At 11/28/2006 12:23 PM, you wrote: >Bob Dengler wrote: > > At 11/28/2006 10:49 AM, you wrote: > >>> Not quite, as 145 MHz will never make it through the UHF > >>> helicals. It's > >>> just leaking out of the RX & case. Neil's got the easiest > >>> solution: order > >>> a high-side LO xtal for your 447.575 RX. > >>> > >>> Bob NO6B > >> But that will just move the problem somewhere else...up to 152.925 > where you > >> might make even more enemies than on 145.460... > > > > If Nate has a neighbor that likes to listen to 152.925, then yes. > > > > Bob NO6B > >It's reeeeeealy weak, Jeff. > >I'll probably move the ICOMs into a Station just to get a little more >shielding first just to see if it helps, and then order crystals if that >doesn't work... Guess I could just move the RX ICOM first and see how >bad it is before futzing around with tuning the TX side. > >It probably doesn't help that the cables going to the PC aren't coming >out of the case via any kind of feed-through caps, etc... bad Nate, no >donut. They probably make nice antennas at VHF. :-) > >If it's in a Station, I can pull the audio and and signals needed off >the backplane, which have already been nicely isolated from the "guts" >of the radio with the built-in feed-through caps, etc - of course. > >I was just wanting to not waste a complete Station shelf on a link radio >that only needs 250mW to be full-quieting or darn near close to it.
If you have an MVP lying around, you might have better luck with it. It's I/O connector has feedthrough caps on each line, just inside the case. I do hear LO leakage out of them too, but not quite the level you experience. Bob NO6B
