I'm having a feedback issues with my guitar pedals. Any help please?

[FreakyStyley]

I use a Gibson SG Special Faded guitar,

1983 white Marshall JCM 800 lead series 100watt amp.

 

The pedals I use range between Boss overdrive SD1, delay, holy grail reverb, etc. I do -not- have an effects loop on my amp, as it's so old.

 

I've been having huge feedback problems with it (And loud humming, fuzzing, etc). Only when the pedals are in the connection though. More common feedback is with the overdrive. I play far from the stack, so wave frequency shouldn't be a problem. The tubes on the amp are 10 years old, but that shouldn't be a problem as there's no feedback without the pedals.

 

A major difference has been showed when I use different power supplies, yet even the Boss brand name power supply on the Boss overdrive gave me gross fuzz and feedback.

 

Any suggestions?

[The*Ataris]

Is your Preamp Gain dimed by chance? I have a JMP 2203, and if I had the preamp cranked, the master cooking, and an overdrive slamming the front end, I'd have similar problem to what you're describing...

Set your pedals to unity gain?

[murch33]

If you had the "preamp cranked, the master cooking, and an overdrive slamming the front end", exactly how goddamn loud is that?

[Oblivion DC]

Try putting in one pedal at a time and seeing if any of them feed back by themselves. If there isn't any feedback when you go directly into the amp, but it starts howling when you start putting pedals in, maybe you're driving the preamp too much. Or maybe you aren't driving it too much, but one of your preamp tubes is going microphonic and just can't handle getting hit as hard as you're hitting it. I'd try some new tubes too.

Good luck.

[The*Ataris]

Originally posted by murch33 If you had the "preamp cranked, the master cooking, and an overdrive slamming the front end", exactly how goddamn loud is that?

Like "flapping pants" loud with no distinguishable chord voicings

I bet that works for a lot of people actually...

[FreakyStyley]

Thanks Oblivion,
I'll try that. I think the major problem is the power supplies i use, because I get different levels of feedback depending on which i use. I'm just gonna screw around with it a lot until i get what I like. The tone kicks serious ass and it feels like a nice kick in the face, but it's a kick in the face with poop on the shoe right now with all that feedback inbetween shredding. thanks

[FreakyStyley]

Originally posted by The*Ataris Like "flapping pants" loud with no distinguishable chord voicings

I couldn't say it better.

This was my face when i first lost my Marshall virginity ->

Permanently retarded now.

[StratStevo]

What is the size of the room you are unleashing 100 watts into?

[L6Sguy]

Originally posted by FreakyStyley Thanks Oblivion, I'll try that. I think the major problem is the power supplies i use, because I get different levels of feedback depending on which i use.

 

 

the different 'voicings' of the noise associated with different power supplies doesnt necessarily mean that they are the problem. have you tried things with batteries yet?

 

and do you have gain/pre levels somewhere set to 10?

 

10 years on power tubes that have been used with any volume for that span are very likely in need of replacing anyways. the pedals are just helping to let you know that.