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Re: [TowerTalk] Common mode choke.

To: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>
Subject: Re: [TowerTalk] Common mode choke.
From: Mike Reublin NF4L <nf4l@comcast.net>
Date: Thu, 9 Oct 2014 15:59:24 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Thanks Roger.

Yeah 75 & 160 slopers, common feed. The tower is a 72' crank-up. We'll see how 
it plays.

73, Mike

On Oct 9, 2014, at 3:44 PM, Roger (K8RI) on TT <K8RI-on-TowerTalk@tm.net> wrote:

> On 10/9/2014 3:37 PM, Roger (K8RI) on TT wrote:
> 
> Don't know if this went or not.
> 
> 73
> 
> Roger (K8RI)
> 
>> On 10/9/2014 3:01 PM, Mike Reublin NF4L wrote:
>> 
>> It works OK for me on a center fed half wave.  A single  choke at the feed 
>> point wasn't sufficient, so I added a second where the feedline reaches the 
>> tower.  The choke is right against the tower .  With the single choke and 
>> the highly imbalanced 75 meter fan dipole when the power reached about a KW 
>> IIRC all the controled LEDs would light. At the legal limit, they were 
>> bright. When I added the second choke, located st the 20' level on the 
>> tower, the RF in the shack disappeared even with the amp at the full legal 
>> limit with a steady carrier.
>> 
>> Yes, I'm sure the tower affects it, but it works.  You didn't say what bands 
>> your half slopers are on, but I assume 75 and maybe 160.  To get a 45 to 60 
>> degree angle on 160  takes a tower of 100' or more
>>> I wrapped the coax for my 1/4 wave slopers thru 6 toroids. The bundle hangs 
>>> so it touches the tower. Zat OK?
>>> 
>>> 73, Mike NF4L
>>> _______________________________________________
>>> 
>>> 
>>> 
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>> 
>> 
>> -- 
>> 
>> 73
>> 
>> Roger (K8RI)
> 
> 
> -- 
> 
> 73
> 
> Roger (K8RI)
> 
> 
> _______________________________________________
> 
> 
> 
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