What is the purpose of the push/pull on the knob on the 1992 CE24?

[Permanent Waves]

Well, since I am in the vein for asking silly questions and the answer to my last one proved that the electronics on my 1992 CE24 were modified, I am trying to figure out if the push-pull knob on the tone knob is original and what it was meant for.

To my ears, it sounds like a coil tap and seems to act on both pickups. I know it is not a Sweet Switch since the circuitry to simulate the longer cable is not present in the cavity. The cavity components seem normal and identical to some pictures I saw in another forum, although someone in that thread thought those were not original.

The guitar is from 92 and there is a white .033uF cylindrical linear capacitor which I saw in other cavity pics from guitars of the same era so I am pretty sure that part is factory original. I was wondering if PRS offered the factory coil tap push/pull on those guitars...

Thanks!

 

[Permanent Waves]

OK, I figured out it's coil tap, but I also figured out why it sounded so weird in the first place. I studied the PRS wiring diagram and found some inconsistencies. One of the pickups had the black and white leads reversed, so it was out of phase. That's why I couldn't figure out what the push-pull did because the guitar sounded very weird with both pickups on, very metallic. I corrected the wiring and it is back to sounding the way it should.

 

[Permanent Waves]

I mapped out the circuit diagram for this and came to an interesting observation - The VB an HFS pickups have opposing polarities. The VB at the neck is hot on the white wire, while the HFS at the bridge is hot on black. I did some further digging on this forum and turns out that it is well-documented that the VB and HFS are made that way - magnets are reversed. I assume that whoever did the wiring mistake on mine was not aware of this. Just thought I'd mention it here in case someone stumbles on this issue later on. Here is an archived diagram:

https://web.archive.org/web/20180218231918/http://www.prsguitars.com/csc/schematics/pickups.pdf

 

[Bill SAS 513]

Nice catch, and thanks for sharing...Enjoy the older CE...They absolutely rock. (well...I'm a lover of all that are FAT necks), but Wide Thins rock, too!!!!