SVT-VR trouble please help

[pig]

So here's the story. I had a gig last weekend, during soundcheck everything was going fine. After sound check my guitarist and I decided that our amps should swap places.
I plug back in and get no volume from channel 1. I crank it to max, I had my bass volume cranked and still barely any signal. So I plugged in to channel 2 and everything worked fine. I just bought this amp brand new about a month ago. What the hell is the problem? Why would channel 1 not work in both normal and bright inputs? and why does channel 2 still sound perfect? please

[johnk_10]

it could be a bad preamp tube in channel 1 or the amp was bounced in transit. can you check if channel ones tubes are lighting up?

[pig]

From what I can see all the power tubes are glowing, and so is the ax7. As for the 2 12au7's I can't tell if they are glowing. They definately arent glowing as bright as the 12ax7. Even if those 2 tubes are busted why would channel 2 still work? Does channel 2 bi-pass the preamp?

Oh and also the Bias control 1 light is on.

[johnk_10]

you're looking at the driver and output tubes, not the preamp tubes. they're up top.

[i_got_a_mohawk]

They can still glow but not be working. The glow just means the heater elements are fine.

It is possible you maybe knocked one of the tubes when you moved it from one side of the stage to the other. The thin metal structure of the inside of tubes is more maliable when heated.

[BassmanPaul]

You have a new amp with a warranty. Take the thing back and have it replaced or repaired. That's what a warranty is for.

Paul

[pig]

Originally Posted by BassmanPaul

You have a new amp with a warranty. Take the thing back and have it replaced or repaired. That's what a warranty is for.

Paul

No warranty on tubes.

[johnk_10]

it may not even be a tube, but i'd still check your PREAMP tubes, not the poweramp tubes.

[BassmanPaul]

Originally Posted by johnk_10

it may not even be a tube, but i'd still check your PREAMP tubes, not the poweramp tubes.

Precisely why it should go back.

Paul

[Tim1]

Agree with johnk. Most likely a channel one preamp tube. Anyway use the warranty - if you start fiddling you may void the warranty. I think there may be a 90 day warranty on the tubes???

[pig]

Originally Posted by Tim1

Agree with johnk. Most likely a channel one preamp tube. Anyway use the warranty - if you start fiddling you may void the warranty. I think there may be a 90 day warranty on the tubes???

Yeah I think you may be right. Guess Ill take er back.