Prior to that, there was equipment using channels that were between some of the channels on the old 23 channel Citizens' Band. That was far worse. C.B. operators running splatter-prone illegal amplifiers were bad enough, but people discovered these apparently "empty" channels (sometimes called 3A 7A 11A 15A 19A 22A and 22B) and modified their radios to use them. Eventually the F.C.C. gave up on those channels being viable for things like garage doors and R.C. model airplanes, and they became part of 40 channel C.B.
I think some of that remote control equipment shared 72 to 76 Mhz for a while. That's a gap, 2/3 the size of a t.v. channel between channels 4 and 5.
I'm wondering if the F.C.C. will take away t.v. channels 2 through 6. Almost everywhere, the stations formerly on those went to U.H.F. with the digital transition. I guess they figure that few people want to buy really big antennas for the lowest frequencies. (UHF and 7-13 use much shorter antenna elements). Anyway, those channels have the best coverage potential of all of them, but they're hardly used now. (see tvfool.com or the FCC database)
I think some of that remote control equipment shared 72 to 76 Mhz for a while. That's a gap, 2/3 the size of a t.v. channel between channels 4 and 5.
I'm wondering if the F.C.C. will take away t.v. channels 2 through 6. Almost everywhere, the stations formerly on those went to U.H.F. with the digital transition. I guess they figure that few people want to buy really big antennas for the lowest frequencies. (UHF and 7-13 use much shorter antenna elements). Anyway, those channels have the best coverage potential of all of them, but they're hardly used now. (see tvfool.com or the FCC database)
http://www.fcc.gov/mb/video/tvq.html