From Repair Mobile
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MOBILE TRANSMITTERS:
The first Motorola AM mobile transmitter was the T-69-20A. If there was a non-"A" model, it must have been a prototype. This appears to have been Motorola's only AM mobile transmitter, and is a two piece set in which the power supply and modulator are in one case and the RF section in a second. More details - thanks to mbay.net
