Ken, If your T1500 cavity is the "loop" type such that the SO239's are closer to the tuning screw, you can set the pass to 434.xxx and the reject to 442.675, but might have to move the stationary knob to the outer position to get greater than a 5Mhz split. Rejecting that way is only effective for the transmitter freq. - those cavities don't have much pass protection. If you have a 1507 type "pass-only" (no notch knobs), then simply tune for 434.xxx pass - that will protect the receiver to a point (probably -25dbm per can).
I have a 40W UHF test machine running with two narrowband GM300's and a 1507 with no desense. Wondering what link radios your looking at (can reply privately if you want). Tony Ken Arck wrote: > > Ok, so here's the deal.... > > I'm running a high power UHF repeater that transmits on 442.675 (60 > watts out of duplexer). As part of the same system, there is a link > receiver on 434.xxx. The link receiver is being de-sensed by the > repeater xmtr > (I'm guestimating around 6 dB or so). While I consider a better radio > for the link, I'm thinking of a quick solution. > > As I have some extra Batwing T-1500 series cavities laying around, > I'm thinking about terminating one port with a 50 ohm load and T'ing > the other port into the link receive line and tuning the cavity for > (obviously) 442.675. > > I'm thinking cable length between the T and the cavity is kinda > irrelevant in this case. Sound about right? > > Ken > ------------ --------- --------- --------- --------- --------- - > President and CTO - Arcom Communications > Makers of repeater controllers and accessories. > http://www.arcomcon trollers. com/ <http://www.arcomcontrollers.com/> > Authorized Dealers for Kenwood and Telewave and > we offer complete repeater packages! > AH6LE/R - IRLP Node 3000 > http://www.irlp. net <http://www.irlp.net> > "We don't just make 'em. We use 'em!" > > ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) <*> To change settings via email: repeater-builder-dig...@yahoogroups.com repeater-builder-fullfeatu...@yahoogroups.com <*> To unsubscribe from this group, send an email to: repeater-builder-unsubscr...@yahoogroups.com <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
