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" <[email protected]> To: "topband" <[email protected]> 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" <[email protected]> > Sent: Sunday, April 15, 2012 12:11 PM > To: "'Wayne Rogers'" <[email protected]>; "'topband'" > <[email protected]> > 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 > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 10.0.1424 / Virus Database: 2411/4946 - Release Date: 04/19/12 > _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
