[GreenKeys] Telephoto machines?

[Chris Elmquist]

Bob Pease wrote about it in 1994,

What's All This Teledeltos Stuff, Anyway?

http://electronicdesign.com/analog/whats-all-teledeltos-stuff-anyway

and looks like there is a seller in the UK still offering it,

http://www.betterequipped.co.uk/teledeltos-conductive-paper-prd1516-pack-of-10-sheetsp-1262

Interesting stuff and discussion.

Chris NØJCF

On Tuesday (06/30/2015 at 01:10PM -0400), Lester Veenstra wrote:
> And also use in the SONOGRAPH, a device well known to CTTs and CTMs.
> 
> 
> Lester B Veenstra  MØYCM K1YCM W8YCM
> lester at veenstras.com
> 
> > -- Chris Elmquist N?JCF
> 
>     No, it was called Teledeltos paper.   It's a simple resistive
> coating (carbon plus copper thiocyanate in the final version)
> which is burned off by power from the writing stylus.  It's
> not electrostatic; that puts something onto the paper. This takes it
> off.
> 
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-- 
Chris Elmquist