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Re: [TowerTalk] CMC-230-5K

To: towertalk@contesting.com
Subject: Re: [TowerTalk] CMC-230-5K
From: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
Date: Thu, 21 Apr 2016 16:13:12 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
I install chokes only when and where I find a need for them. I have no chokes in any rotator leads or remote antenna switch. I do have a choke on the leads into the control head in the shop for the 6-pack.

73

Roger (K8RI)

On 4/21/2016 Thursday 3:47 PM, Jim Brown wrote:
Good advice on all counts.

Mobile installations are particularly problematic, because the body/chassis is used as a counterpoise for our antennas, bonding of body and chassis is often flaky (or non-existent, thanks to paint) and the routing and design of interconnecting cables for vehicle systems pay little of any attention to EMC.

73, Jim K9YC

On Thu,4/21/2016 12:39 PM, jimlux wrote:
I choke everything. If it's a wire, and it's near the antenna, it's a potential radiator.

In fact, on my mobile installation, I had worse RFI/EMC problems with the 12V control wires to the tuner and the remote head cable for the radio than with the coax.

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73

Roger (K8RI)


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