[K3PZN-List] Two monobanders on the same tower

[Peter Morton]

Joe-

Were you attempting to feed both antennas with one feed line that required 
the use of matching stubs?  I intend to run separate feedlines and am 
wondering if the close spacing of the antennas will affect the VSWR.

May have to wake up my computer with the NEC modeling software.

-Pete, W3GVX

-----Original Message----- 
From: Benjamin Horton
Sent: Thursday, October 17, 2013 11:23 PM
To: Carroll County Amateur Radio Club
Subject: Re: [K3PZN-List] Two monobanders on the same tower

Years ago ( Back in the Seventies) We set up  a 10 over 15 meter pair of 
three element antennas.  I do remember some separation issues associated 
with the lash-up.  If memory serves me correctly, I think we settled out 
with a bit over ten (10) feet of separation as the magic number. Did this 
down at my father-in-law's house on Rehobeth Bay and it did work well 
finally.  Took us about three months to get it right but it put out a really 
decent signal.  We finally settled on a single three element Yagi on 20, 15 
and 10 meters for simplicity.  After a couple of cable harness issues and 
some matching stubs we got it right on the single element antennas.  They 
will work....just hafta have a bit of patience.  Regards, Joe  --  K3FPE



________________________________
From: Peter Morton <mortonph at comcast.net>
To: CCARC <k3pzn-list at mailman.qth.net>
Sent: Thursday, October 17, 2013 10:56 PM
Subject: [K3PZN-List] Two monobanders on the same tower


If I mounted two monoband yagis on the same mast separated by about 4 feet, 
will one affect the pattern of the other and will there be other 
interactions?   I’m thinking of putting two 3-element Hy-Gain Long Johns, 
one 15 meter and one 10 meter, on the same mast.  And then later, as we near 
the solar minimum, switching out the 10 meter and installing a 20 meter Long 
John.

Just thinking.  I still have Willie Mike’s A4S to refurbish.  Or, maybe pick 
up a Moseley TA-63-N that covers 20 thru 6..

-Pete, W3GVX
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