Zenith Phonevision: Let's explore this

[old_tv_nut]

Should have known earlytelevision.org would have something:
http://www.earlytelevision.org/phonevision.html

Edit: I believe the picture of the scrambled image is a time exposure and doesn't properly show the jittery venetian blind effect. I think it's a multiple exposure of direct and delayed strips superimposed, which just looks like a bad ghost.

Also see:
http://chicagotelevision.com/pay.htm