[Elecraft] Has anyone epoxied their toroids after they were wound?
Hi Brian, Never have epoxied toroids, I can see one major disadvantage using this method... You'd never be able to rewind the same core. Epoxy is a real bear to remove. I've used hot glue to keep toroids in place, a little easier to remove if needed. Think you're better off with nail polish or acrylic.. Cheers, Julius n2wn ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Has anyone epoxied their toroids after they were wound?
J F wrote: Never have epoxied toroids, I can see one major disadvantage using this method... You'd never be able to rewind the same core. Epoxy is a real bear to remove. I've used hot glue to keep toroids in place, a little easier to remove if needed. Think you're better off with nail polish or acrylic.. This issue has come up before, and Elecraft has recommended that NOTHING should be used to hold the turns of toroids together, or glue the toroid to the board, etc. Nothing is needed and some of the materials used can have deleterious effects. Incidentally, the toroid cores are non-conductive and you needn't worry about insulation being scraped from the wires on the edges of the toroids causing shorts. In fact, even if you strip the lead too much and the stripped portion touches the core there will not be a problem, as long as stripped turns do not contact one another. So...relax, wind the toroids according to the instructions and don't worry! -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Has anyone epoxied their toroids after they were wound?
Applying any material (Q-dope, epoxy, hot glue) to the wound toroid is not a good idea. It increases the interwinding capacitance and can effect the performance of the various toroidal transformers. This is especially true in the transmitter section where the toroids are tuned with a fixed capacitor to increase the power transfer. The value of these capacitors was determined without any coating material on the toroid, and changing the dielectric around the toroid windings may require a change in the capacitor's value. -John KI6WX Never have epoxied toroids, I can see one major disadvantage using this method... You'd never be able to rewind the same core. Epoxy is a real bear to remove. I've used hot glue to keep toroids in place, a little easier to remove if needed. Think you're better off with nail polish or acrylic.. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
