vhf maratrac question

[gwilkinson]

I just acquired a vhf maratrac (T73XTA7TA7BK) which works fine except for one minor problem. The radio works just fine above 146 mhz (transmit) in that I can set the power level down to 65 watts and it is good. BUT, when I go below 146 mhz the power control circuit seems to quit as the radio immediately to to max power out (100 watts +). I thought the radio was A 144-174 Mhz radio or did I get some bad info? If it is a 144-174 radio do I have a problem with the power control circuitry or is it normal operation?

Gale

[Max-trac]

It's a 146-174 radio. That is normal. You can put a manual power control pot, look for the mods for the Maxtrac, the logic board is almost the same.

[gwilkinson]

Next question then. If I were to do the range mod mentioned for the cps to make it think the radio was low split would it make any difference (by doing a full retune per the board replacement menu option) or does it require the proper logic board too?

Gale

[kc7gr]

Alternatively, if you have the Software That Should Remain Nameless, you can blank and reinitialize the logic board to be 136-162, reprogram, and perform an alignment. That'll get your power levels under control with no hardware mods.

Happy tweaking.

[gwilkinson]

Now if could just find someone that could do the blanking of this logic board.....


Gale

[olepro1]

its been a long time since i fooled with a maratrac, i recall that we used to cloan another maratrac that had the correct freq range and it would stay that way. i don't have a code plug but someone else might. olepro