light up” do you mean that the heaters are working, orange glow in the centre of the tube, or do you mean the blue glow that signifies the tubes are conducting?

 

Contact customer service, generally we would recommend a factory authorized service shop to handle repairs as they will have the necessary experience and documentation to service this properly.

"Friends" generally aren't equipped to service these things properly with the needed attention to detail.

 

If your putting other good tubes in the socket and they don't light up. Then its not getting heater voltage. So its need to be fixed. But if other heaters are working and one socket doesn't then connections have broke lose and other sockets need to be looked at and touched up. So it don't happen again. Common stuff needs a little extra care and look over so gigging won't find basic stuff that preventive maintenance would have fixed

 

I mentioned this because the factory techs do see quite a few amps from techs in the field that just don't have the experience with the product and don't know the revision history or what specifically to look for. It's better (and a lot cheaper) if they don't have to undo incorrect previous repair attempts.

The glow from the heater may mean nothing at all, or it may be part of the problem (unlikely).

 

Cool, then follow up with him and suggest that he contact service center tech. support.