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[TowerTalk] How Important is F/B?

To: <>
Subject: [TowerTalk] How Important is F/B?
From: (Bob Wruble)
Date: Thu, 26 Jun 1997 09:22:22 -0700
some time a low fb is useful but to me its not wat i want from
oregon when beaming eu with calif stn's blowing in off the 
back.......other than 20m it mite not matter so much fer me.


> From: Gerald J Kersus <>
> To: Bill Fisher - W4AN <>
> Cc:
> Subject: Re: [TowerTalk] How Important is F/B?
To: <>
> Date: Thursday, June 26, 1997 6:36 AM
> On Thu, 26 Jun 1997, Bill Fisher wrote:
> >Now, in regards to the TH7 vs KT34XA.  Gee... I dont know.  Both are good 
> >antennas.  KT34XA has more gain and more potential pain.  Personally I 
> >like to put up an antenna and not think about it any more.  I've never 
> >heard of anyone taking apart a TH7 and putting it back together again 3 
> >times because it wouldn't work right.  I've heard this story twice in 
> >regards to a KT34XA.
> Let me be at least the third to tell that story.  I rebuilt an XA about
> 3-1/2 years ago.  Last October, on the Tuesday before CQWW Phone, I found
> the SWR on 20 to be much higher than normal.  Problem got better when it
> rained.  So, I took it down, found a bad connection in the reflector,
> cleaned it, used No-Alox (instead of the copper-colored stuff KLM provided)
> and got it back up in time for the contest.  Only now, the low end SWR on
> 15 was higher than normal!  I took it back down after Phone and before CQWW
> CW, but found nothing obviously wrong.  This past weekend, I took it down
> again and completely rebuilt the reflector and two driven elements.  (This
> time I used No-Alox for all the connections.) The low end SWR is somewhat
> better -- not completely right but probably good enough. 
> As for the XA itself, it works great!  I actually find the low f/b helpful
> in contests:  It's nice to be able to work JAs and So. Americans at the
> same time.  Also, spraying some RF off the back sometimes (and ONLY
> sometimes) helps keep those stations to the S and SW from trying to steal
> my run frequency to Europe!
> Gerry, W1GD
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