How to test pickups

capnjuan

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Hi Darryl; when testing pickups, put one probe in the ignition slot, the other on the radio switch ...

The characteristics of interest in a pickup are continuity; that is, is there an 'open' - a physical break in the windings, and resistance; how much resistance does the pickup offer.

The test for continuity and resistance are effectivey the same. The area of your meter to use for resistance testing starts (clockface) at 5:30 and ends at 8:45 - outlined in green - the lower left quadrant of the dial.

Your probes should be marked red and black. The black probe is connected at the (top to bottom) lowest of the three jacks and the red in the middle jack.

The marks in the resistance testing zone are ranges; pickups typically have resistance ranging from 3.5K to 9K ohms where K stands for thousands and an Ohm is a unit of resistance (symbolized by the Greek letter Omega) with the derivation of its electrical properties dating to the Bhagavad Gita but then my Sanskrit isn't what it used to be.

Turn the dial so that it reads about 7:30 on the clock; turning the dial turns the meter on; when on, touch one probe to one lead of the pickup, the other to the other lead - doesn't matter which probe goes on which lead. I can't quite read the ranges; if you don't get a reading as indicated, try turning the knob one range ahead or one range lower.

If you have secure contact and the reading fluctuates erractically, there is an 'open' in the pickup and the meter is indicating an infinite amount of resistance - the same reading you get if the probes aren't touching anything with the meter on.

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Darryl Hattenhauer

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Thanks, John. I know Gita, but I didn't know she is from Bhagavad.

If the fluctuation is small, like between 6.0 and 6.9, is the pickup good?

I have three Guild Franz P-90s and one Guild white dynasonic that apparently need fixing. They register either an unchanging 1, or a rapidly changing about 1 to 100. Either way, all need fixing, right?

Do you have anybody you'd recommend? I don't want to get them "fixed" the way Jesse Jackson would do it.

dh
 

capnjuan

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If the fluctuation is small, like between 6.0 and 6.9, is the pickup good?
Yes; fluctuation probably just not such good contact between the p/u lead and the probe.

I have three Guild Franz P-90s and one Guild white dynasonic that apparently need fixing. They register either an unchanging 1, or a rapidly changing about 1 to 100. Either way, all need fixing, right?
On the 'unchanging 1' - I'd stay with that one; try switching the probes and also the 'range' function. The others I believe are shot.

Do you have anybody you'd recommend?
Do not; I tried to find a thread/post from JP from several months ago with gut-shots of p/u's from a well-regarded winder's shop ... couldn't find it.

I don't want to get them "fixed" the way Jesse Jackson would do it.
I think his approach results in high frequencies only ...

J
 
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