Recent content by dgr888

Bump this back up to the top for new users to see...this mod works Ya'll....cures a lot of hum/buzz generated in these amps....

Thanks again Val.....Most who have these did not/do not realize that these came new like this and have always thought (or been told) the hum/noise was just the way it was designed,(Correct but designed wrong). I've been fixing this "problem " since the 80's for my customers which should have...

Thanks Val for the response. You and other members can finally enjoy these amps without the hum. I'm glad for the responses to help keep this thread alive as there are so many of theses amps out there with this problem and it is fairly a simple fix to make. Boogie won't fix them so we will...

Makes sure your tech has checked the .05 600v cap that is on the switch itself as this will cause problems like this.

If it has reverb check out the reverb hum fix post. It's usually an annoying lower level hum on the clean side then is really obnoxious when switch to the lead side. This fix cleans up this noise on the reverb based amps...

Thanks for the replies to this and please keep posting letting other members know of how it does with the other models besides the Mark series.

Members let everyone one know how this worked on your Mark 3's etc. and any other models. Over 1200 views so let's keep the other members informed as that's what these boards are for....

The drive side of the reverb circuit and the recovery side are two separate circuits not one.. Tube amps can be designed to be quiet, it's just we are accustomed to and made to think it is normal for them to have noise. And yes to some it doesn't matter but to some it does. For the price paid...

Yes it can be replaced. Your tech will have to try a few of these because of the variances some will perform better/quicker than others.

photo g's post says they are using relays in the mark5 so it should be resolved in that model but the mark 4 still uses LDR's and could develop the same kind of issues over time.

Neither is a "Boogie"..

Great deal hope you can get it running good...

I know from repairing these since the 80's when this fix came out it caused and still causes a ground loop/condition which IS fedback thru the ground not the single conductor. Noise travels between grounds when they are at different potentials. The problem is the grounding design scheme on the...

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"Namm" is being Ridiculous with pricing.. I think you've got that backwards..........