Re: Older Webb Amp -Clipping & Gain loss

Billy Woo · From: Los Angeles, CA, USA

I just played a gig and noticed my Webb amp was acting up, symptoms were loss of gain, clipping if you turned up the volume, afterwards I took it to the local amp repair shop and I did call before hand and asked if they had worked on Webbs before, they said yes well long story short it did the same thing at the gig needless to say I took it back and they said they had to tighten some pots? Could loose pots be the cause for the problems I have been having?

Billy Woo aka
Bronco Billy

Ken Fox · From: Nashville GA USA

The pots do no not use the chassis for ground. In a nutshell, I doubt that was the problem.

Too many things can cause the problems you are having. I fix these amps all the time but there is no way I could guess at what the issue is.

I run a test signal thru them and check them on a load resistor bank with a scope for problems like that. That is the the quickest way I have to locate the problem area in the amp.

Billy Woo · From: Los Angeles, CA, USA

Ken

I'll be trying out the amp on the next gig this Friday but assuming that you are correct and if it is still a problem how would I go about dismantling the chassis to send to you for repair also are you backed up on repairs and can you give me an estimate once you receive it?

Thanks,

Billy

Ken Fox · From: Nashville GA USA

Be more than glad to do it for you. We are OK right now. Usually have amps out in one to three days. We are leaving on the 27th for a few weeks.

John McClung · From: Olympia WA, USA

Billy, do you know the serial number and/or age of your Webb?
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Billy Woo · From: Los Angeles, CA, USA

Hi John

I have not had a chance to get the serial number but I think it's an early 70's model.

Billy
Any chance you coming to the Am Legion tomorrow night Friday to join us?

Lee Jeffriess · From: Vallejo California

Billy, if its still acting up?.
Try Tim Maag in Fullerton, 714 447 8364.
He will get you sorted.
Lee

Billy Woo · From: Los Angeles, CA, USA

Thanks for the info, that would be more convenient than sending if out of state but good news is the amp worked without the gain loss and clipping issues that I had the last time so that's the positive side but I seem to recall when this amp was working fine that if I turned it up to volume (2) it would be plenty loud for normal stage applications, however I noticed that I had to turn the volume up to 6-7 to get decent volume this last time around, does that sound normal?

Thanks,

Billy Woo

Hiro Keitora · From: New York, New York

No, it doesn't sound normal to me...

Same exact thing happened to me, it was weird. And I found the "toggle switch" on EQ section( Not the 3 way in the middle, this is for EQ in or Out) had to be wiggled few times to lose up. And that cured it( for now). Of course this happened in the middle of the show. Oh Well

Come to think of it, years ago, the reverb was acting up, and I found the 1/4" phone jack of the reverb had to be "cleaned".

There might be something we can do to coat the surface with something so it doesn't get corroded again, anyone knows?

<H>

Ken Fox · From: Nashville GA USA

You can use bulb grease from the local auto parts store. I use a similar compound for all reverb connections (especially those pesky Molex connectors).

Hiro Keitora · From: New York, New York

Oh, yeah-yeah, those di-electric cream, you're talking about?

Ken Fox · From: Nashville GA USA

Yes, that is what I use. It has cured the Molex problem and RCA connection problems once those connectors are re-tensioned and a thin coating applied.

I also use it on the normally closed contacts on input jacks, and loop jacks (power amp inputs, preamp inputs, etc)

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