Thread: Parallel coax
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Old September 26th 15, 08:24 PM posted to rec.radio.amateur.antenna
Wayne Wayne is offline
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First recorded activity by RadioBanter: Jul 2006
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Default Parallel coax



"John S" wrote in message ...

On 9/25/2015 4:31 PM, Wayne wrote:
I use a short vertical antenna that has a low feedpoint impedance.

Would there be any advantage to running two parallel 50 ohm coax to
reduce losses to the shack tuner?


If your antenna is 25+j0, paralleling two 50 ohm coax lines would reduce
the SWR from 2:1 to 1:1.


Is that what you want to know?


Yes, more or less. But, I wouldn't even bother trying to reduce a 2:1
unless the rig wouldn't tolerate it.

The antenna feedpoint impedance is around 20-j130 at 14 MHz, approximately a
21:1 SWR.

Some years back there was a discussion on paralleled coax, and I seem to
recall that it wasn't considered to accomplish much even under ideal
conditions.