Polyphaser.
Period.
End of discussion.. ;-)
George, KA3HSW / WQGJ413
>
>From: Mark Thompson
>To: repea...@yahoogroups.com; Repeater-Builder@yahoogroups.com;
>repeat...@yahoogroups.com
>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
>