[GreenKeys] Model 28 - "A Step Forward in Printing Telegraphy"

[John, W9DDD]

I like that simplified KSR schematic on page 7 although actual practice 
has some differences as far as some details like parallel selector 
magnets with a line relay instead of serial connection you see in most 
WD that has the line relay.

I noticed the margin lamp is wired to  low voltage like the typical ASR. 
  I've always wondered who thought a 60 volt lamp in series with a 
resistor was a good idea?

John, W9DDD


On Jun 13, 2020, at 8:23 PM, Nick England <navy.radio at gmail.com 
<mailto:navy.radio at gmail.com>> wrote:

> Also thanks to Ralph W8ROI, I have scanned "A Step Forward in Printing 
> Telegraphy", a 1954 AIEE article on the Model 28 by A.S. Benjamin and 
> W.J. Zenner
> http://www.navy-radio.com/manuals/tty/sales/m28-step-forward.pdf
>
> Nick England K4NYW
> www.navy-radio.com <http://www.navy-radio.com>
> ______________________________________________________________
> 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 w9ddd at tapr.org <mailto:w9ddd at tapr.org>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20200613/29631494/attachment.html>