[TowerTalk] Voltage Breakdown For Enameled Wire

[Edward Mccann]

Understand your preference for enameled wire.

On the other hand have used the Salas-recommended wire (see link below) with no problems at HV.

http://www.ad5x.com/images/Articles/Current%20Balun%20RevA.pdf

And let us know wazzup with your new project NOT using RG-142 and the stainless steel conductor.

73,
Ed McCann
AG6CX
Sausalito 

Sent from my iPhone

> On Jan 28, 2018, at 6:02 PM, Jim Brown <jim at audiosystemsgroup.com> wrote:
> 
> I'm once again considering winding high power chokes with enameled wire. Zo of a closely #12 pair is about 53 ohms, which makes it desirable IF breakdown voltage is sufficient. I would appreciate for sources of #10 or #12 enameled wire with published breakdown specs.
> 
> I've found that THHN (about 93 ohms Zo) works fine for simple antennas like dipoles, but some multiband antennas with complex matching/coupling systems don't like that much mismatch. We had this problem with the Force 12 C3SS, the choke is enameled #12 of unknown pedigree. No breakdown issues with a 600W power amp and the antenna is a good match to it, but the engineer in me wants to be conservative for legal limit to an 80/75 dipole that I use from 3.5-3.9 MHz.
> 
> Yes, I know I could put the conductors in Teflon tubing, but that increases Zo. I've measured #12 pairs with various Teflon insulation and get values around 101 ohms at HF.
> 
> Suggestions?
> 
> 73, Jim K9YC
> 
> 
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