Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Oddvar on October 22, 2016, 08:43:20 am

Title: Hoffman AC30 grounding issue
Post by: Oddvar on October 22, 2016, 08:43:20 am

Hi, I have just finished the Hoffman AC30 build.  I have great sound in it, only trouble is I have a terrible noise which sounds like a grounding issue. Anyone here that can suggest where it could be?  I have followed the Hoffman layout, and checked and doublecheck, but can't seem to find it.  Anyone?

The hum reacts to the cut pot.

Title: Re: Hoffman AC30 grounding issue
Post by: kagliostro on October 22, 2016, 08:47:30 am

Post close up photos, those who are more expert will benefit of it to give you help


Franco

Title: Re: Hoffman AC30 grounding issue
Post by: Oddvar on October 22, 2016, 09:28:56 am

I fixed it, sorry.

Title: Re: Hoffman AC30 grounding issue
Post by: sluckey on October 22, 2016, 10:46:53 am

What did you find wrong?

Also, what's the status of that champ you were asking about a few days ago?