1949 Motorola 5A9M - Printable Version
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RE: 1949 Motorola 5A9M - Arran - 06-13-2025
Vlad;
You may have noticed that Motorola greatly simplified the chassis, and cabinet layout on the model you bought. They went with a more conventional layout with all of the batteries stored below the chassis, and all of the electronics in the chassis, rather then congregated all around the main chassis. One drawback might be the silver mica caps in the IF cans, by then Motorola was using the 3/4'' square Automatic style IF transformers I think rather then the round ones. One thing I will say about every Motorola radio I have had, they usually performed well once restored, and they though of things like disconnecting antennas, and speakers, for servicing.
Regards
Arran
RE: 1949 Motorola 5A9M - klondike98 - 06-13-2025
Thx Vlad.
RE: 1949 Motorola 5A9M - Vlad95 - 06-13-2025
Arron,
Yes, I can see the differences in the interior design, but if you compare the schematics, they look very similar. They are also very similar externally.
RE: 1949 Motorola 5A9M - Arran - 06-13-2025
Vlad;
Yes it's very similar, Motorola obviously wanted to get the most use they could out of the dyes used to stamp out the steel cabinets, all they had to do was put a new front panel, and door on to disguise it. I guess you could say that the chassis was a refinement of the 1948 model, electrically they would be very similar, pretty much all "three way" portables from that era are, some would have a tuned RF stage, others not. I think that the largest change was that many started using a 3V4 audio output tube, which gave better performance then the 3S5. There is a green version of your set out there as well, I will have to see if I can find one.
Regards
Arran