[GreenKeys] M28 identification - Mark I vs Mark II vs Mark III

[John, W9DDD]

Out of 4 printers, all have the newer left side plate/stunt box 
mounting.  Only one has the wire spool hold downs.

Probably not enough of a sampling and bear in mind some of these have 
probably been rode hard and put away wet.  The one with wire spool hold 
downs probably the closest to factory original, it's a sprocket feed 
version. it appears to have been in storage for a very long time (and 
not necessarily good storage).

John, W9DDD
Ich habe dreimal abgeschnitten uns jetzt zu kurtz. (I cut it off 3 times 
and it's still too short.)

On 8/22/2019 4:56 PM, Nick England wrote:
> Created a page and added a few photos -
> http://www.navy-radio.com/tty/28-mark.htm
> Cheers,
> Nick
> 
> On Thu, Aug 22, 2019 at 1:46 PM Nick England <navy.radio at gmail.com 
> <mailto:navy.radio at gmail.com>> wrote:
> 
>     More idle curiosity - and to create a web page with some info and photos
>     I think I know the following quick ID features:
>     Mark III
>        - new style cam transfer levers for keyboard transmitter.
>        - new style keyboard hood and key guide with 2 screws for clear
>     info covers
>        - printer has new style left side mounting for stunt box
>        - printer ribbon spool hold-downs are wire
>     Mark II
>        - old style cam transfer levers for keyboard transmitter.
>        - old style keyboard hood and key guide with one screw for clear
>     info covers
>        - printer has old style left side mounting for stunt box
>        - printer ribbon spool hold-downs are solid
>     Mark I ???
>       - is this like a Mark II but with the very early 2-row electrical
>     connectors?
> 
>     Did the printer and keyboard have separate Mark generations?
>     i.e. Was there a Mark III keyboard before a Mark III printer or did
>     they change at the same time?
> 
>     I'm sure there are some glaring differences that I have completely
>     overlooked - additions and corrections are welcome!
> 
>     Nick England K4NYW
>     www.navy-radio.com <http://www.navy-radio.com>
> 
> 
> 
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