Bob, I find your reply quite interesting... we have had a similar problem in the past. There is a DB-Products dipole used by the water Dept (on 150 something MHz) on our tower that was abandoned, and left un-terminated. And it is in the aperture of our antenna at approx 30 foot away.. I think I may journey to the site with a dummy load next time it pops up... And yes, I have tried to talk them out of it... so far no replies to my queries...
mike -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] Behalf Of Bob M. Sent: Wednesday, November 23, 2005 9:47 AM To: [email protected] Subject: [Repeater-Builder] Update: Looking for a UHF Circulator and load First, I would like to thank everyone who responded to my original post with suggestions, information, and similar problems. Here's an update to the situation. Late Monday afternoon/evening, the coax/antenna was swept (from the bottom) with a site-master unit and no problem was found. There's an unused 800 MHz vertical antenna mounted near the UHF antenna, on the platform, with coax attached. Apparently the dummy load at the bottom of the coax for that antenna was either missing or defective, so another one was put on. The repeater's desense problem is completely gone now, even with the 200w PA and the 17dB gain preamp. I don't know if there was desense immediately before playing with that dummy load, nor if they restored the situation to what it was previously to check if the desense reappeared. For all we know, with the high winds and rain we had Monday, something up at the antenna (the jumper, for example) could have moved enough to _cure_ the problem, even temporarily. Nothing else was done at the site on Monday, but the repeater is working as good as it was when it first went on the air. If the desense condition returns, we'll obviously have to go looking for it again, but maybe a visit to the top of the pole would be in order. Anyway, my search for a circulator is temporarily on hold. Sure, it would be desirable to have one, but not absolutely necessary for proper operation of the repeater. Bob M. __________________________________ Yahoo! FareChase: Search multiple travel sites in one click. http://farechase.yahoo.com Yahoo! Groups Links Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
