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Flux me

 
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twangster



Joined: 05 Aug 2005
Posts: 9513
Location: Nashville Tennessee.

PostPosted: Sun Jul 18, 2010 10:53 pm    Post subject: Flux me Reply with quote

The Supro lap steel pick up arrived.



I roughed it into the project guitar and got the weirdest result, the High E had almost no output and the B string sounded choked like it was being stopped from vibrating somehow , just weird. Pole screw adjustments made it even crazier.

The pup looks like this inside, the magnets are at each end. ( web pic ) They're fastened in place by the four screws through the top plate.

.

I got researching ( thanks Jason Lollar) and discovered that if the magnets have ever been flipped incorrectly it can cause flux zones that interfere with themselves . I flipped away , lo and behold the thing came alive, just roared, instant Cooder.

I had no idea the field could cause problems as drastic as that. Learn somethin' new every day.
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Structo



Joined: 21 Nov 2004
Posts: 26415
Location: Salem, OR

PostPosted: Mon Jul 19, 2010 7:34 am    Post subject: Reply with quote

Glad the research paid off Mark.
Magnetics can get into weird territories.

I love some of the Cooder I have heard on movie sound tracks for years.
He can really change the mood of the moment with that slide.
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twangster



Joined: 05 Aug 2005
Posts: 9513
Location: Nashville Tennessee.

PostPosted: Mon Jul 19, 2010 11:37 am    Post subject: Reply with quote

Strange way to build a pick up, but it was a long time ago. The two coils are also reverse phase which makes it interesting incorporating another pup .

Very hot output & nice break up , yet the notes are as clear as a bell at volume .
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rhardman



Joined: 11 Sep 2008
Posts: 4422
Location: Chicago, not ready for reform, yet

PostPosted: Mon Jul 19, 2010 2:52 pm    Post subject: Reply with quote

very interesting design!!!

In a lot of respects,similar to the old Ric horseshoe pup
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