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. And... I'll have to find a Station that was built as a Remote with the T/R relay if I feel like using one antenna... or re-jumper everything and put in an LPF board that has a T/R relay in it. (Sheesh, I'm usually ripping those OFF the LPF board if I don't have an LPF board with a Z-matcher on it to use in a PA!) Actually, come to think of it, I don't really want to waste a UHF PA deck... maybe will just split the thing to two antennas but set it up for half-duplex operation... easy enough to figure out. Just gotta dig through the system board and 10V regulator LBI's to get the right jumper config. Well... hmm. We do have a 40W UHF PA deck that's marked "questionable"... I could see what's wrong with it... if anything... 40W into the 6-element link yagi bore sighted on the repeater... you know, knowing my luck, I'll just light up the whole Front Range and cause myself multi-path problems... (snicker... damn Murphy!). (Not to mention making UHF unusable at my QTH overall... ha!) I seem to recall Dave Cameron VE7LTD had just mentioned he'd recently played with the remote audio card to get audio in/out for something he was working on... normally that card is tossed in the "junque" box around here, along with the transformer for the 4-wire audio, so I've never played with them. Maybe I'll have to pester him for his notes. I think one of the Stations I acquired recently still had all the cards in the shelf and various do-dads still in it and it was configured as a remote w/o repeat... ahh the possibilities... And I thought I was DONE building the link radio two weeks ago! :-) LOL! Thanks guys, cool discussion. Nate WY0X
