TexasRF@aol.com wrote:
> If you scale this scenario to 2 meters, it is similar to using a 1.8 inch
> o.d. mast to support and rotate a beam antenna. This is done all the time
> with
> no apparent problem.
>
Thanks, Age must be catching up. I never thought of scaling it like that.
If I can put the tribander, or a multibander say 20 through 10 (I don't
think the reflector on 30 meters would clear the guys) it'd free up the
top for a 3 or 4L shorty 40 plus the 7L C3i on six.
73
Roger (K8RI)
>
> 73,
> Gerald K5GW
>
>
>
> In a message dated 3/16/2009 5:16:58 P.M. Central Daylight Time,
> john@kk9a.com writes:
>
> Why would the tower interact more with a tribander any more than a
> monobander? I have used ring rotators on 10m, 15m and 20m with much larger
> tower than you're using with great results.
>
> John KK9A
>
>
>
> To: 'towertalk' <towertalk@contesting.com>
> Subject: [TowerTalk] Ring Rotator and Tribander? Advise sought
> From: "Roger (K8RI)"
> Date: Mon, 16 Mar 2009 16:15:01 -0400
>
>
> I tried this about 15 hours ago, but it's not shown up so I'll try
> again. My apologies if it shows up twice.
>
> I know we've had several discussions on "Ring Rotators", but I haven't
> found anything on using them with tri-banders.
> I'd like to mount my TH-5, or 6 or new large 30-10 multibander just
> above the second set of guys, (~70') but I'm limited to size for guy
> clearance. (I'm using Phillystran) I have my doubts about interaction
> with the 45G which is a pretty good size chunk of steel stuck up through
> the antenna. Has any one on here tried this, or modeled it to see what
> the effects are on the antenna. I'd expect some degradation, but how
> bad could I expect? Is it even worth trying. That'd free up the top of
> the tower for something on 40 along with the 7L C3i 50 Hz Yagi.
>
> 73
>
> Roger (K8RI)
>
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