[PVRCNC] Coax window feedthrough

[Mike Barts]

Will,
it really depends on how much mismatch you will have and the construction
of the feedthrough. If your OCFD is fairly well matched, then the voltage
will be between 70.7 V (1:1) and 141.4 V (infinity:1). Doesn't take much in
terms of materials to hold off 150V. The CATV ones are obviously built for
RX only, but at 100W might be fine.

I'd buy two of the CATV one and see if they burn up. If they do, invest in
the $60 one (MFJ?).

73, Mike N4GU


On Mon, Jun 3, 2019 at 10:24 AM Will via PVRCNC <pvrcnc at mailman.qth.net>
wrote:

> Is anyone familiar with commercial coax window feedthroughs? I need to run
> a 50 ohm coax through a window. The 50 ohm feedthroughs are about $60. You
> can buy the 75 ohm CATV type for about $2. I'm thinking there really isn't
> much difference...Both look to be two parallel copper or aluminum strips,
> about 3-6" long.
> I'm going to use it for an 80 meter OCF dipole / 100 watts.
> Any thoughts?
> 73,
> Will AA4NC
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