Great to see someone describe the Pulsar well. They came into the SF Motorola Service Station well through the 80's. I don't remember ever having to really repair one other than small stupid user things and some control reprogramming.
Built like a fort with a pretty neat internal duplexer hams used to get fooled & excited about using it for amateur repeater work. No cigar big boy... I used to say they were a hybrid style of Mocom 70 just because they looked a bit like a Mocom 70 and had the same quality of construction. The Mocom 70 and the Pulsar are probably of the same design generation or "familiy". To make you cry I'll say I can't remember how many of the Pulsars we trashed when Motorola Recon wouldn't even pay the freight fees to "Recon" (where they would crush them) upon customer trade in. Speaking of IMTS Radios... we also saw and serviced a number of Harris phones, which made very easy repeater conversions. The Harris UHF units had a really nice internal duplexer... call it a flat pack but it was more a mini cigar box size and it works great for Amateur Aps. A rush of memories flood back to those days. I can actually remember a few RCA, GE, Harris, Aerotron IMTS phones... oh boy, what joy. The phones were an easy service ticket... the #$*& taxi cabs right behind them were the stinky cluster of the morning.. a whole line of them out the door. All the drivers with great attitudes. cheers, s. > "nj902" <[EMAIL PROTECTED]> wrote: > > The Pulsar mobile phone is not a 1969 product, they were produced > from the late 1970's through the 1980's. > > These drawer units make good raw materials for building repeaters. > They can be had for next to nothing or even for free, so you can > build a complete repeater for lunch money. Much of the circuitry > is of the same vintage as Micor. The PA's are continuous duty - > after all, a duplex phone transmitter is active for the duration > of a phone call - no PTT. > > Also, these are synthesized radios- but the nifty thing is that > there is no microprocessor - the synthesizer loop is programmed > with a diode matrix. Once you master the logic - you can move > it to other frequencies - and without spending a dime to have > channel elements re-rocked. [these units actually do have a > microprocessor for the supervisory logic - but we remove that > for amateur repeater applications] > > They do have a fixed offset from TX to RX. Since that offset is > 5 MHz at UHF, those can be a full duplex link or repeater in one > box. For VHF, it would be easier to use two drawers since there > is only one VCO. Also, there is no squelch circuit so you will > need an audio or squelch gate board from a Micor or a squelch > circuit like the one from Link. > > Finding a manual is necessary for a successful project. > > The drawer unit will have a model number such as T1739 or T1839 > [A,B,C,D, etc.] This will help tell what band the unit is and what > book to look for. You can also open it and look for assembly > numbers that begin with TLD or TLE to determine the band. >
