1920'S Jenkins Radiovisor on eBay

[EdKozk2]

Thanks for posting the link Decojoe,
This is the first picture of a Jenkins Drum scanner I've seen.
Ed
After taking a closer look at the photographs, the radiovisor looks to be
a standard scanning disk.

[rld-tv01]

I find it interesting the first apple computer would sell for $800K in 2016 while early mechanical televisions sell in the $3K-$15K range. I saw Western Television Model 41 listed for $15K and I believe the buyer offer was close to that. I believe a Jenkins model 100 was sold in the $7K-9K range about 10 years ago. The Jenkins model 100 was never offered with a cabinet which I think diminishes today's achievable price. A Western television Visionette was in the $6-$7K range 10 years ago.

[MIPS]

Originally Posted by rld-tv01

I find it interesting the first apple computer would sell for $800K in 2016 while early mechanical televisions sell in the $3K-$15K range.

As someone who works in the old computers hobby, when it comes to Apple products there is a term called the Reality Distortion Field.
To them the Apple I is this magical PCB with a bunch of IC's that was created by a mythical man (implying Woz was somehow not at all responsible for the fact he did design, prototype and test build the computer) who created the GUI and the biggest computer company in the world and this is a national treasure symbolizing the humble beginning of a technological world leader and the few remaining original units are priceless.
These things...uh...they look like some retro steampunk thing. Wasn't that in an episode of Doctor Who?
It's an Each to their Own thing. The international acceptence is that they are just stupid.

I could see it sell for $38K if it was professionally restored. It has the ability to become a really nice and extremely rare museum piece. Right now however I really could not see it going over $10000.

* Italics denote actual RDF

[rld-tv01]

Originally Posted by EdKozk2

Thanks for posting the link Decojoe,
This is the first picture of a Jenkins Drum scanner I've seen.
Ed
After taking a closer look at the photographs, the radiovisor looks to be
a standard scanning disk using a mirror to reflect the image into a magnifier.
Same idea as my Stewart Warner 9100 mirror set.

I think listing pictures 4 and 5 show a scanning drum. The tag shows model 202 which is listed on ETF web site as a scanning drum TV set. The ETF web site also show a Jenkins model 302 with a scanning disk.
http://www.earlytelevision.org/jenkins_302.html

[EdKozk2]

RTD-TV01,
Your right about the drum scanner. I thought the can was a heat shield with cooling because of the hole spaced around the can. So I,m guessing the rotating can sets the frame rate and the rotating disk sets the lines per frame rate. I'm not sure why I thought it used a mirror?
Ed

[old_coot88]

Originally Posted by EdKozk2

RTD-TV01,
Your right about the drum scanner. I thought the can was a heat shield with cooling because of the hole spaced around the can. So I,m guessing the rotating can sets the frame rate and the rotating disk sets the lines per frame rate. I'm not sure why I thought it used a mirror?
Ed

I dunno, it looks more like the drum sets the H rate, and the spiral cuts in the disc set the V rate. The drum and disc are locked together arithmetically by the gearing, and the camera would need to have an identical mechanism. It wouldn't be compatible with any other scanning format. Seems like, anyhow.

Wonder if this format originally used a flying-spot scanner rather than a "camera".