There were two FCC agents, and two Chicago police officers.
One of the agents was a white man, about 60-ish, who we remembered as looking like Burl Ives.
The other agent was black, maybe 50-ish with hair going a bit gray.
I never got their names that evening, I was in that "special condition" that one gets when the FCC arrives unexpectedly.
Their demeanor changed quickly once let in and they saw I had not just put any old ham gear on the air.
They immediately notched down their attitude to more relaxed.
"Where did you learn to do this?" was one comment.
"I don't think I'll be able to get a frequency reading or power measurement off this," was another.
And.."How do you get it to do FM?"
With any commercial gear it would have been easy to determine these things..
Then they asked, "Which part is the transmitter?" It was all spread out on a long teak coffee table, Bogen 100w audio amp,
250w RCA mod xformer, ring stand 1930's microphone, 1920's candlestick carbon mike, mixer and the transmitter proper.
It was a 6 tube open-breadboard transmitter that looked straight out of 1933 with link-coupled stages, hand wound coils,
the output was a pair of 6L6s at 750v that would barely behave in class C, but ran dull orange and gave 95 watts out.
I was in a two flat where the landlord OK'd my roof antenna experiments, the length of the building was perfect for a 40 dipole.
I used a low-pass filter, and was pretty clean. I had perfected a slight coupling of audio back into the osc, so I was AM and
narrow band FM. It sounded good in AM, but REALLY good in NBFM.
I would have to turn it off if my upstairs neighbor wanted to watch TV, etc. We were on very good terms, and she didn't mind as long
as I was accomodating and would shut down for her. But I'm sure it must have gotten into phone lines and other people's electronics.
100 watts is too much power for AM in a dense city neighborhood. Glad I have few airchecks somewhere.
I disassembled the xmitter soon after to lessen the temptation. I kept the output air-wound tank coil, which hangs from a hook
in the basement above the audio/radio part 15 "control room" console. I now look at it and it brings back memories.
When I went to work for Harris Graphics (web presses), which had been split off Harris, I considered staying a year or two, then applying to Harris RF.
Kinda glad now I didn't. I stayed in printing, and it has been good to me.