Just split the duplexer and you one half of it into your receive line. Tune it up to pass your 434.xxx channel, then fight with the rejection for your 442.675 channel. You should see 60+ dB of reject. (HINT - one most of those duplexers (if I remember right), there is an adjustable cap down in between the rejection sliders that will allow you to finesse that thing for odd ball operations).
I have some link radios running within 0.3 MHz of my repeater transmitter with no desense ... vertical isolation and a directional link antenna .... better than any duplexer! James WJ1D 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.arcomcontrollers.com/ > Authorized Dealers for Kenwood and Telewave and > we offer complete repeater packages! > AH6LE/R - IRLP Node 3000 > http://www.irlp.net > "We don't just make 'em. We use 'em!" > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > > >
