[GreenKeys] Mystery RTTY Project

[Skip Macaulay]

Wild project, real bread " board" stuff !!
Skip

Skip MacAulay
VE6BGT

On Sat, Jul 8, 2023, 4:20 PM B. Smith, <smithab11 at comcast.net> wrote:

> Several have figured out the project. The RY's are generated by sending
> a square wave using a 555. The 555 then drives an HSR series optical
> switch which keys the local loop. Dovetron does a similar operation with
> their RY generator. There are plenty of Chink 555 boards on ePay that
> are all ready built and cost is around 2 bucks.
> Photo Attached.
> K4CHE
> http://k4che.com/Tempvideo/RTTY%20Mystery%20Project/Mystery%20K4CHE.mp4
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys at mailman.qth.net
>
> >>> Jordan Spencer Cunningham's GreenKeys Search Tool:
> https://teletype.net/gksearch
> >>> 2002-to-present greenkeys archive:
> http://mailman.qth.net/pipermail/greenkeys/
> >>> 1998-to-2001 greenkeys archive:
> http://mailman.qth.net/archive/greenkeys/greenkeys.html
> >>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
> http://comcents.com/tty/greenkeyssearch.html
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to ve6bgt at gmail.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20230708/9f89f9cc/attachment.html>