Thread: Parallel coax
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Old October 5th 15, 04:41 PM posted to rec.radio.amateur.antenna
kg7fu kg7fu is offline
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First recorded activity by RadioBanter: Feb 2015
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Default Parallel coax



On 09/27/2015 11:22 AM, John S wrote:
On 9/27/2015 9:41 AM, kg7fu wrote:
Doubling the number of feedlines would double the losses. Not only that
but each connector in the system inserts losses so that number
would be 4x.


How can that be? Each line carries half the power.

Connector loss at 14MHz is insignificant.


Connector losses are static up to UHF at around .5db per connector for a
typical PL-259/SO-239 pair. Insertion losses for professional grade
connectors on high quality rigid and semi-rigid coax such as Andrew
Heliax are around .05db.


Matching the antenna won't make the Return Loss go away but it will make
the transmitter happy.



I should have said matching the line.

Maybe you are working from the assumption that a mismatch between the
source and line causes return loss. It does not. Only the mismatch
between the load and line causes return loss.


KG7FU