The GM300 is a repackaged and updated Maxtrac, and a GR-series
is two of them in a repeater housing. The Maxtrac / GM-series is
designed as a mobile radio ,and I'd take all the normal precautions
when running a mobile in high-duty-cycle usage. I believe that
there is a large heatsink that is available as a replacement part....
They also made some 2w Maxtracs that will do continuous duty,
and in link service with a beam antenna that may be enough (or
tack on an external amplifier) - look for a D04MJA on eBay.
The zero is used to mean "under 3w or RX only".
See www.repeater-builder.com on the Moto page under
"Figuring out what you have"
Mike WA6ILQ
At 07:02 AM 9/20/04, you wrote:
>Greetings,
>
>Does anyone have any experience using the Motorola GM300 radios as
>crossband link transceivers? I have successfully reprogrammed the
>UHF transceiver for 434 MHz. use. All appears to work well. I
>understand that I can mate this to a VHF version (reprogrammed for
>our 2 meter input frequency) and the two will successfully
>crossband. I realize I have to make up the cable to connect them.
>I'm looking for feedback from someone who has done this. Pros?
>Cons? Suggestions? I see there is a squelch modification that is
>recommended which I will do. Anyone have a scanned service manual?
>I have the schematic but would like a board shot so I can identify
>specific parts from the schematic.
>
>Any recomendations will be welcome.
>
>73,
>
>Scott Madison, WN1B
>
>
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>
>Yahoo! Groups Links
>
>
>
>
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