Thanks Buch, I'd like to build the link so that it transmits all the time. That minimizes key up delays and reduces intermod on the hill. So need something that can key down forever. -- Tim :wq
On Aug 6, 2010, at 3:13 PM, Glenn (Butch) Kanvick wrote: > Hello Tim. > Yes, the CDM's probably will not do the 24/7 even with cooling as they are > designed for a 5 per cent duty cycle, maybe 10 per cent if you are very lucky > and it stays in an air conditioned room all of it's life. The CDM's are a > mobile version plus you need two of them, one for TX and one for RX, then you > need the Motoroal RICK to make them work. > > Have a great weekend. > > Butch, KE7FEL/r > > On Fri, Aug 6, 2010 at 3:46 PM, Tim Sawyer <tisaw...@gmail.com> wrote: > Oh, sorry Butch. I was asking James about the CDM radios.I know the Micor's > are 7x24x365. > -- > Tim > :wq > > On Aug 6, 2010, at 12:30 PM, Glenn (Butch) Kanvick wrote: > >> Hello Tim. >> >> These do not have a fan on them, but adding a fan(s) would make the air pass >> by the cooling fins much faster. >> These are the continious duty PA's with the huge heatsink on the rear of the >> PA. >> I am not sure what Motorola's duty cycle is for these PA's. >> >> Attached is a picture of the PA. >> >> On Fri, Aug 6, 2010 at 12:26 PM, Tim Sawyer <tisaw...@gmail.com> wrote: >> >> How about duty cycle? Do you think this set up would transmit 7x24? >> >> -- >> Tim >> :wq >> >> On Jul 28, 2010, at 7:46 PM, James Adkins wrote: >> >>> 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. >>> >>> >> >> >> >> >> >> <100_1894.jpg><100_1895.jpg> > >
