| Author |
Topic: Early Ric pickup question |
John Dahms
From:
Perkasie, Pennsylvania, USA
|
Posted 24 Oct 2005 6:06 pm |
|
| I've got an early (ca.'35) B6 pickup that needs attention. It's one of those with only 1 wire. There is no continuity between the winding and any of the pole pieces or any pole to another. What will I find at the beginning of the wrap under all that wire? I've never worked on a pickup configured like this before. There were always 2 leads. Any insight? |
|
|
 |
Bill Creller
From:
Saginaw, Michigan, USA (deceased)
|
Posted 24 Oct 2005 8:00 pm
|
|
| Rick knows the answer to that I believe.The ground end of the coil is on a pole which contacts the base plate bracket I believe. If that wire is inside the bobbin, your next item is to contact Jason Lollar. |
|
|
|
Rick Aiello
From:
Berryville, VA USA
|
Posted 25 Oct 2005 5:32 am
|
|
As Bill has said ... the "ground end" of the coil is attached to one of the pole pieces ... usually the 1st or 6th.
These are usually seen on the oldest of frypans ...
The pole piece then grounds to the horseshoe magnet ... then to the mounting plate ... then to body of the frypan ... then to the 1/4" jack .
Recently I saw one in a '35 B6.
In that guitar ... there was a "grounding loop" secured to the # 6-32 bobbin mounting screw (as found in later Ricky pups) ... which then ran to the 1/4" ... since the body of the steel could not conduct as a frypan does.
Before unwinding ... I suggest taking the bobbin out ... sanding the corrosion off the pole piece bottoms (all of them) ... and the magnets inner surface ...
If that doesn't work ... lay in a small piece of conductive foil ... between the bobbin and the magnet ...
------------------
Aiello's House of Gauss
My wife and I don't think alike. She donates money to the homeless and I donate money to the topless! ... R. Dangerfield
|
|
|
|
John Dahms
From:
Perkasie, Pennsylvania, USA
|
Posted 30 Oct 2005 12:15 pm
|
|
Well, I got down to the end of the windings and sure enough under the masking tape was a section of bakelite bobbin that had been ground through to expose the pole piece where the start winding had been placed to make contact. Not like any other p.u. I've seen. There was clearly visible corrosion at one spot where I assume my problem was. Does anyone (Rick, how about you) know of an advantage to using this grounded pole system (less noise, etc?) or would I be better off simply drilling a small hole in the bobbin and feeding the start winding out like any other pickup? I know I have one of perhaps only a hundred or so pickups made like this but if it was an evolutionary dead end why would I want to recreate the same mistake.
I'm going to post a link to a picture of the bobbin (my first attempt at such) I hope it works.
I'll be away most of next week but would welcome opinions before I get back on this project when I return. Thanks.
 [This message was edited by John Dahms on 30 October 2005 at 01:37 PM.] |
|
|
|
John Dahms
From:
Perkasie, Pennsylvania, USA
|
Posted 30 Oct 2005 12:16 pm
|
|
Holy crap! If anyone knows how to shrink the picture-please do.
And maybe tell me how to not have that happen again. |
|
|
|
Rick Aiello
From:
Berryville, VA USA
|
Posted 30 Oct 2005 12:29 pm
|
|
Jason Lollar rewinds those types ... the "normal" way.
There is no advantage to this grounding method ...
As far as being "original" ... its rewound anyway now ... so the more stable ... the better.
As for the pictures ... resize to 650 pixel width ... and it'll fit without stretching the screen out ... 
------------------
Aiello's House of Gauss
My wife and I don't think alike. She donates money to the homeless and I donate money to the topless! ... R. Dangerfield
|
|
|
|
