[GreenKeys] Joe's 28 RO

Fri Apr 21 09:58:08 EDT 2017

Jack, thanks.

Still learning a lot.

On Fri, Apr 21, 2017 at 4:49 AM, 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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