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
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|