Tube Amps / Music Electronics
For current discussions, please visit Music Electronics Forum. New: view Recent Searches.
New: visit Schematic Hell!
The sunn still shines online!

Listen to great tunes streaming live right now!

ampage archive

Vintage threads from the first ten years

Search for:  Mode:  

Atchely "hum buster" mod...

6/1/1999 4:07 PM
Dave James
Atchely "hum buster" mod...
Hi All,  
Has anyone out there performed the Atchley "hum buster" mod? I've done it to my '95 MIJ Strat and didn't achieve the level of hum reduction as I anticipated.  
Any input would be a great sanity check.  
Dave James  
6/2/1999 7:32 PM
Steve A.

    I've done the Atcheley thing on 2 or 3 guitars now and the predominant reduction of hum/noise seems to be from the copper foil that I used to line the cavities and pickguard. Isolating the grounds from the signal returns adds in maybe an extra 5% worth of hum reduction. At least that is my take on the situation.  
    If your strat uses a RWRP middle pickup, your guitar should be very hum-free in the #2 and #4 notch positions. With a vintage-style single coil pickup used alone, IMHO you will always pick up some hum when playing in an "RF-noisy" environment.  
    You might look at my articles on the EPI Paul Jr and Tele mods to see how I implemented the "John Atcheley" system:  
Steve Ahola
Book Of The Day The Ultimate Tone, Volume III by Kevin O'Connor
Have you ever wondered if there is a better way to build a Bassman, Champ, Plexi, an 800, AC-30, Bulldog or Portaflex? Or you wanted to build an SVT with off-the-shelf parts? How about a master-volume amp that doesn’t change tone with the master setting? Everything you need to know is right here, including: proper grounding techniques, wiring methods, and mechanical considerations. Eighteen chapters cover the “iconic” amps everyone knows and loves, with schematics and layouts for each, along with the technical history of the product. Eyelet-board and chassis-mounted tube socket construction is used throughout, for easy servicing and modding. TUT3 is very accessible even if you cannot fully read a schematic and is a "must have" if you are going to build an amp for your self.

Note: The Ampage Archive is an Amazon Associate site. A small commission is paid to the site owner on any qualified purchase made after clicking an associate link such as the one above.
6/3/1999 2:04 PM
Dave James

Thanks for the feedback...I'll review your data when I get out of class.  
Yeah, there was "some" reduction (from what particular piece of the mod I'm not sure), but I was hoping for more - oh well...  
Dave James  
   Page 1 of 1