[Repeater-Builder] Duplexer tuning question w/service monitor

Hi Everyone, I was helping a friend tune a Motorola T1502 duplexer yesterday, and got the following readings using a service monitor and GM300 receiver. I just want to confirm that what I did looks reasonable as I did tweak one of the band-reject loops since observing a low reading. The

Re: [Repeater-Builder] Possible desense issue, any thoughts

Hey Jed, RG-213 is single shielded. You need to install double shielded cables. Suggest using hardline, RG-214 or RG-142 for jumpers. That should cure the problem. Paul Maggiore AA3VI V.P. Maggiore Electronic Lab (HiPro) Always a

Re: [Repeater-Builder] Possible desense issue, any thoughts

At 06:34 AM 08/03/09, you wrote: Hey Jed, RG-213 is single shielded. You need to install double shielded cables. Suggest using hardline, RG-214 or RG-142 for jumpers. That should cure the problem. Paul Maggiore AA3VI V.P. Maggiore Electronic Lab (HiPro) Or RG400. Mike WA6ILQ

Re: [Repeater-Builder] Possible desense issue, any thoughts

Or RG-9/U. Norm N5NPO - Original Message - From: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com Sent: Mon Aug 03 16:20:42 2009 Subject: Re: [Repeater-Builder] Possible desense issue, any thoughts

[Repeater-Builder] update on the repeater without duplexer isolation help

My friend has a spare 6 cavity duplexer made by celwave. He tuned it into my frequency on a service monitor and was able to get around 90db of isolation. Is this a better improvement on my repeater or should I make a purchase off him?

[Repeater-Builder] WTB: Motorola Mototrbo Mobile

I'm looking for used or new at the right price. Doesn't need to be high power, have GPS or display. XPR4300 would be great. Must be in the 403-470 MHz range.

[Repeater-Builder] Items F/S

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=330349789934 One of the items that I am putting on ebay. Cat 1000b.. will be posting other items soon. Lost sites, and work slowed to a crawl. 73

Re: [Repeater-Builder] Possible desense issue, any thoughts

At 8/3/2009 14:42, you wrote: Or RG-9/U. Norm N5NPO I think most RG-9/U has copper braid, is unsuitable for use in any duplexed portion of a repeater system (from the duplexer T to the antenna). Should be OK for RX TX interconnects though. Bob NO6B - Original Message - From:

Re: [Repeater-Builder] Possible desense issue, any thoughts

Very interesting. I looked up the specs for Belden 8242 RG-9/U. I have a 6 foot piece with N type males on each end and I use it as a test jumper... According to Belden, the center conductor and the inside shield are silver plated copper. However the outer shield is bare copper. What gives???