Mallory tech book on TV in 1942

[wa2ise]

Found a book, copyright 1942, with a couple of chapters on this new thing called television. Then WWII happened. As most of us know, TV was going to be 441 lines interlaced with a frame rate of 30Hz and field rate 60Hz. Channel width 6MHz, and sound carrier 4.5MHz above the picture carrier. Vestigial lower sideband, picture carrier 1 1/4 MHz above the bottom of the channel. Just like NTSC except the number of scan lines, and the sound carrier was going to be AM, not FM. If you thought picture buzz on NTSC's FM sound was bad, AM should have sounded worse.

The FCC allocated channels TV channels from 44 to 108 MHz, with a few gaps for other services. And a tentative allocation of 12 channels up from 156 to 294MHz. Another chapter of this book, on FM radio, mentions the FM band then was 42-50MHz...

And a few pictures of TV sets from then. 2 RCA's, a Philco, and a Fermseh.