Pickup DCR's over the years?

[Artie]

You can post it here if you want.

The thing is, the forum let me do a file larger than 100k. But that's ok. My Google drive links should work fine.

 

[freefrog]

Alex1fly's thread on making a hybrid got me thinking about this. He was going to do a 59/Jazz neck hybrid, and I wondered how different the two coils actually were. They're both A5 mags. So I looked at my old Duncan chart. The old DCR's are quite different from the new. The JAZZn and 59n are actually flipped, in terms of which is hotter. This seems more than just measuring variances. I only noted the Jazz and 59 values, (in green). I wonder how many others differ.

BTW and to share my indifferent thoughts about the ORIGINAL question...

Resistance AND inductance of SH1 / SH2 seem to have changed noticeably with time. My archives mention a SH1 @ 7.5k and 4.27H vs another one @ 7.15k and 3.68H only. To compare to a SH2 @ 7.24k and 4.28H, vs another one @ 7.28k and 3.75H (note the lower inductance for this second example although its resistance is higher, which illustrates my stance about DCR as not really meaningful). Non limitative list.

What hasn't changed is the difference of wire : PE vs "poly" insulated 42AWG.

The resonant frequencies in the old tone chart gives an idea of what this difference implies: if a 7.43k SH1N was meant to resonate @ 6.8khz while a 7.72k SH2N would peak @ 8khz, then the coils of the SH1 were more capacitive than those of the SH2... with therefore a slightly warmer response and slower transients. Again, non limitative list (variations of insulation can also affect the inductivity and Q factor of a coil).

Rather typical if you ask me. That's more or less the difference between a P.A.F. and a T-Top...

Pairing two coils with same or close DCR + inductance but whose wire have different insulations should give two capacitively mismatched bobbins, whose resonance should therefore exhibit secondary peaks (comb filtered harmonics) beyond the main resonant frequency... as if the pickup was a double tuned circuit.
We are not so far from the "Dual-Resonance" DiMarzio recipe, there.
Now, any humbucker shows a certain amount of dual resonance because of the wires betweeen its coils and this effect becomes more noticeable as soon as a 4-conductors cable is used so I'm not talking about something so "special". Just sharing about the fact that even with balanced coils, a PE/poly insulated humbucker should have slightly more complex harmonics than if both coils had the same insulation.

FWIW. Hope this contribution helps to some extent... FYI, I won't be able to post again the next days since I'll be elsewhere, without Internet.

 

[Artie]

Yes. Good info. As always.