Post by antigua on Sept 25, 2016 18:53:09 GMT -5
I'm very satisfied with this set. As you can see, I had to open up my Paisley Strat to analyze them.
My experience and the measured results say these sit right between CS 69's and Fat 50's. Perfectly Stratty, Nile Rogers tones are to be had with this set.
This is a homogeneous set of three pickups, no reverse wired/reverse polarity middle, true to vintage spec.
Fender 57/62 Bridge
DC Resistance: 5.94K
Inductance: 2.223 H
Resonant Peak: 9.70 kHz
Calculated C: 101pF (121-20)
Coil width: 0.526"
Fender 57/62 Middle
DC Resistance: 5.96K
Inductance: 2.230 H
Resonant Peak: 10.4 kHz
Calculated C: 85pF (105-20)
Coil width: 0.571"
Fender 57/62 Neck
DC Resistance: 5.96K
Inductance: 2.226 H
Resonant Peak: 9.92 kHz
Calculated C: 96pF (116-20)
Coil width: 0.542"
The pole pieces are semi uniformly beveled AlNiCo 5, with gauss readings around 1100.
This bode plot is a little uglier than usual because there was apparently some EMI noise present, but the data is fine otherwise.
The interesting thing about this set is how amazingly close the DC resistance is, as are the inductance measures, but the coil thickness and calculated capacitances are farther off, and it seems to inversely correlate with the thickness of the coil:
0.526" -> 101pF
0.542" -> 96pF
0.571" -> 85pF
and this makes; more space overall means less wire proximity, less capacitance. I have not seen such a good example of this particular effect in a set of pickups to date.
It's worth noting, though, that the guitar cable capacitance is a lot higher than the pickup's capacitance, so while those "unloaded" peaks show some differences, the "loaded" peaks are all more or less identical, so for all intents and purposes, these pickups are identical.
Setup details:
Bode plots are made with a Velleman PCSGU250 and the supplied probes in 10x mode, with the function generator feeding a driver coil of 0.48mH, placed on top of the pickup and driven with 2Vpp. The pickup is connected to an integrator circuit, designed by Ken Willmottkenwillmott.com/blog/, with a Velleman 10x probe, and fed back into the Velleman PCSGU250. I measured the probes' capacitance at 20pF, so that amount is subtracted from the capacitance calculation.
The inductance and Q measurements are made with an Extech 380193 in "SER" series mode, and the mean value between the 1kHz and 120Hz modes is recorded. The capacitance value is derived from the inductance and measured resonant peak.
Magnets are tested with a Spin Doctor ER gravitastech.weebly.com/spin-doctor-er.html