Tube Amps / Music Electronics
|For current discussions, please visit Music Electronics Forum.||New: view Recent Searches.
New: visit Schematic Hell!
The sunn still shines online!
|Listen to great tunes streaming live right now!|
|previous: Steve A. Rusty:||View Thread|
|1/5/1999 7:31 AM|
|Mark Hammer||Re: 57 fender pickup|
All good ideas, Steve. Some folks suggest that it's easier to locate loose ends of torn windings by using a small, short bristle paint brush (the small kind for detailing in pictures, not painting your house) and a magnifying glass. Brush gently in one direction on each side of the coil, and look for loose ends, then brush in the other direction the same way. Part of the success of this method, of course, depends on whether there is any additional material (to pot the pickups) adhering the windings to each other.
Another consideration is what to do when you locate a loose end. I don't know what your experience is, but getting enough insulation off to be able to tin the end is problematic. I buy my wire from a surplus place in Toronto, so I don't really select it for the insulation type (because I generally don't have any info as to what it is). After years of frustrating myself trying to scrape off the insulation with a utility knife (some of you must be familiar with the experience of almost getting it scraped off only to chop off the last bit of wire available), I found that I had more success by doing one of the two following things:
1) Take a small piece of fine-grit emery cloth or wet/dry sandpaper (the black stuff with green backing). Fold it over taco-style, gently press it around the end of the wire with thumb and index finger, and pull...lightly.
2) Get a very fine grinding stone/wheel (e.g., such as one would use on a dremel tool. Place the loose end of wire on a surface that will grip it and give a little (e.g., a piece of foam rubber), and rub the wire with the grinding surface, moving from the fixed end to the free end.
Not perfect, but less frustrating.
Incidentally, unless you have some chemical method that removes all the insulation it is applied to, you'll find that you probably need to tin the loose ends before being able to measure the DC resistance. The reason is that mechanical methods don't remove all the insulation, and you'll need to be able to visually identify a place of viable electrical contact to be able to tell the difference between an end that isn't connected to anything, and an end that your meter probes aren't connecting with.
|Steve A. Mark:|