I am using the Motorola CDM series of radios for 420-425 MHz links from voting sites. They make a low-split UHF split that covers 403-470 MHz out of the box, no mods needed. On the transmit sites, you will want to use a fan for cooling. We mount the RX radio and a UHF TX radio on a 1U rack shelf, use a 4" hole saw and drill a hole under the UHF TX radio, and purchase a nice Dayton 24vdc fan that is actually a ball bearing fan that you can count on for years of use, and let it go. Have not had any problems to date with these rigs over a 4 year span.
at W6KGBs article on moving 450-470 Mastr IIs > to 420-450. It's on the GE Mastr II page at repeater-builder. > > You could use a Mastr II UHF mobile with the receiver, > exciter and IPA converted to 420, then use the receiver > in an aux receiver chassis at the voter site. > You wouldn't need to convert the PA, the IPA (driver) > and a beam would be enough for a point-to-point link. > > Bob Meister WA1MIK did an article on converting the > multiplier chains so that the UHF Micor receivers could > hear down as low as 435 MHz (where the front ends > run out of tuning range). > > Mike WA6ILQ > > At 05:10 PM 07/27/10, you wrote: > >Thanks Jeff, I'll keep looking around for those low split UHF Micor > >receivers. What about the transmit side? > > > >Maybe I should look for a unified chassis low split UHF repeater. > >Swap out the UHF receiver for a VHF high band receiver and use that > >for my remote receiver site. Then use the low split UHF receiver on > >the other end of the link. > > > >That make sense? > > > >--- In Repeater-Builder@yahoogroups.com<Repeater-Builder%40yahoogroups.com>, > "Jeff DePolo" <j...@...> wrote: > > > > > > > When you say low split, are you talking about the Motorola > > > > TRE1201/TRE8031 406-420 Mhz receivers? > > > > > > I don't have a manual in front of me, but yes, 406-420 receivers, > they'll > > > work fine well into the mid 430's without mods. > > > > > > > What Canadian sources might have these? > > > > > > Well, Spantek comes to mind as a dealer. CW Wolfe used to get a lot of > > > stuff out of Canada, but I haven't talked to Bud in quite a few years, > not > > > sure if he's still in business. This list is probably the best > resource. > > > eBay as an alternative. If you get desperate I still have a few dozen > > > low-split Micors in the warehouse, but really don't have the time (or > > > patience) to deal with packing and shipping radios for what few dollars > I'd > > > get out of them (i.e. value of my time > $value of radio). But if you > just > > > wanted a receiver, you can consider me a last resort if you strike out > > > everywhere else... > > > > > > --- Jeff WN3A > > > > > > > > > > > > > > --- In > > > > Repeater-Builder@yahoogroups.com<Repeater-Builder%40yahoogroups.com> > > > > <mailto:Repeater-Builder%40yahoogroups.com<Repeater-Builder%2540yahoogroups.com>> > , "Jeff DePolo" > > > > <jd0@> wrote: > > > > > > > > > > > What is a good radio for building a one way 420 link? The > > > > > > link will be for a remote receiver and will not need to be > > > > > > duplex... RX at the voter and TX at the remote receiver. The > > > > > > link RX has to live on a noisy hill. Thanks for your advice. > > > > > > > > > > My preferences, in no particular order, would be > > > > Micor/SpectraTAC (low > > > > > split), Mastr II ("77" split), and Delta-S (low-split). > > > > MVP/Exec II (again, > > > > > "77" split) would be fine too. All have excellent front > > > > ends. They can be > > > > > found if you look a bit, especially check Canadian sources; > > > > they're not as > > > > > easy to find stateside as 450-470 radios, but they're not > > > > unobtainium > > > > > either. > > > > > > > > > > --- Jeff WN3A > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >------------------------------------ > > > > > > > >Yahoo! Groups Links > > > > > > > > -- James Adkins, KB0NHX Vice-President -- Nixa Amateur Radio Club, Inc. (KC0LUN) www.nixahams.net Southern Missouri Assistant Frequency Coordinator - Missouri Repeater Council www.missourirepeater.org The Nixa Amateur Radio Club - "There is no charge for awesomeness!" (Well, only $1.00 per month)
