Len Rabinowitz
Well-known member
- Joined
- Apr 4, 2014
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Hi all-
My 5:25 Express Plus head has started doing something strange. When in 5 watt mode there is this low "hummmmm" noise. It does it on both channels and with different guitars, but only on the 5 watt setting.
Since 5 watts runs one power tube, a bad power tube was my initial thought. However I put in another set of tubes and still got it. However the tubes I put in, while I believe they are a matched pair, are not Mesa tubes, so maybe that is still it?
Thoughts? Could it be preamp tubes or something else?
Thanks!
My 5:25 Express Plus head has started doing something strange. When in 5 watt mode there is this low "hummmmm" noise. It does it on both channels and with different guitars, but only on the 5 watt setting.
Since 5 watts runs one power tube, a bad power tube was my initial thought. However I put in another set of tubes and still got it. However the tubes I put in, while I believe they are a matched pair, are not Mesa tubes, so maybe that is still it?
Thoughts? Could it be preamp tubes or something else?
Thanks!