KuchDaddy
Member
Hello! I've been lurking here for a while, but this is my first post. Seems like some very cool people here. I have learned a lot!!
I play mostly acoustic, but my son is a metalhead and we recently purchased a Rectoverb series 1 combo from e-bay and we have been trying to troubleshoot a few issues with it.
The biggest issue it had was wacky microphonic squealing when using the efftects loop. The amp has (allegedly) brand new JJ tesla power tubes, but the preamp tubes were old, so we replaced all 5 of them with Electroharmonix 12AX7EH's with a balanced tube in the phase inverter position. That totally fixed the effects loop, which was nice, but we are still having other issues, which I still think might be tube related and I am wondering if we got some defective tubes.
The problems are:
1) VERY loud huming on the lead channel. This problem is intermittent and there seems to be no rhyme or reason as to when it happens.
2) General random noisiness, pops and crackles. Again this is intermittent and only on the lead channel, but seperate from the humming described above.
3) The reverb on the rhythm channel sounds like utter crap. Apparently the reverb tank didn't used to work at all until the previous owner replaced the reverb tank and cables with brand new ones. Now it works (I guess), but sounds bad.
I was wondering if any of you folks might have any ideas about what else to try before I take it to a shop. I guess it's possible that one or more of my new tubes are bad. Maybe I should have bought a spare to swap around.
Thanks in advance!!
I play mostly acoustic, but my son is a metalhead and we recently purchased a Rectoverb series 1 combo from e-bay and we have been trying to troubleshoot a few issues with it.
The biggest issue it had was wacky microphonic squealing when using the efftects loop. The amp has (allegedly) brand new JJ tesla power tubes, but the preamp tubes were old, so we replaced all 5 of them with Electroharmonix 12AX7EH's with a balanced tube in the phase inverter position. That totally fixed the effects loop, which was nice, but we are still having other issues, which I still think might be tube related and I am wondering if we got some defective tubes.
The problems are:
1) VERY loud huming on the lead channel. This problem is intermittent and there seems to be no rhyme or reason as to when it happens.
2) General random noisiness, pops and crackles. Again this is intermittent and only on the lead channel, but seperate from the humming described above.
3) The reverb on the rhythm channel sounds like utter crap. Apparently the reverb tank didn't used to work at all until the previous owner replaced the reverb tank and cables with brand new ones. Now it works (I guess), but sounds bad.
I was wondering if any of you folks might have any ideas about what else to try before I take it to a shop. I guess it's possible that one or more of my new tubes are bad. Maybe I should have bought a spare to swap around.
Thanks in advance!!