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Re: [TowerTalk] Terminate unused ports on remote antenna switch?

To: "'Tower Talk'" <towertalk@contesting.com>
Subject: Re: [TowerTalk] Terminate unused ports on remote antenna switch?
From: <k1ttt.dave@gmail.com>
Reply-to: k1ttt@arrl.net
Date: Wed, 11 Aug 2021 07:20:50 -0400
List-post: <mailto:towertalk@contesting.com>
Raymond, the original post was about a 6 port switch....   it sounds like you 
are talking about a 4-square box where you only have 2 of the 4 verticals 
connected.  If that is the case it is much different than the original question 
and we would need much more information to give logical suggestions.  To reply 
in this case we would need to know what type of 4-square box you have and how 
far apart the 2 verticals are, are they adjacent corners of a 1/4 wave square 
or opposite corners?  If the box is a comtek style hybrid network then using 50 
ohm loads would be wrong, those boxes expect 100 ohm loads (50 ohm base 
impedance transformed through 1/4 wave of 75 ohm coax). 

David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: telnet://k1ttt.net:7373


-----Original Message-----
From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of Raymond Benny
Sent: Tuesday, August 10, 2021 19:07
To: Mark - N5OT <r-emails@n5ot.com>
Cc: Tower Talk <towertalk@contesting.com>
Subject: Re: [TowerTalk] Terminate unused ports on remote antenna switch?

Yes, it would be great to have all four antennas up and ready to go. But until 
then your reply does not answer the question.

I'm in the same boat. Two of the four 80m verticals are up and functional 
individually. I am hoping to get the other two before winter arrives, but real 
time life situations seem to get in the way. Besides, I have several other 
antenna projects I have to trade off my time with.

For my situation, I am planning to install 1 kw dummy loads to the unused ports 
and see what happens. I was hoping that someone would provide some realistic 
input to this situation. And, of course, you are welcome come here and lend a 
hand....

I'm open for some real suggestions.

Ray,
N6VR/W7YA

On Tue, Aug 10, 2021, 3:34 PM Mark - N5OT <r-emails@n5ot.com> wrote:

> Correct answer.
> N5OT
>
>
> On 8/8/2021 6:54 AM, k1ttt.dave@gmail.com wrote:
> > The proper thing to do is to add more antennas until you fill up all 
> > the
> ports!
> >
> >
> > David Robbins K1TTT
> > e-mail: mailto:k1ttt@arrl.net
> > web: http://wiki.k1ttt.net
> > AR-Cluster node: telnet://k1ttt.net:7373
> >
> >
> > -----Original Message-----
> > From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of WW3S
> > Sent: Saturday, August 7, 2021 19:57
> > To: TowerTalk <towertalk@contesting.com>
> > Subject: [TowerTalk] Terminate unused ports on remote antenna switch?
> >
> > Have a 6 port antenna switch, outdoors, but in an enclosure…..whats 
> > the
> thoughts on terminating the unused ports, terminate or just leave open ?
> >
> > Sent from my iPad
> > _______________________________________________
> >
> >
> >
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> >
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