RCA 21CT55 #8802897 is Dead

[jeyurkon]

These guys carry bond wire. http://www.wiretron.com/magnet.html

Litz wire probably isn't appropriate, but it comes covered.

Dissolving rosin in alcohol and brushing it on as you wind is supposed to work also.

John

[wa2ise]

Does that coil winder machine do that zig-zag diamond shaped pattern with the wire when winding the coil? /\/\/\/\/\/\/\ Supposedly that pattern makes for lower stray capacitance. And is nearly impossible to do by hand.

[John Folsom]

Yep, the universal coil winding machine does the ziz-zag pattern ,and it IS impossible to do by hand. Here is a photo of the gears , cams, and other items used to set up the machine for a particular winding pattern. The gears range from 19 to 120 teeth, and the heart-shaped cams range from .082" to 1.5" (coil width) . The gears and cams used for a setup is dictated by the coil form diameter, the winding width, and the wire gauge.

[DaveWM]

John, how do you know how many turns between tap, and gauges of wire to use? do you need to take one apart or are there specs to be found.

btw, you going to fawg this weekend?