First look at the repeater-builder.com website under Motorola, then Maxtrac.
There is a manual power control mod that is worth looking at. In many
cases the power control routines lose control on out-of-range frequencies,
and run the radio wide open. This behavior is most commonly seen on
UHF and on 900mhz.
Secondly, I've looked at the possibility of modding a UHF 406-420 Maxtrac
down to any level that would allow continuous duty and I lost interest ...
it's easier to find a D04 or D03 series Maxtrac on ebay or elsewhere, and
either use the 25w as a base or as a mobile.
Look at a Mitrek. The mod there is simpler. In my "Interfacing" article
on the Mitrek page I show a high band mobile extender and how Moto
mounted a separate TX antenna jack.
In the photo it also shows how they bypassed the final stage (with
a piece of wire jumpering the base to the collector pads on the PC board).
Mike WA6ILQ
At 02:47 AM 5/25/05, you wrote:
>Anyone know if it's possible to mod a 25w UHF Maxtrac PA to the 2w version?
>Can the final be removed/bypassed so just the driver is being used?
>
>I'd like to use it for a link but the darn thing folds back the power output
>after about a minute of TX no matter where I set the power level at in the
>RSS.
>
>Thanks,
>Steve, kf6fkk
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>Yahoo! Groups Links
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