[GreenKeys] Teletype DRPE tuned reed mechanism

[Eric Moore]

Thank you everyone for the responses!

The DRPE was capable of reaching 240 CPS, which is really incredible. The
BRPE topped out at 110 it appears.

I received a BRPE yesterday that seems to be fully working. I ordered an
appropriate parallel connector from digikey so I can drive it from a
microcontroller and will make a video of it in operation at some point
hopefully soon.

-Eric


On Fri, Dec 18, 2020, 11:47 AM Jim Haynes <jhhaynes at earthlink.net> wrote:

> On Fri, 18 Dec 2020, Keith Lueck wrote:
>
> > I'm curious as to the market for this...  Feeding this beast would've
> taken
> > something electronic, not electromechanical....  Maybe high-speed
>
> First used, I believe, in FAA system called BDIS.  There was ADIS, an
> acronym for Automatic Data Interchange System, which was for weather
> data, which FAA calls Service A.  So BDIS was for Service B, which is
> flight plans and other kinds of directed messages, and is a sort of
> pun on ADIS.
>
> Second use in a 750 wpm tape-to-tape system, Dataspeed Type V.  I suspect
> very few of the receivers were sold, as the main use of this system was
> for data collection where the transmitter was at an out office location
> and a computer connected direct to the modem at the receive location.
>
> Another use was in Long Lines Project 176  high speed system for the
> government.  I think it was here that the eddy current problem cropped
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