[TowerTalk] TH6DXX Adjustments

[Rod Greene]

I am also interested in any advice for the dimensions, etc. for the TH6DXX
as I have a used one that I will be rebuilding this Spring. I will probably
want to set it for CW on all the bands. I plan to side mount it on Rohn 45
at approx 70'. 
tia, Rod W7ZRC

At 08:55 AM 12/29/1998 -0500, Mike Sims wrote:
>
>Hello,
>
>Need information on what others have found in adjusting a TH6DXX for best
>SWR in a particular part of a band?
>
>The TH6DXX used here is set for the CW.  On 20, the SWR is as it should be.
>However, on 15 and 10 meters the lowest SWR is in the phone band - on 15 it
>is around 21,275 kHz and on 10 meters it is around 28,300 kHz.  The TH6 is
>mounted on a 125 ft tower with the guys either Phyllistran(?) or broken by
>insulators every 51 feet. 
>
>It was rebuilt, including the traps, using many of the techniques discussed
>on the reflector - Noalox on the aluminum joints, all stainless steel
>hardware, lockwashers used under all the bolts or nuts, etc.
>
>My present thinking is to just adjust the driven element (I can get to it on
>the tower) by increasing the distance from the boom to the first trap.  Then
>to shorten the element's tip (outer end) to trap distance by an amount equal
>to the "increase".  The reasoning is by increasing the boom to first trap
>distance should lower the SWR on all the bands and the reduction of the tip
>to trap distance would bring 20 meters' back to its present SWR minimum spot.
>
>Any and all thoughts are welcome.
>
>        73,
>        Mike, K4GMH
>
>If the reasoning  
>
>
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>
Rod Greene, W7ZRC	><>
11322 Hollandale Dr.
Boise ID  83709-2340
(208)376-8136
w7zrc@micron.net


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