The dual RX versions you mention were not as special as someone
might think. The PAC-RT was designed from the beginning to have
two radios in it - the manual I have shows standard part numbers for
the dual radio models.
Picture a highband PAC on a lowband mobile, but on a half-duplex
dispatch system (i.e. the mobiles talk back on a frequency different
from the dispatcher talking out). The mobile is repeating the dispatch
frequency to the handheld. Adding the second RX allows the handheld
to be used to monitor the mobile TX frequency.
Anther use would be used to monitor the car-to-car simplex frequency.
The CHP (and I'm sure many other agencies) have a car-to-car tactical
channel that is separate from the dispatch channel. Here in CA every
patrol car has it's local channel plus the "blue" channel (they were named
from the color dots that were placed on the frequency switch positions
back when they got their first multichannel mobiles back in the late 1950s).
A PAC-RT could have it's second RX on "blue" allowing the officer to
monitor dispatch and "blue" from his handheld. And I saw one PAC-RT
at a surplus sale that had a 2-channel second RX.
Mike
At 11:43 AM 2/9/04 -0500, you wrote:
>s_alajeel wrote:
> > hi
> > I dont know if some one can tell me how i setup Motorola Pac/Rt
> > mobile repeater, VHF, Model H13TTY3110ASP29 to stand alone repeater
> >
>
>As others have said, generally speaking a PAC-RT is not duplexable,
>since it's just a handie-com MH-10 or MH-70 in a box.
>Now, there are some variations. I have heard of SP's (and the number you
>gave has an SP in it) that had 2 radios, not just one. The ones I have
>are UHF, with a VHF rx only monitor in it, and I can see making a
>portable input for out 2M repeater out it some day. I have also heard of
>the same thing with 2 UHF radios, again one as a monitor rx. That could
>probably be made into a UHF repeater for portable, low-profile use. It
>would not be aany good in any kind of high-RF environment because the rx
>has almost no front-end, and the tx has very little filtering.
>--
>Jim Barbour
>WD8CHL
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