[TowerTalk] Voltage Breakdown For Enameled Wire

[Grant Saviers]

Here are specs from Temco
https://temcocontent.com/attachments/soderon155_data_sheet.pdf
and small qtys on amazon
https://www.ebay.com/itm/TEMCo-12-AWG-Gauge-Enameled-Copper-Magnet-Wire-1lb-155C-50ft-Coil-Winding/251068857199?epid=1040064336&hash=item3a74debb6f:g:hF4AAOSw0fhXlpAJ:sc:USPSPriorityMailSmallFlatRateBox!98052!US!-1

I've done business with them on several fronts - magnet wire for 
filters, 6061 aluminum plate, and a 3 phase 40hp rotary converter. They 
are in Fremont,  nearby you.

It's an eclectic collection of stuff that they have provided me but all 
were ok+.

I just got some bare aolid Cu 14 and 16ga from Remington Industries, 
also on Amazon.  They list insulated as well with the same insulation 
structure as Temco.

Grant KZ1W


On 1/28/2018 18:02 PM, Jim Brown 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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