Originally Posted by Jim & Susan
Hey Zep, I forgot to post this for you. Here's that little Braund Amp I mentioned before. I've got a few more pic's someplace if you need 'em.
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'd be pretty amazed if there were any active components on that board. I'm thinking mid-1970s, a world where UHF channels were starting to be common but many TVs still had to use a set-top converter. I guess those little boxes were solid-state, even though only a few years before you could't do even 144 mHz with a transistor, you had to use a tiny tube called a Nuvistor, which required B+, grid bias voltage, and filament supply. As you can surmise, I'm still skeptical.
Do you actually see transistors and resistors on your amplifier? And maybe a capacitor or two? Without these components, it can't be an active device.