Quote:
Originally Posted by bgadow
Man oh man, what a way to cap off an old Philco collection! Someday, if my woodworking skills ever allow it, I'm going to take an orphan prewar radio cabinet and build something like this.
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Back then the video standard was 441i 30Hz, today's NTSC is 525i 30Hz. You could replicate 441i by using the luma signal (from the S-video connector) from the Channel Master DTV receiver box set to letterbox mode, and taking a B&W CRT monitor that is too big by 20% for the bezel of the cabinet (so the dark areas are never seen) and/OR using a CRT of the correct size for the bezel but adjusting the vertical and horizontal scans to additional overscan by an extra 20% (so the dark letterbox areas are not seen). The active picture you will see is pretty close to being what 441i would have looked like.
The sound carrier back in 1939 was AM instead of today's FM (to the great joy ;-) of RCA's David Sarnoff, meant he would have to pay patent royalties to FM's inventor Edwin Armstrong, but he didn't...). To replicate that, limit the sound's high frequencies a little, and add a little noise by coupling thru a small cap to the B&W baseband luma video signal.