ugh. wiring confusion SHPR-1

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edtheward

New member
Hello, first time poster. just bought a SHPR-1 and am installing it in my single pickup 87 SG junior. it has one volume, one tone, no toggle. I am following the diagram that came with the pickup. everything seemed right to me, but I am getting no sound. the input jack has a hot black braided with a ground. I am using push pull pots to try and get 4 sounds. The included diagram for this configuration includes a toggle switch because it is showing 2 pickups instead of one ( like my configuration) but with eliminating any wiring from the neck pickup part of the diagram it still looks right to me, but obviously it is not.

ant help? I could probably post pics if that would be easier to pick out my mistakes.
 
Re: ugh. wiring confusion SHPR-1

volume pot- top red and black going to other pot.


volumepp1.jpg
 
Re: ugh. wiring confusion SHPR-1

holy crap that looks completely different. god bless you. I'll let you know how it turns out. is there a proper way to test pots to see if they are fried? with a meter perhaps?
 
Re: ugh. wiring confusion SHPR-1

To test the pot set the multimeter to measure resistance and test across one side and the wiper (middle terminal), making sure the pot is at either extent (1 or 10 as we know it). One side should read the value of the pot (+/- 10%) while the other will read close to zero, if not zero.

To test the push/pull portion all that is needed is a simple continuity test. Test across the common (middle) and an outer terminal.

Regarding the diagram... hermetico, what was the reasoning behind connecting the commons on each pole and then connecting the two switches with the "X" (I know there's no connection in the middle of the X, it's the only way I can think to refer to it)? Because two push pulls can give you four positions for two humbuckers, only one pole is needed on each switch for a single pickup guitar. As drawn, remove the two wires making that "X" and remove the jumpers between the commons and it still works. Also, the two single coil tones are switched. As currently drawn the volume "up" and tone "down" is the P90, not the rail. ;)

Beyond all that, edtheward, double check your connections... a few of the terminal/wire solder points look a little dry in the photographs. A single poor connection can kill the entire circuit.
 
Re: ugh. wiring confusion SHPR-1

MikeS said:
To test the pot set the multimeter to measure resistance and test across one side and the wiper (middle terminal), making sure the pot is at either extent (1 or 10 as we know it). One side should read the value of the pot (+/- 10%) while the other will read close to zero, if not zero.

To test the push/pull portion all that is needed is a simple continuity test. Test across the common (middle) and an outer terminal.

Regarding the diagram... hermetico, what was the reasoning behind connecting the commons on each pole and then connecting the two switches with the "X" (I know there's no connection in the middle of the X, it's the only way I can think to refer to it)? Because two push pulls can give you four positions for two humbuckers, only one pole is needed on each switch for a single pickup guitar. As drawn, remove the two wires making that "X" and remove the jumpers between the commons and it still works. Also, the two single coil tones are switched. As currently drawn the volume "up" and tone "down" is the P90, not the rail. ;)

Beyond all that, edtheward, double check your connections... a few of the terminal/wire solder points look a little dry in the photographs. A single poor connection can kill the entire circuit.
Click to expand...


thank you guys for the help. yes, I haven't done a whole lot of soldering. i will check out the diagram and try again. thanks.
 
Re: ugh. wiring confusion SHPR-1

hermetico said:
Hi Mike,
Thanks as ever.
In first place, I have to say that this is an Artie mod, the Artie's way for the 4-sounds. And I trust on him. I made an indeep analysis when he introduced it and I remember it was ok and understood all the "whys". It works fine.
You can simplify it, for sure, but it is easy to work in that way (less jumpers in the same lug).
Click to expand...

Yes, it works, it's just overkill, IMO. I haven't experienced the noise issues that some of you guys design against in your wiring schemes. Maybe my shielding is working properly, maybe you live too close (ie underneath) a power station. ;) I don't know.

You cannot simply remove the jumpers that you said, in that way you will loose the link between red and blue and probably (I wouldn't like to review it again, since I am in holidays) you can introduce potential noise (some pickup in the hot path, ungrounded...). If you remove those jumpers, you need to rearange the scheme, you need to go to the standard frankfalbo way then (seymour duncan P-Rails diagram).
Click to expand...

You can remove the jumpers between the commons and the two that form the "X". The wire connecting the "bottom" terminals on the two switches must remain.

Again, what you posted works, I'm simply offering a simpler way to do it.
 
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