Thanks for the tip. Well it was worth a try. I had it given to me for use as a repeater. It's a new unit that never even got used, but sad to say the ovens are gone. Suppose it's a good boat anchor. Large paper weight.
Mathew --- In [email protected], Mike Morris <[EMAIL PROTECTED]> wrote: > At 09:04 PM 3/21/04 +0000, you wrote: > > >I have a motorola Motrac Radio, can anyone tell me if this unit can > >be converted to use as a repeater, and what is needed for the > >crystals. Any help on this would be appreciated. What could be > >used for a simple controller with little to no hangtime? Thanks. > > > >Mathew > > The mobile Motracs are all over 30 years old and the insulation > on the internal wiring (at least on mine is starting) to flake off. > Given that situation I would not trust a Motrac in a mission- critical > environment. > > The early Motracs - the HHTs used crystals in ovens. I do not > know of anybody that is still making oven crystals. The LHT series > and MHT series used channel elements - packaged transistorized > crystal oscillators. The UHF LHTs and MHTs used a funny two-piece > element that is hard to find, but a one-piece blue element can be made > to work just fine by changing one resistor inside. > > Also the heat sinks on the tubes are made for a 10%-30% > duty cycle - and the heat transfer characteristics is such that > they can't "suck" the heat off fast enough for repeat duty. > > Mitreks make better low power low-duty-cycle repeaters if > a crystal based radio is OK.... You can get them for $20-50 each. > If you need a high duty cycle repeater go with a GE master-II. > > And if you need synthesized, two Maxtracs can be cross- > connected into a dandy little low duty cycle repeater... > > As to a controller, any of the current crop can be set for a low > hang time. The cheapest is the NHRC kit. > > Mike 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/
