Polyphaser. Period.
End of discussion...... ;-) George, KA3HSW / WQGJ413 > >From: Mark Thompson <[email protected]> >To: [email protected]; [email protected]; >[email protected] >Sent: Friday, July 10, 2009 2:11:52 PM >Subject: [Repeater-Builder] Need Lightning Protection Equipment Recommendatoin >for Building Repeater Site > > > > > >I am involved with a ham radio club that has repeaters on the top of a >55-story condo building 6 miles north of downtown Chicago on the Lake Michigan >lakefront. The club is a general purpose ham club, not a repeater club, and >does not seem to have any members who are in the 2-way radio business or have >experience with commercial repeater site installations. > >They've had a 70cm FM repeater on this building for about 15 years. It has >never had any form of lightning protection equipment protection equipment. The >club has been lucky and not experienced any apparent problems from lightning. > >Within the last two years the club has replaced it's Icom 70cm FM repeater >with a new commercial Motorola 70cm FM repeater. They've also added a D-STAR >70cm Digital Voice repeater, a D-STAR 23cm Digital Voice repeater and a D-STAR >23cm Digital Data Access Point. It's possible a 23cm FM repeater will also be >added soon. > >There are three antennas on the roof currently for 70cm FM, 70cm D-STAR and >23cm D-STAR. A fouth antenna may be aded for 23cm FM. All antennas are fed >with hardline & ultimately terminated in N connectors at the repeaters. > >It is a very ham friendly site and we can do work on the repeaters & the roof >unsupervised. The only other repeater system on the building is a high-band >U.S. government repeater adjacent to the ham repeater equipment rack. The >government repeater seems to be grounded to a grounding bar running through >the equipment room. > >These new repeaters & antennas should have lightning protection. My question >to the group is what form of lighning protection would you recommend for these >repeaters. I assume Polyphaser equipment is one option, but we need >recommendations of specific brands & model #s of equipment with approximate >prices if you have them. We plan to review any recommendations received & then >forward them to the club's board of directors for acquisition & installation. > >Please reply to me directly and thanks in advance for any advice you have. > >73, Mark, WB9QZB >Chicago, IL >
