Bob, How much noise? I have a current situation at 580 ft. I'm diagnosing.
Station works fine into a dummy load tested with a sampler slug and no desense. Add the feedline and antenna and I get 15db degradation. I have looked at the freqs the ant is hearing and don't see an IMD issue. Spectrum looks normal. The problem is a steady 15 db. I think it's the db antenna. We're 20ft from the top of the tower. Any suggestions before we pay a climber? 73 Don Kirchner W5DK From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Sunday, June 01, 2008 12:48 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: noise on exposed folded dipole arrays and fiberglass encased antennas - YES At 5/31/2008 21:30, you wrote: > > Fiberglass encased antennas get blown to kingdom come more > > often than exposed dipole arrays. Exposed dipole arrays may appear to survive lightning strikes, but they can still suffer damage that may not be visibly apparent. We have a Sinclair 4-dipole VHF antenna that became unusable after a near hit: it now generates noise if used on TX. Perfectly good for RX, though. We now use it for RX only & TX with a Comet GP9. Bob NO6B
