[GreenKeys] WU 22-A tape transmitter

Thu Sep 24 12:08:50 EDT 2015

Hi Ed,

I will keep you in mind.  This unit is not mine to sell so if we get
to that point, will need to discuss with the owner of the basement from
which it came.

In the near term, I think I'd like to poke around at it and try to make
it run (with a little assistance from an outboard microcontroller).

It seems that the tube socket plug on the short length of cable is not
original and as Jim suggested may have been added by a ham at some point.
I will consider removing that if it gets this unit closer to original.

Duncan sent a spec for the WU 1-A which looks nearly identical to this
-22 model.  The difference might be with the bi-polar signalling which
this -22 appears to use.

Anything I hook to it will be external and completely reversable so I
don't intend to butcher or damage it in any way.

To flip this over, maybe you want to lend me your -21 and I can build
a little demo for you with a micro that allows it to punch tapes which
can then be read on the -22 :-)

Chris N0JCF

On Wednesday (09/23/2015 at 05:13AM -0400), COURYHOUSE at aol.com wrote:
> I have   wu  leather  bound  book  of  secrets...
> remind  me  again tomorrow  and  will  dig  up.
>  
> we have a 21  here   winder if the 22   would  go on the table  with that?  
> if  so if  you  wanted to sell it  let us  know  as  we are  trying to  
> bring some of this sstuff together  for a  display Ed#  _www.smecc.org_ 
> (http://www.smecc.org)  
>  
>  
>  
>  
> In a message dated 9/21/2015 12:56:57 P.M. US Mountain Standard Time,  
> chrise at pobox.com writes:
> 
> On  Monday (09/21/2015 at 01:58PM -0400), Duncan Brown wrote:
> >  Chris,
> > 
> > As Jim said, it reads the tape in parallel, then a  mechanical parallel-to
> > serial converter combined it with the data from  2-4 other tapes to 
> produce a
> > multiplexed serial data stream.
> >  
> > We may  have some information on it in the AWA Museum Library,  but I 
> think
> > the schematic of it is pretty straight-forward. They where  designed in 
> the
> > 1910-20 period and used up into the 1930-40  period.
> 
> Hi Duncan--  your message came in just as mine was going  out.  I appreciate
> the info.
> 
> I will poke around with it for a  while and if I can make it go, maybe
> I'll bug someone to punch a 5-level  tape for me and then I can demo it
> to some youngsters (ie, the engineering  staff) at work ;-)
> 
> Thanks again,
> 
> Chris N0JCF
> 
> > On  21-Sep-15 11:14, Chris Elmquist wrote:
> > >Hi Guys,
> >  >
> > >Found one of these in someone's basement.  I think they  were discussed 
> on
> > >this list a while ago but I don't recall seeing  any hookup or connection
> > >info,
> > >
> >  
> >https://drive.google.com/folderview?id=0B6A73VHTVh23SkZhck9jUDJrSmc&usp=sharing
> >  >
> > >Do any documents exist for this unit?  Can it be used  stand-alone or
> > >does it need the rest of the TTY to make it  go?
> > >
> > >The earlier discussion suggested these were  1920-1930 vintage so what
> > >model Teletype would it have been used  with?
> > >
> > >I can't do much with a 5-level reader here  since I don't have a 5-level
> > >punch but it's still interesting to  me to know how these were used
> > >(electrically).
> >  >
> > >73, Chris NØJCF
> > 
> > 
> > ---
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> -- 
> Chris  Elmquist
> 
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-- 
Chris Elmquist