just remember, you can't tell if the channel is empty until you key up and break the silence.
These days i think a lot of us turn on the radio while we are doing something else, like browsing a forum...
used to be it was only the TV that got in the way, and you were either watching TV in another room or on your radio and that was it.
(having the TV in the radio room tended to be a problem for many LOL)
i have to use a foot pedal if i actually want to talk as my hands are usually busy soldering etc. it never fails that as soon as you start desoldering the pins of an IC, someone calls you on the radio.
LC