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[TowerTalk] 12V through coax to switch antennas remotely

To: <towertalk@contesting.com>
Subject: [TowerTalk] 12V through coax to switch antennas remotely
From: "N2TK, Tony" <tony.kaz@verizon.net>
Date: Tue, 3 Apr 2018 09:32:24 -0400
List-post: <mailto:towertalk@contesting.com>
Have a question about the values of the choke to keep RF from the relay and
the caps for coupling of the signal. In different products I see quite a bit
of different values of both components.

For the coupling caps I see values from .01-.2uf. It would seem increasing
the value of the cap reduces the Xc. And for the choke I see values of
100uh-2.5mh. And it seems increasing the value of the choke also increases
Xl.

 

My application is for 160M and 80M only with receive antennas.

 

My question - does it really make a difference over the values listed above?
Do all the values offer enough Xc or Xl to not cause any problems?  Is there
really a recommended "good" value for the caps and coils? Even 100uh offers
1K ohms at 1.8MHZ and .1uf is .8 ohms.

 

Still learning.

Tnx

N2TK, Tony

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