I measured the probes' capacitance at 20pF, so that amount is subtracted from the capacitance calculation. The pickup is connected to an integrator circuit, designed by Ken Willmott, with a Velleman 10x probe, and fed back into the Velleman PCSGU250. With dummy load of 200k and 470pF across the pickup:īode 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 resonant frequency will move depending on the length of the guitar cable, but the higher inductance of the SSL-1 means they should be a bit louder in any event. Both the CS 69 and SSL-1 have Q factors or 1.82 with the dummy load. Interestingly, the resonant peak comes closer to the SSL-1, because even though the inductance is lower, the capacitance is a lot higher. The GFS Boston Blues should be all around brighter, lower output pickups, all other things being equal, due to the combination of a lower L and C. the no-load resonant peak is about 2kHz lower, the loaded peaks are a lot lower also. capacitance is 30 to 40 pF higher, and consequently This is the second "low output" set I've tested in addition to the GFS Boston Blues. The pole pieces are mostly fully charged AlNiCo 5, around 1100 - 1200 gauss, though I see a few that read 900 gauss, or 15% under, not too significant. Unlike most other single coils, these have red "enamel-coated" magnet wire. Sound wise, they make you think "Hendrix", but then again they're named for the same year as Woodstock, so maybe we're been primed to make that association.
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