The BBB is a unique situation. Moto used that suffix on three different radios.
One was a all-tube base from the 50's/60s, The later was a 70s/80s design that was based on the Mocom-70 mobile radio. The third was a handheld marketed as the MT-500. Can you post an interior photo? A 2135 key will open either of the base stations. More details at <http://www.repeater-builder.com/motorola/motorola-suffixes.html> But all of the BBBs were crystal controlled. The tube base had plug-in crystals, the Mocom 70 based radio used channel elements (packaged oscillators with the crystals inside) as did the handheld. If you can't find someone with crystals or elements on your frequencies you are looking at having to order crystals. But to break it down, L43BBB3190DM L=tabletop base 4=RF power level, 30-40 watts 3=136-174 MHz, but in three bandsplits: 136-150, 150-162, 162-174. See below. BB = Model suffix. B=Base station 3=PL option 1=narrowband (5KHz) 90=4 frequency option D=hardware revision level M=shipping option As to what split, look for a TRD or TTD followed by 4 digits, or maybe four digits and one or two letters stamped on the chassis somewhere. Optionally follow the receive coax and if it plugs into a front end module look for a three-letter and 4-digit number with a letter or two at the end (like TLN4321A) but it may not be the specific letters TLN. Let us know what the TRD, TTD, or front end part number is. Mike WA6ILQ At 09:13 AM 08/27/09, you wrote: >Hi, > >I have inherited a tabletop Motorola that has ben modified into a >repeater. It has worked for years but now has quit. >It is a L43BBB3190DM. What is that? >It will not transmit when the PTT on the rear terminal strip is grounded. >Where can I find a schematic or any info like the GE LBIs? > >Thanks, > >John > >-- >John Mc Hugh, K4AG >Coordinator for Amateur Radio >National Hurricane Center, WX4NHC >Home page:- http://www.wx4nhc.org > > > > >------------------------------------ > > > >Yahoo! Groups Links > > >
