Modding an old peavey amp

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buildafriend
Posts: 12
Joined: Wed May 25, 2011 10:27 pm

Modding an old peavey amp

Post by buildafriend »

I have a Peavey 400BH being used for bass. The limiter in it seems to ruin some of the qualities that I really want to get out of it. Therefore, I want to bypass the limiter.

I am not really sure where the limiting is happening. What should I jump/short out?

schem: ( the second post in this thread ).

http://music-electronics-forum.com/t11461/

PS, this place made me want to build one of these dumble amps.
Well.. thats the end of that.
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Structo
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Location: Oregon

Re: Modding an old peavey amp

Post by Structo »

That is a solid state amp.

The transformers only put out 52v and 16v so it is not suitable for a tube amp.
Tom

Don't let that smoke out!
buildafriend
Posts: 12
Joined: Wed May 25, 2011 10:27 pm

Re: Modding an old peavey amp

Post by buildafriend »

I understand it is not tube. Thanks! Are all solid state amps voided by this community?
Well.. thats the end of that.
Ian444
Posts: 210
Joined: Mon Nov 22, 2010 10:19 pm
Location: Australia

Re: Modding an old peavey amp

Post by Ian444 »

I dunno, but I took a look at your schem, and although I am not unfamiliar with analogue SS circuits and IC's etc, it is a complex schematic and would need someone who works with these on a daily basis to interpret how it works. Most of us are here with tube amps in mind. Now that I said that, some smart-ass will proly chime in and prove me wrong.
Last edited by Ian444 on Fri May 27, 2011 6:28 am, edited 1 time in total.
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rdjones
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Re: Modding an old peavey amp

Post by rdjones »

buildafriend wrote:I am not really sure where the limiting is happening. What should I jump/short out?
There appears to be a switch at the input to U1C, pin 8.
Does that not control the limiter ?

Defeating the limiter on a Peavey power amp will allow clipping to occur, which in turn may cause 'bad things' to happen.
Proceed with caution.

reddog

p.s. - not tryin' t' be a smart-ass :wink:
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