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Grateful Dead Music Forum

A place to talk about the music of the Grateful Dead 

 #97794  by unnbrokenchain
 Wed May 04, 2011 7:03 pm
If anyone could help me out I'd greatly appreciate it. I have a Carvin sh65 which I recently had to rewire the entire thing. I thought I could rewire it and have failed miserably. If anyone could layout a wiring schematic I would :hail: :hail: :hail: praise you.

I have two humbuckers (carvin)
1 Volume pot
1 Tone pot
3 way pickup switch
OBEL
Waldo Preamp
Two coil splitting switches (one for each pickup)

Once again thanks!
 #104731  by hawk900
 Wed Oct 26, 2011 6:20 pm
Actualy the middle humbucker is flipped so the north start and south start are joined together(green&red) and connected to switch unlike the one right beside it which standard coil split north&south finished(black&white). This is done so the magnetic polarity is in order "in phase" and two pickups can be used at the same time in single coil mode(cleanest dp104setting)with same cleanliness and zero hum more harmonic power eg 5way selector neck on middle on both split acting as two single coils great for lead boost or bridge on middle on aka used with mutron3 envelope position.
 #104735  by waldo041
 Wed Oct 26, 2011 7:14 pm
hawk900 wrote:Actualy the middle humbucker is flipped so the north start and south start are joined together(green&red) and connected to switch unlike the one right beside it which standard coil split north&south finished(black&white). This is done so the magnetic polarity is in order "in phase" and two pickups can be used at the same time in single coil mode(cleanest dp104setting)with same cleanliness and zero hum more harmonic power eg 5way selector neck on middle on both split acting as two single coils great for lead boost or bridge on middle on aka used with mutron3 envelope position.
hey hawk, the wires are switched up so that the magnetic polarity is in order? wouldn't the actual physical flip of the humbucker be for the magnetic polarity, and if so what does the rewiring of the "start"s have to do with the humcancelling effect?

peace,
waldo
 #104775  by hawk900
 Thu Oct 27, 2011 5:24 pm
It's my bad on this part because this isn't an open pickup cavity. It's a standard gibson with wood seperating the two buckers magnets. My theory is from off of your site as per Gary Brawer is when there is an open cavity and 3 buckers stacked and coil split with the ability to use the middle in conjunction with the neck or bridge while being split and in phase(no hum). Youre reversing the magnet polarity by flipping it so there are not out phase and wiring it reverse because it's flipped and the coil of choice when split is active. aka the south coils are the active ones on all 3. Just like the rosebud:
Image

Image

Sorry about that.
hawk.