MAXAR 50
This radio is not software programmable. The PL tone can be changed as per the instructons on the manual.
The pinout of the mic connector is:
1------Spkr hi 2------PTT 3------mic audio 4------gnd 5------mic gnd 6------PL disable (shorted to gnd enables PL)
HT440/HT90
The HT-440 is nothing more than an HT-90 in a fancy case. It is strictly a crystal type radio and therefore not programmable (even the PL or DPL boards take physical "reeds"). It is, however, a good radio and will generally exceed rated wattage by about 40%. They will go pretty far out of band just by putting in the right xtals + realigning.
Being a rock radio, 1 pair of crystals (Rx and Tx) are needed for each channel. The radio is fitted with either a 2 pole c/o switch for the 2 ch. model or a 4 pole 4 pos. rotary for the 4 ch. version. It is to all intents and purposes an HT 90 radio ( same circuit board) but a darker coloured case. The same batteries fit but look odd because of the different colours. This radio exhibited very few vices in service, the 2nd local osc. crystal would give up occasionally and the P.L. element would fall out of its socket on the piggyback tone board. The on/off switch contacts can go high resistance causing some funny symptoms but usually a quick burnish with a relay contact or automotive type points file would sort them out. The battery contacts between the case and the circuit board need to be kept clean ( they are tightened by the two screws through the top plate ).
MOXY
The pinout of the power connector is below, a picture can be found here.
A------12v + B------gnd (12v -) 1------hang up box 2------hang up box gnd 3------horn out (for horn blower decoder) 4------N/C 5------mic hi 6------N/C 7------switched A+ 8------PTT 9------int Spkr 10-----meter point 1 11-----meter point 5 12-----RX audio 13-----meter point 2 14-----meter point 3 15-----meter point 7
The meter points are for an adapter cable to use with a Motorola test set.
MAXAR/MOXY 6M Conversion
We've been told that there is a book available for putting the low band Moxy or Maxar onto 6 Meters.� It is by William I. Oglivie (VE7MIT) and is available from Zen-In Design, P.O. Box 390700, Mountain View, Ca.� 94039.�
MT500
If you need channel elements for these radios, check out this site http://users.leading.net/~radiotr/MT500.
