Admiral model 24R12, Diagram
See the Yanks win the Y2K pennant, and then play the Mets in the Subway Series, on the Admiral set
Careful when you remove the chassis that you don't drop it and bust off the CRT's neck!
Dial from the TV we watched the first moonwalk on (Apollo 11).
vacuum tube sets, above,
and right is a Motorola hybrid
What the Westinghouse set would look like, showing Wilma and Fred Fliststone smoking Winston cigarettes.
A similar error happened to this weatherman,
who here looks like a Smurf. The chroma subcarrier from the camera looking at the weatherman
got flipped, to become 180° out of phase compared to the chroma subcarrier of the weather map
graphics. Like bananas, flesh tone color (which is close to being yellow) will look blue when the chroma subcarrier is 180°
out of phase.
Apex AD3201. This DVD player has a hidden menu.
Eject the tray, then press the numbers 8, 4, 2, then 1 on the remote. Dashes should appear on the screen for the first 3 numbers, then the hidden menu should then appear upon pressing the last number. Use the ^ and v keys on the remote to select "region" or "macrovision". Use "enter" to step thru which region you want (9 is "all" or "bypass") and if you want macrovision or not. Macrovision may make some vintage TVs or VCR channel modulators unhappy. To save the settings, close the disc tray. You can now use the "Y" video output to feed a B&W TV set via a VCR, as it will not have the color subcarrier and macrovision on it.
On a vintage color TV, they didn't have comb filters, but only "notch" 3.58MHz bandstop and bandpass
filters for chroma-luma separation. This assumed that anything above 3 MHz on the demodulated
composite video signal belonged to the chroma subcarrier. Problem is that any fine detail in the
luma ends up as crawling rainbow colors on the CRT. Later low end color TVs also did this.
But, if I have a source of S-video (separate luma and chroma, like on a better HDTV converter box or cable box), I can prefilter the luma (bandstop) and prefilter the chroma (bandpass) so no fine detail luma exists anymore, and thus won't become crawling rainbows on a vintage, or a later production notch filter TV set.
Frequency and group delay responses:
The values of the parts are not that critical. The resulting prefiltered composite video then feeds a TV modulator to send to your vintage color TV set.
Your set will present better looking pictures. Feeding a VCR with this prefiltered composite video, for recording, will make for better looking videotapes as well.
If I owned a TV station in the 60's and 70's (before comb filters were used in consumer TV sets) I would have done this prefiltering in the equipment that encodes the chroma and luma to become the composite video before it's transmitted. "Football games always look better on your station", fans might have said.
I used a combo composite and Svideo jack I salvaged out of a dead DVD player to build this filter on. The cap lead with the red sleeve here is the chroma.