The advice always is to turn off the extender/noise blanker in repeater service, or find a receiver that does not have an extender/noise blanker.
------ Original Message ------ Received: Sat, 22 Dec 2007 07:48:44 AM CST From: "Al Wolfe" <[EMAIL PROTECTED]> To: <Repeater-Builder@yahoogroups.com> Subject: [Repeater-Builder] Re: ten meter desense help > Keith, > Some of the local guys here had a similar problem and setup as you on > ten meters. It turned out that the transmitter, even though several miles > away, was saturating the extender (noise blanker). Turning off the extender > on the receiver solved the desense problem. > > These were not Motorola savvy guys and didn't really know what an > extender was or did or how they worked. > > It may be possible to retune the extender receiver to a different > frequency far enough away from the transmit frequency and still be effective > but not desense. YMMV. > > Merry Christmas, > Al, K9SI > > > >> "kb1we6r" <[EMAIL PROTECTED]> wrote: > >> I need ideas to cure desense on a 10 meter repeater. > >> Details; > >> 1. 100KHz split, (29.66 out 29.56 in) > >> 2. Maxtracs on both ends, UHF link > >> 3. Several miles of separation > >> 4. Sometimes it works OK with no desense, but usually when the tx > >> comes up, a buzzing type of noise wipes out most signals, even ones > >> that were full quieting before. > >> 5. The buzzing sounds like powerline noise. > >> 6. There is some kind of wireless node nearby. > >> > >> What other types of noise generators could be exagerated by the > >> additon of the 10m transmitter? > >> > >> Is it possible to make a notch filter out of big hardline at 100KHz > >> with acceptable insertion loss? > >> > >> Would a window filter (DCI type) help with that type of noise? > >> ...Keith WE6R > > >
