Hat tip to @mathew - I just learned that France had a graeter than 720i broadcast standard in the 1940s!

That's Astounding.

I gotta find some old french gear, I guess.

HD broadcasting in 1948!

earlytelevision.org/grammont.h

The sets were 4:3 of course, but basically they were 4:3 720i black and white.

(in practice it was actually more like 816×736 px vs 720's 960×720, but also it was analog so the minor differences were probably lost anyway.)

The standard was used in to the 80s, but I'm having a really hard time finding any information about it.

If you're french, and you know what this was called in france, please let me know!

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Here's a thread where some folks are driving 819 line sets from a VGA cable: vintage-radio.net/forum/showth

and from a converter box that doesn't appear to be sold anymore.

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The big takeaway from the blog post is that I need a Teleavia P111, and that I need to rig up a board that converts 720P HDMI to the ~730i RF signal that this thing would be expecting.

And a power supply.

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Followup on yesterdays ramblings about a 70+ year old french High Definition TV standard:

I found a Teleavia P111 for sale, submitted an offer for 1/4 of the listing price, and the offer was accepted.

In a few weeks, I'll have a mid-century french HD TV to start experimenting with.

I guess it's time to join an old TV forum and actually read my "Handbook of Television Repair" from 1952.

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Here are some pictures and illustrations of various versions of this TV.

I'm *really* pumped about it.

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@ajroach42 This TV is gorgeous and I would like to be its friend.

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A bunch of technomancers in the fediverse. Keep it fairly clean please. This arcology is for all who wash up upon it's digital shore.