[GreenKeys] Joe's 28 RO

[Paul Heller]

Jack, that was an amazing bit of information. Thank you for sharing.

I'd live to try to set up something like this on one of my existing machines, to remotely enable/disable printing. I suppose parts and how-to's are hard to find....

Paul
W2TTY
ITTY:   HTTP://ITTY.INTERNET-TTY.NET:8000/ITTY
AUTOSTART: HTTP://ITTY.INTERNET-TTY.NET:8030/AUTOSTART

> On Apr 21, 2017, at 1:49 PM, Jack <wa2hwj at att.net> wrote:
> 
> ZCZC
>  
> That stunt box is set up for selective calling. I can see the stripper
> rod that goes across the lower section of the stuntbox.
> It would have function bars “programmed” for a certain
> sequence of letters that operate a slide
> that, in turn, moves the “O” codebar to allow the printer to print,
> unblocking the frontplate clutch on the left side of the typing unit.
> Another set of function bars would be “programmed” to clear
> the selected code and put the printer back into the “non-print”
> mode.  Coding could be anywhere from ZCZC to turn on
> to NNNN to turn off - or, several letters for turn on (“XZ”) and
> FIGS H LTRS to turn off. Sometimes, the selective calling function
> operates a solenoid on the left side that unblocks the frontplate
> clutch and the operated slide does other functions. I believe the
> RO had a toggle switch on the front. That probably operates the
> solenoid to allow an operator to monitor traffic on the circuit
> that isn’t directly coded to that machine. These machines
> took a beating, reading traffic all day and monitoring for
> specific codes. Except for the “print” function, the machine
> would run almost 24 hours a day.
> In the 1970’s “electronic stuntboxes” were a hot item, though
> short-lived. Hams used a “SELCAL” to allow the machine to
> print when their call was received.
>  
> Jack K2TTY
>  
> NNNN
>  
>  
>  
>  
>  
> From: GreenKeys [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Jim Plummer via GreenKeys
> Sent: Thursday, April 20, 2017 4:50 PM
> To: Pete Lancashire <pete at petelancashire.com>
> Cc: GREENKEYS BULLETIN BOARD <greenkeys at mailman.qth.net>
> Subject: Re: [GreenKeys] 28 RO
>  
> Here are a few shots.  I counted 23 function bars in the stunt box.  The most I had seen before this was 6.  There are sets of electrical contacts to go with many of the function bars.  They are fed via a wiring harness.  I have not received any takers for this unit.  I thought a freebee would generate some interest. 
>  
> Jim
>  
> On Thu Apr 20 2017 08:47:33 GMT-0400 (Eastern Daylight Time), Pete Lancashire <pete at petelancashire.com> wrote:
> Can I get a couple pictures of the stunt box ? Just want to see some examples of 28's with options added.
>  
> -pete
>  
> On Tue, Apr 18, 2017 at 4:09 PM, Jim Plummer via GreenKeys <greenkeys at mailman.qth.net> wrote:
> 
> I have a 28 RO up for grabs.  I picked up via Craigslist a few years ago from a guy that told me his grandfather acquired it from the railroad.  He had kept it in a storage building behind the house. It had been there for a while.  The cabinet is a bit rough at and near the bottom.  The motor turns "hard" by hand.  I have not tried to power it up.  The gear set appears to be 75 WPM.   It does need a bath and some TLC.  It appears to be complete.  There are numerous contacts at the stunt box that I had never seen on military tty.   I have had it in my shop since I got it.   I had intended to rebuild it, but have been over run by Kleinschmidts.   I would like to find someone to adopt this one.  If I keep it, I don't know when I'll get to it, if ever. 
>  
> I'm in Greenville, SC for pickup.  
>  
> de Jim - K8ARY
> 
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