PAF Pickup Secrets: Resistance, Why does it vary?

In this video Jon Gundry of ThroBak Electronics explains why vintage PAF pickups vary in their resistance reading. The video includes the unboxing of a vintage 1959 ohmmeter. https://www.throbak.com/paf-pickups.html

Vintage PAF pickups vary in resistance readings due to several factors.

The first of these details is the meter used for measuring resistance used by Gibson in the 1950's. The use of the Allen Electric Equipment ohmmeter meant that assembled pickup resistance readings were limited in accuracy by a .5k resolution ohmmeter scale.

Magnet wire in the 1950's was also subject to 14% variation in outside diameter and ohms per foot within the 42AWG tolerance. Modern min./nom. wire reduces this potential variation to 7%. This makes vintage PAF pickups prone to a wider variation in resistance.

Pickups wound at the Gibson Kalamazoo factory in the 1950's were also wound in a building with temperature variations that affected the consistency and accuracy of ohmmeter measurements of pickup coils. This led to inconsistency in assembled pickups resistance readings since coil readings go up and down with temperature variations.

Because of the use of pickup winding machines both with and without autostop counters, vintage PAF pickups vary in turn count for each coil. This contributes to variation in resistance readings as well.

Finally, variation in turns per layer between pickup winding machines at Gibson in the 1950's further increases the possible variation of pickup coils resistance readings.

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Видео PAF Pickup Secrets: Resistance, Why does it vary? канала ThroBak Guitar Lounge