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Post subject: Pro Tube Twin Output Dropped
Posted: Thu Feb 24, 2011 7:00 pm
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Hey All,
I have a Pro Tube Twin, not sure how old the chassis is but I got her going as a head. Played great for months with limited use, maybe a handful of hours. Now, suddenly, the output has dropped considerably. Checked the speakers, they're fine. All tubes light up. The 'trouble' lights on the rear are both green. So, where do I begin troubleshooting? I'm comfortable with just about anything (thanks to the experts here) but still a newbie. What steps do I take to find the problem? Thanks.


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Post subject: Re: Pro Tube Twin Output Dropped
Posted: Thu Feb 24, 2011 7:02 pm
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Joined: Wed Mar 31, 2010 12:48 am
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Output tubes?

It might be time for some new bottles.

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Post subject: Re: Pro Tube Twin Output Dropped
Posted: Fri Feb 25, 2011 8:22 am
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Arjay,
That was my first thought too but these tubes were new and don't have hardly any hours on them. This amp can (supposedly) be balanced and biased from adjustments on the back panel. Is that the first place to start or should I just try a new set of tubes? Thanks for the help.

James


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