[GreenKeys] Model 15 60 WPM Gears Wanted

[Doug Alderdice]

At 09:10 PM 11/28/2006 -0500, Charles Ring W3NU wrote:
>Doug Alderdice wrote:
>>Hi gang,
>>
>>I have a Model 15 RO unit here that I acquired about a year ago and have 
>>finally put power to.  I have discovered, though, that it is geared for 
>>75 WPM.  All my mechanical TTY is 60 WPM, so this "won't play nice" with 
>>the other machines around here.  Well, I do have a machine or two with a 
>>gear shift, but it's just easier if everything can talk 60.
>
>What commercial service was that 15RO used in? I had believed that the AP 
>radio wire service upgraded from 60 to 75 circa 1970, but was told, maybe 
>here, that they went to 67 and not 75. I ask because that wire service was 
>a major user of 15RO's.


I believe it came out of a telco CO, but am not entirely positive on 
that.  The platen shows a lot of wear in the first 10-15 characters of each 
line.  I am wondering if it was maybe a trouble recorder on a crossbar 
switch?  It also has a red ribbon in it, if that helps point to its former use.

It is definitely out of Bell System service as it has the wood table, 
Western Electric KS-series 120V DC power supply on the lower shelf, small 
paper circuit diagram stuck behind where the PS sits showing connections to 
the line... and the line cord is still attached to the small barrier-block 
style Western Electric terminals with three terminals on the block.  The 
red and black-plugged signal wires from the 15 plug into a jack under the 
table which is wired to the line cord and terminal blocks.

Doug, KA2WFT


D.