At 8/31/2008 10:35, you wrote: >-----Original Message----- >From: [email protected] >[mailto:[EMAIL PROTECTED] On Behalf Of Eric Lemmon >Sent: Sunday, August 31, 2008 12:30 PM >To: [email protected] >Subject: RE: [Repeater-Builder] Wits End -- Desense > > >> >>The Yaesu FTR-1510, like the similar low-tier products from Kenwood, >>Motorola, Icom, and Ritron, is intended for less-stringent applications- >>construction sites, shopping malls, race tracks, etc. As I have mentioned >>in other postings to this list, some of these boxes are equipped with >>single-braid coaxial cable to connect various modules within the enclosure. >>The Motorola GR1225 and Vertex VXR-5000 are examples of this cost-cutting >>practice. I have corrected significant desense in these two models by >>replacing the internal jumpers with RG-400/U cable. > >I have performed the test described below, and the result is that there is >desense within the repeater. The cables appear to be good, i.e. the >shielding appears to be heavy silver coated braid. Nevertheless, the >cables are about the only possibility left that I know of. I guess I have >to check them or replace them next.
This is a long shot, but check the regulated voltages inside the repeater. If it uses a common buss like the 10V inside the GEs & something in the TX is loading it down, the symptom could appear to be desense. Can't say I've ever seen this before, but it's possible. Bob NO6B
