Topband: Topband Tower Antenna With Two meter Vertical

[ZR]

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" <n1wr at chesapeake.net>
To: "topband" <topband at 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" <w0rihps at sbcglobal.net>
> Sent: Sunday, April 15, 2012 12:11 PM
> To: "'Wayne Rogers'" <n1wr at chesapeake.net>; "'topband'"
> <topband at 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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