Hi Hal, Yes I remember them. Two versions existed, one used for common view with line 10 and the other one used the color burst frequency which was lock to a Rb source at the network. It was only good when a networked program was being aired. Both are referred to in the links I provided. I have, somewhere, the actual paper article about the second one with schematics, etc..
Bill....WB6BNQ Hal Murray wrote: > > Here are 3 Hewlett Packard appnotes that are in the same vain as the > > NBS 140 booklet. In many ways these HP items are better written. The > > first one was written in 1961. The second one is an update (1974), as > > is the third (1976). Each are different and equally worth having on > > the shelf. > > Speaking of neat old publications... > > It was probably in the late 70s that a friend showed me a small booklet from > NBS. > > It was describing how to use TV signals to calibrate your local clock. I > think NBC and HP cooperated. > > I think the story was that NBC had their whole network of TV stations locked > to a master clock. It was very stable except for jumps when the phone > company rewired some link. I think they used to measure various sites > monthly and publish the differences between local tick and correct time. > > Does anybody remember that one? > > -- > These are my opinions, not necessarily my employer's. I hate spam. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.