F-50 tubes bad?

[lennon08]

I just bought a F-50 head. There is some real fuzz sounds coming from the amp, especially when I play an E. Also, there seem to be what I would call phantom noises when it is on. It is quiet with the standby but not when the standby is off. I am not playing loud, maybe 1-2 range.

Could this be bad tubes? If so does that mean preamp or power? As you can tell I am not very technical. I just know what I like!

Thanks for any ideas.

 

[fishyfishfish]

I would check all the pre-amp tubes. I think the F-100 only has four pre-amp tubes, so check it out. I had almost the same problem you described on my DR. and it almost drove me nuts finding the sucker.

 

[lennon08]

Thanks, I have replaced the power tubes yesterday and the amp now rocks! I have on order new preamp's so that will get done when they arrive.

I love that these are self biasing amps. What a money saver!