Pedant alert: English Majors would suggest "Plug In That Trad Instrument" and you won't end your sentence with a preposition. :)

I have a whole variety of mics here that my father used, but I don't know if he used them exclusively for recording (he had a lot of cassette recorders over the years for recording sessions) or for transmitting his guitar. Maybe he never did that. I suppose there is a way to tell by the type of mic how it is used? One of these days I should do something with all of this stuff.

SRS