Since there is no need to run any cables inside the tower I wouldnt worry
about it. As long as there is good RF contact between sections it should
work well from 160 to wherever you want as many have done.
Carl
KM1H
- Original Message -
From: Wayne Rogers n...@chesapeake.net
To: topband topband@contesting.com
Sent: Thursday, April 19, 2012 11:37 AM
Subject: Re: Topband: Topband Tower Antenna With Two meter Vertical
Thanks to all that have responded. My concerns have been lessened and I
appreciate that.
My tower is 200 feet from the house. I already have 7/8 hardline run up
the tower (Rohn 25, run outisde). I'm not sure how successful I would be
trying to run it inside - the tower is small and the hardline tough to
work
with. I have a substantial grounding system around the house and all my
coax from the tower is connected through surge arrestors and tied to a
common ground at the entry point. I am comfortable with this.
Thanks all that responded. I am currently waiting delivery of a side
mount.
I'll advise the results when all is up and running.
73, Wayne
--
From: Price Smith w0ri...@sbcglobal.net
Sent: Sunday, April 15, 2012 12:11 PM
To: 'Wayne Rogers' n...@chesapeake.net; 'topband'
topband@contesting.com
Subject: RE: Topband: Topband Tower Antenna With Two meter Vertical
Sent: Sunday, April 15, 2012 10:49 AM
To: topband
Subject: Topband: Topband Tower Antenna With Two meter Vertical
Maybe a bit off topic, but I'm hoping someone can give me some insight.
I use my 90' tower as a vertical on topband. It's base is grounded, and
I
feed it with a gamma match. Works great. OK so far.
I want to put a two meter vertical on the tower which will be used for
ARES
(packet, continuous 24/7 connected up to the two meter radio.
My concern is protecting the two meter radio when I'm transmitting 1500
watts into the tower on 160 meters. Would like to hear from anyone who
is
doing this - will a simple high pass filter at the input to the two meter
radio suffice to protect the radio from 160 meter RF?
Also - on the antenna installation. Typically the two meter vertical's
outer conductor will be grounded to the tower at the base of the two
meter
antenna. I could also keep the two meter antenna insulted from the tower
for its entire length up to the lightning protector just before it enters
the house. What's the recommended practice? Ideas?
Thanks, Wayne N1WR (160 op and also AEC Calvert Co. MD)
___
UR RST IS ... ... ..9 QSB QSB - hw? BK
Wayne,
I have 80ft of Rohn 45 tower with a 5el 20 meter beam at 81ft, 3el 15 at
90ft and 3el 10 at 100ft. I have a Diamond X200 on a side arm at 70ft. I
shunt feed
The tower with an Omega match. All the coaxes come to the ground. They go
underground for 5ft to a box with PolyPhaser arrestors. Then they go
into
the
House to my equipment. I put 10 snap-on ferrite cores on the 2meter coax
in
the house. I have no inter action even when running QRO on 160 meters.
The
Coaxes are NOT connected to the tower except at the shunt feed.
I hope this helps.
73 Price W0RI near St. Louis, MO
___
UR RST IS ... ... ..9 QSB QSB - hw? BK
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___
UR RST IS ... ... ..9 QSB QSB - hw? BK
