Tube amp volume fluctuation?

Re: Tube amp volume fluctuation?

Ok, if I'm replacing the 6l6's and I wanted to make the 5150 as warm as possible...what would I go with?
 
Re: Tube amp volume fluctuation?

If not the tubes it could be the output tranny or something else making an intermittent connection...

Aren't you running the amp with a Palmer box or something?
 
Re: Tube amp volume fluctuation?

If not the tubes it could be the output tranny or something else making an intermittent connection...

Aren't you running the amp with a Palmer box or something?

Not recently no. My cable is a junker lol. But I have never experienced volume flux with one. Got a show this weekend, guess I'll find out.
 
Re: Tube amp volume fluctuation?

K, how about getting a speaker cable that isn't junk?

Bad speaker cables not only kill tone, but can kill amps too.
 
Re: Tube amp volume fluctuation?

My amps been doing this recently as well. I was thinking Tubes, but wasn't certain. Is there anyway an average joe could figure out if it was something else?

I'm running good quality cables so I doubt that is it.

The owners manual says tubes are 4 EL84s. So what would be a good replacement?
 
Re: Tube amp volume fluctuation?

My amps been doing this recently as well. I was thinking Tubes, but wasn't certain. Is there anyway an average joe could figure out if it was something else?

The easiest way to check the tubes is to turn the amp on & up and with nothing plugged in, gently tap on each power tube with something metal like a screwdriver or letter opener. All the tubes are going to make some noise... bad tubes will make LOTS of noise!

Check to see that they're all firmly planted in the sockets too... do that first and see if there's any corression & funk on the pins. If the amp spends most of it's time in a basement or some other damp enviornment that can cause problems... time to break out the contact cleaner!
 
Re: Tube amp volume fluctuation?

This is why it's a good idea to always keep your old tubes handy, or have a bunch of spares lying around. Anytime something fishy happens, you can troubleshoot it with your other tubes.

First, change the power tubes. If it's still acting up, then change the pre tubes.
If it's still happening, clean all the jacks and turn all the knobs. After that, it's most likely a cold solder joint or a capacitor on it's last leg.
 
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