Nordstrand NP5 Wiring Problem

[adamg67]

I just want to check that I’m looking at this right...

I’ve just dropped a Nordstrand NP5 split coil P pup into my Maruszczyk Jake, replacing a Delano PMVC 5 FE/M2. There’s a Delano MC 5 FE/M2 at the bridge, which is a quad coil.

With the NP5 fitted, I was getting low output from the middle position on the blend, so with both pups in parallel. No problem, just out of phase... except when I tested it properly, I get low output from the top half wired one way, and low output from the bottom half the other way round. The NP5 has the two halves wired together already, so there’s nothing else to change.

So... knowing that the other pup is a quad coil, it looks like that is wired differently to the NP5 as far as the phases of the two halves in relation to each other. If I want to keep those two pups I’ll need to reverse the polarity of one half of the NP5 in relation to the other, so basically just swap the wires to one of the halves.

Does that sound right? Thought it was worth checking before I start snipping wires.

 

[adamg67]

But, just realised, if I do that I will lose the hum cancelling? 

[adamg67]

Progress. Thanks to this page on the Nordstrand site: https://nordstrandaudio.com/blogs/news/phase-let-s-work-together with a handy tip for checking polarity, it was easy to confirm that the Delano pup has different phase for each half of the split, which is not what I would expect (but Im' no expert). The Nordstrand has the same phase for each half (it presumably has each half magnetised a different way, and the coils in opposite directions). 

Neither pickup can be modified to fix this without losing hum cancelling.

Edited March 20, 2021 by adamg67

[adamg67]

[ removed by edit once I worked out what was going on properly ]

Edited March 20, 2021 by adamg67