Originally Posted by Zeppelinium
Thanks for the research. I am now totally confused. Either I didn't look very closely or mine is "different", but I don't see the 12V
going to the "amp." On mine it looks like the cigarette lighter wires are completely separate from what I think is merely a balun matching transformer.
I agree that it is a balun. I have attached a photo of the powered amplifier in my Excella that I replaced the 2 in series that were in it. Note the 120-volt cord coming out the bottom. The old units combined had less signal boost than this one alone. They were in plastic cases that looked like the early 60s. I think one or both were Radio Shack. One had ins and outs for both 75 and 300 ohms.
I have an almost identical, lower powered, GE unit in the ’67 Trade Wind, but it is in a chrome box. I put it in back in the late 80s when I got the AS, and it still works well. These amps work very will and do not degrade the original signal when not powered. I got both the old and new ones at Wal-Mart.