[TenTec] OT 75 Ohm twin feeder
Steve Hunt
steve at karinya.net
Wed Jun 11 12:59:16 EDT 2008
Jim,
I'm trying to avoid coax in this application, because folk seem to have
difficulty making off the tails; hence my interest in twin feeder. If
folk can cope with coax there's no problem using RG213 or even RG58 at
lower power levels.
73,
Steve G3TXQ
Jim Brown K9YC wrote:
> On Wed, 11 Jun 2008 09:35:20 +0100, Steve Hunt wrote:
>
>
>> Grateful for any views.
>>
>
> I strongly recommend a decent 75 ohm transmitting coax (robust
> copper braid shield, UV-rated jacket) with a good multi-turn common
> mode choke wound around toroids. The obvious advantage is greatly
> reduced receive noise thanks to the choke, and it's widely
> available.
>
> I was lucky enough to find 250 ft of Belden 75 ohm KW twinlead New
> Old Stock at a hamfest about 25 years ago. I used it on a dipole
> that I also used as a top-loaded vertical for 80 and 160. Nice
> stuff, but LONG discontinued.
>
> 73,
>
> Jim Brown K9YC
>
>
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