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reverse engineering

5/19/2006 6:28 PM
Gtarman reverse engineering
Hi, Just a quick question to whomever will answer it. When reverse engineering a pickup I have all of it figured out for the most part, the one thing that stumps me is how to get an indication of how much tension was used, without a lot of high priced equipment. This is pretty easy if it is unpotted but when it is fully potted I cant tell.
5/19/2006 8:59 PM
Dave Stephens
GeetarMon: I don't know of any sane way to back engineer coil tension on a fully potted pickup. Just some ideas, you could hang it in a toaster over with a drip pan below it and heat it to under flame point, maybe 180 degrees, let it drip out, wipe it off and repeat until the wax is vaporized or mostly drips out. Probably while its still warm you could press on the coil with your thumb and see if the coil is mushy or firm as a rock. that might work, just don't start a fire. when I use a toaster oven for weird stuff like that I use one of those small thermometers, dial type, that u stick into meat, because the temperature settings on the ovens are inaccurate. Just sit it on the shelf in there and watch it through the glass.....
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5/19/2006 9:37 PM

Or, you could heat up the pickup as above, then put the pickup in hot water so the wax floats out, and then try the 'squeeze test'.  
5/19/2006 9:52 PM
Dave Stephens
unless its a single coil, would wreck the forbon, bucker bobbin would probably warp if its old.....
5/19/2006 9:58 PM
Dave Stephens
what kind of pickup is this you're back engineering? wax usually melts about 150 degrees F just barely, plastic bobbins shouldn't be heated much over that, some old waxes have alot higher meltting point, need more info....
5/20/2006 7:47 AM
Hi Dave, I'm working on rewinding the bridge on my 69 set of strat pickups, dead. I'm not getting the thumping punchy bottom end that it is known for. It sounds good but not as full as I would like it, any suggestions.
5/21/2006 12:09 PM
GTarman Nevermind I figured it out
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