So I bought a stack of Maxtrac's at my local junk show.
Posted: Sat Jul 29, 2017 8:04 pm
Ham operator here-Looking for conversion information. Mostly I want to convert the few working VHF-Low band radios I have to 6 meters. One for my work truck, and one for the garage. I have the information on how to do the conversion, but now I'm trying to find other information-Like I have seen where the 2-channel radios (most of what I have) get converted to 16 or 32 channels, and the "Hydro" conversion radios with 99 channels.
I also have a VHF highband that *appears* to be correct for the 2 meter ham conversion and one more that's suitable for the conversion to 440Mhz band, but they don't have labels on them that say "This works"...no labels at all, actually. Had to pull the covers to get the PA board part numbers to figure out what they are.
Anyway, I have two radios marked "Good TX/RX, No Issues", and they are Model Number D51MJA93A5AK. From what I can find, that means:
D Dash Mount
5 60W PA (0=recieve only, 2=2watt, 3=25W, 4=45W, 5=60W)
1 VHF Low-Band, 30-50MHz (2=72-76Mhz, 3=136-174Mhz, 4=403-512Mhz, 5=800Mhz, 7=900Mhz)
M MJA Maxtrac 50 conventional non-trunking
J "
A "
9 Mode
3 2-channel (7=six channel, D=16 channel, J=32channel)
A ??
5 ??
A Revision 1
K Standard complete accessory and installation kit
The RF board is marked 84D80904 V03, and has a sticker marked HLB-3050A MAL9817 on it.
The Logic board is a 5-pin board, 84D80199M02, and both radios have Xicor EEPROM's fitted instead of the older battery-backed RAM, and the EPROM has a sticker marked "1990 Motorola version 5.34 HLN5569A"
The sticker on the board reads "HLN5172A MAL9816"
Anyone here have any more information for me?
I also have a VHF highband that *appears* to be correct for the 2 meter ham conversion and one more that's suitable for the conversion to 440Mhz band, but they don't have labels on them that say "This works"...no labels at all, actually. Had to pull the covers to get the PA board part numbers to figure out what they are.
Anyway, I have two radios marked "Good TX/RX, No Issues", and they are Model Number D51MJA93A5AK. From what I can find, that means:
D Dash Mount
5 60W PA (0=recieve only, 2=2watt, 3=25W, 4=45W, 5=60W)
1 VHF Low-Band, 30-50MHz (2=72-76Mhz, 3=136-174Mhz, 4=403-512Mhz, 5=800Mhz, 7=900Mhz)
M MJA Maxtrac 50 conventional non-trunking
J "
A "
9 Mode
3 2-channel (7=six channel, D=16 channel, J=32channel)
A ??
5 ??
A Revision 1
K Standard complete accessory and installation kit
The RF board is marked 84D80904 V03, and has a sticker marked HLB-3050A MAL9817 on it.
The Logic board is a 5-pin board, 84D80199M02, and both radios have Xicor EEPROM's fitted instead of the older battery-backed RAM, and the EPROM has a sticker marked "1990 Motorola version 5.34 HLN5569A"
The sticker on the board reads "HLN5172A MAL9816"
Anyone here have any more information for me?