Fender N3 Noiseless in an American Deluxe Strat

[aquin43]

Hello all,

I have just started dabbling with pickup measurements so here are some measurements on Fender N3 Noiseless pickups in a 2014 American Deluxe Stratocaster. They are made using the supplied Fender cable into a 1M load. The overall capacitance is 360pF.

All of the pickups show an interesting kink in the response just above resonance, presumably caused by the coupling of the two coils.

Also included is a wide band plot of the fingerboard pickup.

Turning the volume down to 8 removes the slight peak in the fingerboard pickup.Many jazz guitars don't have a tone control and rely on this effect.

The driver coil is 20T of 0.2mm wire driven via 50 Ohms from a 50 Ohm source. It is phase compensated up to 20kHz. The loading, for this test, is the cable plus 1M into a high input impedance buffer using an OPA1642 wired for unity gain. The test set is an old Audio Precision System One. Equalization is computed.

The test coil in place

Bridge pickup at full volume.

Middle pickup at full volume.

Fingerboard Pickup at full volume.

Fingerboard pickup with volume at 8.

Fingerboard pickup at full volume -- wide band.

Arthur

[stratotarts]

IIRC noiseless pickups sometimes have a double resonant peak. It's not as pronounced here but you can see a hint of it:

[antigua]

I forget the reason where two coils have two peaks, but even single coils that are not uniformly wound will show additional peaks, where the sloppier the windings are laid ,the more peaks there tends to be. I believe the reason is because there are several discrete values of lumped capacitance, the capacitance of the whole as well as the capacitance of the halves, leading to several different resonances as the frequency increases, but I'm not sure, I need clarification on the technical aspect of it.