The Mostars originally used an EPSON "computer" as a programmer. The
program was on a tape drive. Very clunky. Later on the MIB programmer
was developed. I am sure you had to burn a code plug in any event.

The Mostars had a couple problems 1) The UHF ones had a problem with tin
"whiskers" growing inside the helical preselector casting which would
short out and detune the front end. It was impossible to repair this
part as it was permanently attached to the main board. 2) the 800 MHz
ones had a problem with thermal and mechanical expansion which affected
the VCO helical coil which was housed in the casting called the
"helical hotel" by the development engineer. This part you could solder
with special solder but it would soon again fail. The symptom was an
intermittent radio (no TX or RX). If you banged on it, it would start
working again for days.

Apart from these serious problems, the radios were quite an advancement
from the previous Maxar radios which used crystals and leaded
components. I believe the Mostars were the first Motorola radios to use
surface mount components and metric fastners.

SignalFerret wrote:

If recall Mostars had a PROM on the controller board. They're programmed
using a stand alone PROM programmer. As I recall it was a big suit case
looking monster.

May I ask, what frequency band is the Mostar, and more importantly, why
bother. It's a Mostar. Worst Motorola radio ever!

Robert N3LGC

"Gene Rodgers" wrote in message
news:4sVff.5408$BC2.1398@trnddc04...


I want to find a schematic for the Motorola Mostar Interface Box. I need a
MIB to program my Mostars.

Thanks,

Gene ke5bfa








--
Joe Leikhim K4SAT
"The RFI-EMI-GUY"

"Follow The Money"