RE: [Repeater-Builder] Anyone here who can answer a question about cabling?
Terry, If you are using LMR for feed-line you will most likely have trouble eventually. But the problem you described sounds more like static electricity build-up.. read this article.. http://www.repeater-builder.com/antenna/static.html mike -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of tdettmann Sent: Friday, March 31, 2006 1:07 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Anyone here who can answer a question about cabling? I had a question from a friend which I can't answer ... I've never heard what he's referring to. Is there anyone here who can confirm or correct this: One of our local repeaters has a popping noise that gets severe during high wind conditions. I have heard that LMR type coax can cause this noise. Various reasons have been discussed including the dis- similar metels between the inner and outer shield, also nicking the copper clad on the center conductor. I am told this condition only occurs on a repeater using the same coax for Rx and Tx. The repeater in question has a very clear signal when transmitting, the noise only comes on while receiving a signal, both with and without modulation. This leads me to susspect the dis-similar metals theory. I'd appreciate any insight you may have on the question, preferably directly to me Thanks in advance Terry WX7S 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/
Re: [Repeater-Builder] Anyone here who can answer a question about cabling?
At 10:06 AM 03/31/06, you wrote: I had a question from a friend which I can't answer ... I've never heard what he's referring to. Is there anyone here who can confirm or correct this: One of our local repeaters has a popping noise that gets severe during high wind conditions. I have heard that LMR type coax can cause this noise. Various reasons have been discussed including the dis- similar metels between the inner and outer shield, also nicking the copper clad on the center conductor. I am told this condition only occurs on a repeater using the same coax for Rx and Tx. The repeater in question has a very clear signal when transmitting, the noise only comes on while receiving a signal, both with and without modulation. This leads me to susspect the dis-similar metals theory. I'd appreciate any insight you may have on the question, preferably directly to me Thanks in advance Terry WX7S Check out these two pages: http://www.repeater-builder.com/antenna/static.html http://www.repeater-builder.com/antenna/cracking.html These pages are linked off the master index page for antennas, duplexers, isolators, etc at http://www.repeater-builder.com/rbtip/ant-sys-index.html Mike WA6ILQ 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/
