Old TV set interfered with village’s DSL Internet each day for 18 months

SPC Michael Terrell Not familiar with that station but I got the rest of it. 9v P-P, wow! Lets get that horizontal frequency correct. It's 15,734.26 hz. I used to teach classes at the old Magnavox plant in Greeneville, Tennessee to train their line repair people. They always said it was 15,750 hz. When I corrected them they didn't believe it. Color frequency is really 3.58 Mhz. As you know it is really 3.579545 Mhz and the vertical sweep not actually 60 hz, but 59.94. That's why the head on the VCR has to spin at 1,798.2 Rpm exactly, (29.97 revolution per second) or the picture would roll. (Two heads = 59.94. I miss the days of servicing sometimes.

Cpl Vic Burk - Yes, but I rounded it for those with little or no interest in the details. Not only does the signal have to be correct, it hase to have the proper phasing to provide the proper tint. VITS made it a lot simpler. Especially for networked TV, divered by microwave relays since the video was modulated and demodulated at each microwave site.
15,750 Hz was the original horizontal frequency set by the NTSC for monochrome TV. It had to be shifted slightly to make the existing stand function with the additional Chroma information. A lot of match, to prevent a beat signal in the video, and done with vacuum tube circuits. 16mm film was produced at 24 frames per second, but had to be shown at 30 frames per second. That meant that sme frames were shown twice which required a specal film handling shutter. Displaying every fifth frame twice added the required six frames. Persistence of vision smoothed this so it wasn't noticeable. The film had to be pulled at a steady rate to read the optical sound track. Those old RCA TP66 Film Chain projectors were amazing.

SPC Michael Terrell - We talking Greek to people who don't know the language and specifications of how televisions work!