Mike Try the midland 520's low band radios with a vhf or uhf ht built in for cross band. Maybe 2 of them,1 on each band split then different xband freqs. Put the red cross radio in scan and away you go. I believe you can program different xband freqs to match the different low band chans so several can be programmed the same and used on different chans.
They also have a neat feature I have heard that if several people arrive at a scene with xband on, the first one does xband for all and the others go into standby automatically to avoid interference. Anyway neat radio, cheap and easy to program with free software. Rob KS4EC Sent by Good Messaging (www.good.com) -----Original Message----- From: Mike Morris WA6ILQ [mailto:wa6...@gmail.com] Sent: Saturday, September 12, 2009 01:53 AM Eastern Standard Time To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Diplex antenna installation using coaxial cable for 10M and 6 M At 05:32 PM 09/11/09, Joe, K1ike wrote: >The average coax cable of 1985 vintage probably had a velocity factor of >66%. If you didn't figure this into your calculations the coax would >appear to be about 1/4 physical length, but would be an electrical 1/2 >wavelength. Did you use a velocity factor in your calculations? > >Would it be possible to scan the Motorola document that you have and >post it to the group? I've heard of it but I've never seen it. It's been on the repeater-builder website for several years, on the Antenna Systems page, in the Mobile section. It's about the 5th one up from the bottom. I've been thinking about setting one up, as a future project is to set up a mobile, either a low band Syntor-X9000 or a Maratrac, with some channels on Red Cross and the rest on amateur 6m. I may have to go to a screwdriver antenna as a 1mhz wide window for 6m may not be enough.... We currently have active 6m repeaters from 51.24 to 53.76 Mhz. See <http://www.scrrba.org/BandPlans/51-54.pdf> And local Red Cross uses 43.00, 45.92, 47.42, 47.46, 47.50, 47.54, 47.56, 47.58, 47.62, 47.66 and a few high band and UHF channels. The 47 MHz channels will be no problem in a 1 mhz wide dual-whip system, the 45.93 and 43.00 channel will be a problem. The radio isn't the problem it would have been when I still had Motracs in a Ford station wagon with . It's going to be interesting to make a low band mobile antenna work across all the channels. And then to make a 99-channel MT1000 do it as well. Low band rubber ducks make better blackjacks than antennas, but that's the only thing that isn't fragile. It may take two separate rubber ducks - one for Red Cross, one for 6m. Or a UHF handheld talking to/from UHF to low band mobile crossband repeater. Mike WA6ILQ Since 1974, the award-winning Alpert JFCS has helped families of all faiths throughout most of Palm Beach County, FL, via counseling, seniors services, residences for the disabled, mentoring children, support groups and a lot more. SOLUTIONS FOR LIVING www.JFCSonline.com Please take note of our new website and E-Mail Addresses. Please update your contacts ASAP. -------------------------------------------------------------------------------- NOTICE: This e-mail message and all attachments transmitted with it are intended solely for the use of the addressee and may contain legally privileged and confidential information. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately by replying to this message and please delete it from your computer.
