Bad tube?

Updated December 04, 2009 00:04

I was just playing through my Laney when the sound just dropped out and left a a kinda soft static sound. When i crank up the volume you can hear the guitar come through (under the static) clean, even on the distortion channel. Its not the guitar cable either. I haven't really used the amp a whole lot, and at low volumes if i do. I don't know why the tubes would be bad already. Is there a way i can test to find he culprit?

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Yetti1 wrote November 23, 2009 04:26

Most likely its a bad pre tube thats the culprit...if you have already eliminated the cable, and any other lines. Its most likely a tube.
If it is, you will experience symptoms such as that, volume drops little to no distortion, crackeling, squeeling ect. Tubes generally should be changed annually.

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Brono wrote November 23, 2009 05:36

how do you find which tube is bad? or replace them all?

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Brono wrote November 24, 2009 06:24

i tried all that and im thinking maybe its not a bad tube now. All the tubes are glowing about the same, ive tapped on all of them and nothing happened. Im starting to worry now.

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Brono wrote November 24, 2009 07:05

I just tried swapping all the tubes around and now theres no crackling (barley any anyway) but the distortion channel is completely clean, no gain at all. I can adjust the volume, so it isnt a power tube. I guess its probably the pre-amp tubes?
If it were something wrong with the amp swapping the tubes shouldn't really have an effect right?

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