"industrial" PDP-11

Bill Gunshannon bill.gunshannon at hotmail.com
Sat May 18 12:22:59 CDT 2019

On 5/18/19 8:56 AM, Noel Chiappa via cctalk wrote:
>      From: Paul Anderson
>      > They did make the RT100, RT340, etc. which were rugidized versions or
>      > the VTs.
> We also ran into a VT52 (I think, although possibly it was a VT100) which
> apparently had been TEMPEST secured; the inside of the casing had been
> coated with a metallic film. (Or perhaps it was built to operate in
> an environment with a high E-M radiation level, and kept stuff out, not
> in.) I don't recall anything else about it now, alas - it's been almost
> 40 years!

Hmmmm...  Every VT100 I ever saw the inside of (not a lot, but a
bunch) had the EMI coating on the inside.  I always assumed it was
to meet FCC spurious emissions requirements.  Definitely not enough
to meet TEMPEST requirements.


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