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I never got in trouble, but I had a couple of friends who did. They ran a store called "Azotic Industries".
AFC and AGC would have been nice upgrades-I never knew they were available. There were two box versions that I knew-the first was built into a speaker and had local audio, later there was one with audio re-modulated onto channel 3. There was also a simple mod to install in TV sets internally. It used a J.W. Miller #6333 coil and maybe a cap, to unscramble the picture, and a circuit with an LM565 PLL chip and a transistor for the sound, that you installed on the sound detector output. It was this circuit that was basically the same as the stereo sound subcarrier demodulator, and it also worked on Spectravision audio if I remember right. "Keyed AGC" was always the limitation for this and all the other video-based descramblers.
I never actually hacked one of the "real" ONTV boxes.
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