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