Bare Knuckle Pickups Forum

Forum Ringside => Guitars, Amps and Effects => Topic started by: markofled on March 27, 2007, 09:57:26 PM

Title: Problem with GH50L
Post by: markofled on March 27, 2007, 09:57:26 PM

When i have the effects loop on, the amp tend to intermittently drop in volume. At first i thought i might be a faulty tube, but i dont seem to have a problem when the loop is turned off. I know a few people have GH50L just wondering if anyone could offer any advice?

Title: Problem with GH50L
Post by: Crazy_Joe on March 27, 2007, 10:05:28 PM

There is a trick on the GH50L where if you have the switch on 'insert' which i the middle switch on the FX loop thing then it acts as a power attenuator so if you turn the effects loop knob down then it will attenuate more and hence why it is so quiet.

You might want to check if you have done that.

Title: Problem with GH50L
Post by: LazyNinja on March 28, 2007, 01:31:53 PM

He says the volume drops intermittently, so I don't think that's what he did. I would have thought tube as well. I'm not sure if the FX loop on a GH50L is tube buffered. If it is, then you need to replace that preamp tube, which I think, will be the last one.

Title: Problem with GH50L
Post by: TwilightOdyssey on March 28, 2007, 02:43:05 PM

That can signal something very wrong for the amp! Take it to a qualified tech before proceeding!!

Title: Problem with GH50L
Post by: markofled on March 28, 2007, 03:45:47 PM

im going to replace the preamp tubes if that dont make any difference then i will take it to an amp tech. Can anyone recommend a good one in the southwest london area? Thanx for your help   :)

Title: Problem with GH50L
Post by: nillox on March 28, 2007, 05:25:09 PM

i think iv the same problem with my gh50l, when i put my ns2 into the loop at gets noisyer and loss of tone, but i dont use my fx loop alot so it doesnt bother me that much

Title: Problem with GH50L
Post by: markofled on March 28, 2007, 07:02:52 PM

ive fitted new preamp tubes and i still have the problem. Im using my fx loop alot at the moment my clone theory is to noisy infront of the amp. Anyway it looks like ill have to take it to a tech  :cry:

Title: Problem with GH50L
Post by: nillox on March 28, 2007, 10:06:28 PM

if your tech fixes the problem please post what was wrong n how it was fixed.  i might have to do repairs myself cuz no guitar shops like laney in ireland

Title: Problem with GH50L
Post by: DeanS on March 28, 2007, 10:09:36 PM

Can anyone recommend a good one in the southwest london area? Thanx for your help   :)[/quote]

I use Steve Rowse in Godalming.