[78-L] Grooved video discs 78rpm resp. 1500rpm (''mechanical TV'')

[David Breneman]

--- On Thu, 10/11/12, Michael Biel <mbiel at mbiel.com> wrote:

> Interesting link to the Telefunken grooved disc.  I
> have a lot of the
> American RCA CED grooved discs and machines.  The
> machines are tough to keep adjusted.

The Telefunken system was different from the RCA system,
wasn't it?  If I remember correctly, the Telefunken
system used a "floppy" disk much like an Evatone
"Soundsheet".  I remember reading an article about it
before home VCRs hit the market.  It was a contemporary
of the holographic film system, which was also an RCA
project I believe.