Fw: [TowerTalk] TH6 SWR on 10m-no balun

[Mike & Coreen Smith]

> Gary, et al
>
> Funny you should mention that. I blew up the BN-86 balun 10 years ago and
> never replaced it.
> AFAIK, the coax is attached pretty much directly to the the driven
element.
> (DOH!!)
> I haven't looked at it as I generally don't climb higher than 20'
>
> It's always pretty good (and not so low in frequency) until a year ago.
>
> NO WONDER  I HAVE THIS PROBLEM ;-)!! No balun!!!  Double DOH!
>
> Guess I should install "something" up there. Some locals are running
theirs
> w/o baluns too.
> Evidentally their element lengths and/or corrosion problems are not as
> severe as mine.
>
> AFA building a balun, what do you guys recommend?
> Buying one is out of the question. I am on a ZERO budget these days.
>
> Mike VE9AA.....
>
> Michael, Coreen & Corey Smith
> (VE9AA,  VE9AAA & Baby-VE9)
> 271 Smith Rd
> Waterville, NB
> E2V 3V6
> Canada
> http://members.tripod.com/~ve9aa/index.html
> http://www.geocities.com/RainForest/Vines/2174/
>
> ----- Original Message -----
> From: Gary D Elliott <k7ox@pipeline.com>
> To: Mike & Coreen Smith <ve9aa@nbnet.nb.ca>
> Sent: Saturday, September 15, 2001 6:57 PM
> Subject: Re: [TowerTalk] TH6 SWR on 10m
>
>
> > Hi Michael
> >
> > I had the exact problem you are describing with my TH6.  The problem
> turned
> > out to be the balun I was using which was a Palmor good quality balun
but
> > the lead lengths affected 10 meters.  I changed out the balun at the
feed
> > point with 12 turns of RG213 on 6 inch dia and all my problems went away
> and
> > the beam is playing very well on CW and low Phone.  What are you using
for
> a
> > balun ????
> >
> > Gary
> >
> >
> > ----- Original Message -----
> > From: "Mike & Coreen Smith" <ve9aa@nbnet.nb.ca>
> > To: <towertalk@contesting.com>
> > Sent: Saturday, September 15, 2001 10:26 AM
> > Subject: [TowerTalk] TH6 SWR on 10m
> >
> >
> > >
> > > Has anyone ever had the "resonant" dip on their TH6 appear way down on
> > 27.6
> > > Mhz or lower?
> > >
> > > I have a TH6 @ 42' and the SWR's low points (1:1) are
> > > 20.870MHz , 14.100MHz & 27.6MHz
> > > On 15m/20m it's not too much of a problem as the bandwidth is wide
> enough
> > to
> > > pretty much cover me on the CW and LO-Phone portions of the band,  but
> on
> > > 10m it's too low and the dip is quite sharp
> > >
> > > Seems it's set a wee lower than it should be in freq for 10m. There's
> also
> > a
> > > dip on 28.9MHz (2.1:1)
> > >
> > > My real question is whether I can change anything by removing only the
> > > driven element. Taking the entire beam down is pretty much out of the
> > > question.  I "think" I might be able to remove only the driven.
(anyone
> > > tried this?)
> > >
> > > I am feeding it with about 75' of 3/4" 75Ohm CATV line.
> > >
> > > Michael, Coreen & Corey Smith
> > > (VE9AA,  VE9AAA & Baby-VE9)
> > > 271 Smith Rd
> > > Waterville, NB
> > > E2V 3V6
> > > Canada
> > > http://members.tripod.com/~ve9aa/index.html
> > > http://www.geocities.com/RainForest/Vines/2174/
> > >
> > >
> > >
> > > List Sponsored by AN Wireless:  AN Wireless handles Rohn tower
systems,
> > > Trylon Titan towers, coax, hardline and more. Also check out our self
> > > supporting towers up to 100 feet for under $1500!!
> > http://www.anwireless.com
> > >
> > > -----
> > > FAQ on WWW:               http://www.contesting.com/FAQ/towertalk
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> > > Administrative requests:  towertalk-REQUEST@contesting.com
> > > Problems:                 owner-towertalk@contesting.com
> > >
> >
> >
>


List Sponsored by AN Wireless:  AN Wireless handles Rohn tower systems,
Trylon Titan towers, coax, hardline and more. Also check out our self
supporting towers up to 100 feet for under $1500!!  http://www.anwireless.com

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