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Model 89 coil rewind..did anyone save their notes?
#6

Nice looking rewind job. BTW, the lead attached to the primary might be what they used to call a "gimmick." It's a piece of insulated wire, usually not connected to anything at one end but sometimes routed near another conductor, just to add a tiny amount of capacitance to a circuit.

They're often found on coils & transformers of various types as a short piece of magnet wire routed across the coil at 90 degrees to the rest of the windings, connected at one end only.

Gimmicks are sometimes seen on tuning capacitors as a piece of regular insulated hook-up wire, sometimes running from the oscillator section to the antenna section, but only connected at one end or the other.

Occasionally, you see a few turns of wire wrapped around a cylindrical paper capacitor.

A gimmick is sometimes represented in the schematic as a stray line with a curlicue in it, connected at one end of a coil, which tells you only that it is there, not how it is supposed to be run. Sometimes gimmicks are not seen in the schematic at all, but they need to be there all the same.

John Honeycutt


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RE: Model 89 coil rewind..did anyone save their notes? - by Raleigh - 02-11-2014, 12:09 PM



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