[TowerTalk] How High is enough...(HFTA) now

Cqtestk4xs at aol.com Cqtestk4xs at aol.com
Thu Aug 1 10:09:24 EDT 2013

It's amazing how different results can be at different  stations.  W4ZV 
says the same thing...no difference.
However, at four different stations I've had,  BIP/BOP makes a  difference. 
 Sometimes BIP and BOP are equal, other times there may be a  difference of 
1 to 2 S units.  This occurs on both domestic and DX  stations.
The only time it does not is on the long haul stuff like UA9/VU2  etc.  
There it is always better on BIP.
My phasing may be different than many as I feed the top two of my  stacks 
and the bottom two separately.  I then BIP/BOP the two.  On 40  however, my 
stack is phased in the conventional way...with phasing harness and  an 
Ameritron RCS8 box.
YMMV, obviously
In a message dated 8/1/2013 1:50:20 P.M. Coordinated Universal Time,  
k1ttt at verizon.net writes:

I  tried BIP/BOP on 10m and saw no advantage to it... but stacking antennas 
at  30'/60'/90'/120' with various combinations and single antennas 
available is  definitely an advantage

Aug 1, 2013 09:34:49 AM, john at kk9a.com  wrote:

A lot can be done with two tribanders. Besides changing the  radiation
angle you can also beam in two directions which is very useful if  you

I had BOP capabilities with my 40m beams. I thought  that it would be great
for the one domestic contest (November  Sweepstakes)that I operate however
I have never found this option useful. I  have never tried it on other

John KK9A

To:  TOWERTALK at contesting.com
Subject: Re: [TowerTalk] How High is  enough...(HFTA) now
From: Cqtestk4xs at aol.com
Date: Wed, 31 Jul 2013  21:31:30 -0400 (EDT)

Having the ability to change that optimal  angle is a big advantage.
Although my stacks are all very high, the ability  to BIP/BOP them allows
me to
accommodate the higher angles that are not  covered by the higher antennas.

Of course, if you don't have stacks,  you can do the same sort of thing
with a second antenna at 50 feet. Not  only does this allow a change of
but with this proper phasing  apparatus you now have a second antenna...but
also a stack that can be  switched in and out of phase.

That would be my  recommendation.

Bill  K4XS/KH7XS


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