part number's p9121-a tu281 slq tlcg010a

tag on the unit reads model b42 aab 1100b trans type cc005 ser no fv703u
i bought the whole unit for parts ,now trying to see what is what

thanks

Looks like an old Motorola FM commercial radio pair. The receiver a "Sensicon." That
looks to be a VHF low-band setup. Those strips were used in mobiles and in base stations.
Judging by the rack adapters those came out of a base station.

Those aren't the correct model numbers; when you find them the exact specs for those
strips can be determined.

Pete

thanks and yes it was out out of a base station from a bread co..
again thanks

Presuming you copied the numbers correctly it's a 70 MHz link control station. As Peter says, the receiver is a Sensicon A and the transmitter is a 60 Watt "A" series which uses an 829B in the PA.

Because of the unusual band split and the fact that they are stripped of tubes and crystals, I don't think they are useful for much. It won't pull to the 6 Meter ham band and this model has the "Permakay filter delete" panel which means the bandwidth of the receiver IF is the proverbial "barn door."

I have a power supply of the same vintage. Maybe for this unit. The number is P-8464. Does anyone have any info on this supply, I was thinking about using this for a older tube type ham rig....Thanks
Lynn
kb5by

Yeah... P8464 is the standard 60 Watt power supply and built like the the proverbial brick outhouse.

It has enough filament capability to run just about anything and you have some standard B+ outputs available in the 350 and 750 Volt range. I don't remember exactly. There may be a schematic on the Repeater-Builder site. The good news is that they are really common and data is easy to come by.

Thanks for the info..I have not been able to find anything so far but will look on that site...Thanks,
Lynn kb5by

That's the front end known as the "seven piper". Nice tight front end but as stated, with the "Permakay" gone it's almost useless for voice communications.

The receiver has the crystal oven (gold plated box). See what frequency is stamped on the label.

829B?

That doesnt look that old and Ive expected a 5894 but Im far from expert on anything FM.

Carl

That type of strips were available new until IIRC the mid 70s when the transistorized stuff started to come out. Some are still in service.

I'm pretty sure that I was still repairing the MTS Base Station version of those for the Rural Bell Offices in the mid-late 80's prior to cellular taking over. Parts were still readily avialable then. Of course it took a whle for cellular, or even IMTS, to appear in parts of Tennessee.

Garret

I didn't see the PL deck on those, nor the "turkey gobble" reeds. I doubt that they are IMTS. Besides, IIRC IMTS was on the 450-454 band.

I bought an old '78 Dodge back around '90 or so and it came with an IMTS [green box] set .

I'd occasionally use it by calling the operator with "radio service testing... can you test call xxx-xxxx for me?..."

I wasn't saying those were MTS or IMTS units, as I don't think that is very likely, expecially with no IF filter. I was just referring to the service life of that general Motorola design - they were out there a very long time. As I recall, the low band versions were all MTS, they never made an IMTS low-band base station. That's just what I recall, it's been a long time. Strange, but I can still remember sitting in solitude, in the snow, in front of an outdoor cabinet repairing one. It was somewhere in the mountains of Tennessee, near Bristol I think. I miss those nice days.

Garret

Noted, Some of the late IMTS stuff was hybrid with solid state receivers and tube finals.

I can relate to sitting on a mountain top fixing these things! Most all the ham repeaters in So California are on mountain tops and our problem isn't so much the snow as the wind.... one of my friends was inside the "bunker" on Oat Mountain when the wind blew the steel door shut and he couldn't apply enough leverage to open it again. He was trapped there until he was able to summon someone to come up the hill to help him. The guy that came up was in a van and he positioned it so it blocked the wind and then helped open the door.... this last week we had 40-50 mile an hour winds in The Valley floor. -- much higher up in the hills.