[time-nuts] TV Signals as a frequency reference

[Martin VE3OAT]

I grew up in the 50s and 60s watching the lines at the top of the TV 
screen change in black and white segments according to their coded 
information.  My Dad had adjusted our set so he could see those lines. 
  (He was a field service specialist for Canadian General Electric.)

I think the network timing information was in "line 6", though I might 
not remember accurately.  There was all kinds of other information in 
those lines at the top, although only technical people knew about it 
because most TV sets were adjusted so you couldn't see them.

73,
... Martin   VE3OAT