[Hallicrafters] Antenna info ?

[Rick Smedberg]

Dear Phil
I also have a 6btv and my antenna has done the same thing. Except on
rainy days then it loads good. I suspect that the joints have become
corroded. I intend to take it apart this summer and polish all the
connections between the sections. Use very fine sand paper or steel
wool. I should replace the coax because it may have water in by now.
Let us know what "you" find is your problem. There are a lot of those
antennas in use. You can fudge the tuning by moving the traps a little
bit because the company told me so.
73 rick
wa8ylz


Phil Atchley wrote:
> 
> Hello
> This is indirectly related to Hallicrafters as this antenna IS used for
> receiving on the 5R10A and (future) SX-71.  I don't belong to the antenna
> reflector and I figure there are some good gurus on this list.
> 
> I have a Hustler 6BTV vertical that was put up a little over 2 years ago and
> performed flawlessly for a couple years.  (it is over  > 1000 Sq/ft of
> sheetmetal roof/awning.)  The unit was guyed (per Hustlers instructions) at
> the 20M trap, especially as we get some good winds here.  I used some Nylon
> Twine as the guys, it is still holding well so it didn't "sun rot".
> 
> It has since developed problems, high SWR's Especially on bands below 20M
> and I suspect that the outer sleeve on the 20M trap 'may' have slipped down
> some from the constant downward  pressure of the guys, detuning the trap.
> (the various tubing sections were all secured against slipping by setscrews
> after it was tuned).  Does this sound feasable?  While up there I intend to
> replace all the coax from antenna to the antenna switch in the shack as
> insurance.  (I use RG8X as I don't run any 'power' over about 100W maximum).
> I want to do EVERYTHING in one trip to the roof as I don't want to walk on
> the mobile roof more than needed.  My wife says she can tell exactly where I
> am by looking at the ceiling  sag 8^(
> 
> My present (best) SWR's are
> 
> 29.7   2.0 (10M is about as it was, I didn't wish to cut tubing)
> 28.0   1.3
> 21.3   2.0 (never had a really good SWR but was much better)
> 14.35 1.8
> 14.1   1.4   (Was tuned to Phone band)
> 10.15 2.0   (Was 1.5 at 10.1MHz)
> 10.0   1.2
> 7.1     2.0   (was tuned to 7050)
> 6.97   1.3
> 3.67   2.4   (was 1.4 at 3.908 net freq)
> 
> If the trap is detuned, any hints on getting that sleeve in the right spot
> again?  I don't have a grid dip meter.  Also, I never had to tune a trap
> before, how critical are these Hustler traps.  Any ideas?
> 
> 73 de Phil  KO6BB
> Loving home provided for wayward Boatanchor Receivers
> ko6bb at elite.net
> Merced, Central California
> 37.18N 120.29W CM97sh

-- 
Rick Smedberg WA8YLZ
P.O. Box 148 Custer, MI 49405
smedberg at t-one.net
http://www.t-one.net/~smedberg
Grid Square EN63vw