Denny, The R1225 is just the full-duplex transceiver that is in a GR1225 or RKR1225 repeater cabinet. It is exactly the same size as a Maxtrac or GM300 dash-mount mobile radio. Since it has a built-in controller, all you need is a duplexer and the connecting cables and you have a tactical repeater. I have done this, and it works very well. There are many issues to consider when creating a full-duplex repeater from two simplex handheld radios, and I don't think you should pursue such a solution- especially since this is intended to be used where people's lives may be at risk. A PAC-RT is not appropriate for this application.
73, Eric Lemmon WB6FLY Denny wrote: > > Thanks for the input. It is 150MHz and we would have a 5Mhz split. > What is the best process for shielding the two radios? Are there > cases out there or some foil type products? What would happen if we > just connected to the two radios together and separated the antennas? > > I looked at the R1225 and it is a little big but may work if need > be. Would a Motorola PAC RT work? > > Denny > > --- In [email protected], Eric Lemmon <[EMAIL PROTECTED]> > wrote: > > Denny, > > > > The HT1000 is an excellent radio by itself, but its plastic case > offers > > no shielding whatsoever. It is possible to construct a compact low > > power repeater with the HT1000 (or any two commercial quality > portable > > radios) if each radio is enclosed in a tightly-shielded box, with > all > > audio and control leads brought out through coaxial filter > capacitor > > terminals. The antenna lead would need to be brought out through a > > separate bulkhead connector. > > > > Once you have a completely shielded transmitter and a completely > > shielded receiver, connect them to a compact (mobile) duplexer with > > double-shielded cable such as RG-400/U. You will need a > rudimentary > > controller to handle the simple repeater functions. I am assuming > that > > the pair you intend to use in the 150 MHz VHF band has a 5 MHz > split; if > > it is less, a mobile duplexer won't work. > > > > It would be a lot easier to use a 10 watt Motorola R1225 repeater > > transceiver, instead of two separate radios. > > > > 73, Eric Lemmon WB6FLY > > > > > Yahoo! Groups Links > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
