Joel Rubin wrote:
I've seen these on UHF but never on VHF. I saw color bars and heard a
tone Monday evening.

They've been legal on VHF for decades. However, they haven't been legal
on channels adjacent to local full-power stations until very recently.
Since every other channel is already in use in NYC by full-power
stations that pretty much made VHF off-limits for LPs there until recently.

We had one on channel 5 in Madison, Wis. back in the early 1980s, and
that was by no means the first.
--
Doug Smith W9WI
Pleasant View (Nashville), TN EM66
http://www.w9wi.com