Uhf the link is 517mhz and the repeater TX/rx pair is 473.475 and 478.675mhz on one repeater and it is in a weak area with the main site so it has to transmitt aprox 10 watts Thank You, Ian Wells, Kerinvale Comaudio, 3A Murchison Street,Biloela.4715 Ph 0749922449 or 0409159932 or 0749922574 www.kerinvalecomaudio.com.au -------Original Message------- From: Doug Bade Date: 6/28/2010 12:59:24 AM To: [email protected] Subject: Re: [Repeater-Builder] Coax shielding At UHF, possibly, at VHF unlikely... you did not specify :-) How close are the frequencies??? Lots of details left out for us to help. If the freq's are within a few hundred kiloherts at vhf, antenna separation is probably the issue... More details please?? Doug KD8B
kerincom wrote: > > > Hi guys .I am just wanted to confirm a question on coax shielding . > With 2-10 watts transmitting through rg213u could rf be escaping that > could cause desensitization to other radios .The repeater I have > setup uses 9 meters of heliax from the main diplexer to ant and > rg213u from the link radio to its antenna . > I am finding I am getting problems with the link > transmission interfering with the repeater rx The link antenna is a > yagi 3 meters above the ground and the main repeater antenna is 6 > meters above it .I am currently trying band pass cavity on the > receiver rx or band pass/band reject diplexer with some success but I > am wondering if the rf escaping from the cable is causing problems > inside the repeater shed even at a low wattage .I am definitely > changing the rg213u to either rg223u or lmr400 as it is only on the > link radio and shouldn't have any effect on the repeater's operation > .Has anyone else had the same sort of problem where the rf energy > leaks out of the cable in the shed and causes problems to the repeater > and they had to upgrade the link cable to 100% coverage cable > > > > Thank You, > Ian Wells, > Kerinvale Comaudio, > 3A Murchison Street,Biloela.4715 > Ph 0749922449 or 0409159932 or 0749922574 > www.kerinvalecomaudio.com.au <http://www.kerinvalecomaudio.com.au> > > > > >
