My SVT is Cutting out. Any tips before i take it to my tech? He told me to check the preamp tubes.
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AMPEG SVT-CL Help
- Thread starter ItsMichaelYeah
- Start date
When you say cutting out, is it intermittent or does the amp give off the flashing fault lights and shut down completely?
Have you checked all of the tubes and made sure they were illuminated? Tried multiple basses/cables and still had the same issue?
I know checking the basses and cables might sound like a douchey suggestion, but I had a similar occurence with my CL and it was, in fact, my bass that was the problem. And quite embarassing that I did not check that first.
Sanchez83 said:
Tried different instrument cables and even different speaker cables and tried 3 diffrent basses.
Gotcha. Sounds like taking it in to your tech is a pretty good idea at this point. Even with a bad tube, I guess I would expect that the amp would be showing some sort of fault.
If you have known working pre tubes you can swap the others out with, try that before taking it in. He could be right.
Yup, if you're handy with a screwdriver, pull the 4 screws on top and ease out the preamp. Swap those 2 out if you have some good 12AX7s.
yeah, i had some simple problems with my svtII when i got it
signal would get weak intermittently, sometimes a bit of static sounding noise
tried putting a patch cable into the effect send/return jacks (or preamp out/amp in) and it didn't help
took it to my tech after it started cutting out intermittently in a more consistent fashion
he said it wouldn't pass signal and it was the amp in jack, he cleaned it and it worked fine after that
then it did the same thing recently except almost everytime i could flip it on standby and back off real quick and it would start working normal again
so i plugged my bass into the amp in jack again, power section worked fine
told my tech and he said it sounded like an intermittently working tube
i have a phono amp that takes 12ax7 tubes so i pulled the preamp tubes outta the svt and put them in my phono amp, a 6 month old reissue tung sol that was in the V3 slot had a dead triode so put a vintage 12ax7 in the svt that i had...has worked fine since...
so give those two things a try
patch cable in the effects loop or preampout/amp in jacks...
also when it cuts out plug your bass into the amp in effects return jack and see if your power section is working ok...
signal would get weak intermittently, sometimes a bit of static sounding noise
tried putting a patch cable into the effect send/return jacks (or preamp out/amp in) and it didn't help
took it to my tech after it started cutting out intermittently in a more consistent fashion
he said it wouldn't pass signal and it was the amp in jack, he cleaned it and it worked fine after that
then it did the same thing recently except almost everytime i could flip it on standby and back off real quick and it would start working normal again
so i plugged my bass into the amp in jack again, power section worked fine
told my tech and he said it sounded like an intermittently working tube
i have a phono amp that takes 12ax7 tubes so i pulled the preamp tubes outta the svt and put them in my phono amp, a 6 month old reissue tung sol that was in the V3 slot had a dead triode so put a vintage 12ax7 in the svt that i had...has worked fine since...
so give those two things a try
patch cable in the effects loop or preampout/amp in jacks...
also when it cuts out plug your bass into the amp in effects return jack and see if your power section is working ok...
JimmyM said:Well thx Michael, but I hardly did anything. I just told you what the tech told you
That helps me confirm he's correct. He really hates working on ampegs. I practically have to beg him all the time!
BTW swapping preamp tubes worked!
Still going to take it in and give it a nice look over
