[I may of course also be missing a second
clue, which would be knowledge of what third, fourth,
etc. clues I'm also missing. But I know I'm missing
at least one clue.]
I'm fairly certain
that I want one of these:
![I hope I translatedthis correctly. [circuit diagram for a passiveanalog ring modulator]](https://p.dreamwidth.org/160847c9c2f1/109641-1428036/www.kempt.net/~glenn/lj/ringmod.png)
but I've no idea what
size transformers to use. (I'm going to plug musical
instruments and/or microphones into it, so the big
hint for anyone who might be able to guess what
transformers go there is: it's an audio-frequency
circuit. Uh, and I think guitars, guitar amps, and
stomp boxes are hi-Z, right? I expect to need an
impedance matching transformer or a pre-amp if I send
a microphone signal into it.)
Apparently, this is also a Dalek component,
though I don't know whether that'd be this circuit or
a digital version of it.
I also want a 'talk box' someday, but this looks
waaay cheaper to build and would be fun too.