[GreenKeys] Western Union 21-A

[Duncan Brown]

Dale,

What type of "21-A tube transmitter" are you asking about?

An RF transmitter or a TTY tape reader?

Western Union reused model numbers, so there could have been a 21-A tape 
printer, a 21-A tape reader, a 21-A page printer, and maybe even a 21-A 
RF transmitter??


If you are asking about the 21-A Multiplexed tape printer, then the 
SMECC.org site that John listed is a good source.

Have fun,

Duncan
K2OEQ

On 30-May-21 23:45, John wrote:
>
>
> On 5/30/2021 2:45 PM, Sea Horse via GreenKeys wrote:
>> Hi, I am looking for any information regarding the 21-A tube 
>> transmitter as seen in RTTY magazine. If you have any ideas for a 
>> transmitter, they would be welcomed as well. I have some photos of 
>> the 21-A if you would like them.
>> 73, Dale VE7YTB
>>
>
>  Here is some background Stuff on these instruments:
>
>
> https://www.smecc.org/m_21-a_western_union.htm
>
>
> Enjoy!
>
>
> Cheers
>
> John KB6SCO
>
> Carson City
>
>
>
>
>
> ______________________________________________________________
> 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 duncanancy at earthlink.net