[GreenKeys] 6 bit Teletype reperf

[Duncan Brown]

David,

On 12/3/2019 10:16, dmm at lemur.com wrote:
> My question has to do with something that Duncan said when he
> identified the ebay unit.  I'm sure that I must be misunderstanding
> something.  He wrote:
>
>> It typically sat on a little dolly under the M19 table
> Does this refer to the regular 5-level TTY reperforator, or to
> the 6-level TTS unit?
>
> I am *presuming* that it refers to the 5-level TTY reperf, because
> to the best of my knowledge neither TTY nor Fairchild ever made
> anything like a 6-level version of the Model 15 or Model 19 setup.
> Or am I wrong?  Did they?
>
My reference to the RPE reperforator sitting on a dolly under the M19 
table was for the 5-bit RPE.

I don't know of a 6-bit version of the M19. No reason that there could 
not have been one other than maybe  quantity. Obviously, the RPE (5-bit 
or 6-bit) could also sit on a table, as  you showed.

There certainly was a 6-bit version of the M15. It was the M20, as you 
referenced.


A TTS perforator requires additional counting equipment to handle
set (character width) and spaceband expansion, and a way of indicating
line length ranges to the operator.

The RPE reperf provided a storage media of the news (in upper & lower 
case) coming in from AP. There may have been other equipment that read 
the 6-bit tape from the RPE and added the extra information before it 
went to the typesetting equipment???

Glad you were able to get that 6-bit RPE reperf.

have fun,

Duncan