[GreenKeys] 28KSR question...

[E.]

HI Ralph,

Yeah, I apologize, the first photo I attached last night wasn’t so good ;o … this one (attached) has a slightly better angle, where you can see the four bell wires from the stunk box, going to the unoccupied connector :) .



> On May 13, 2020, at 7:55 am, Ralph Irish <w8roi at wowway.com> wrote:
> 
> Eric
> 
> For something as elementary and regular as the Bell function, there may not be a great deal of
> differences in wiring.  For many other things, though, there are almost as many different,
> 'standard' diagrams as there are keys on the keyboard!  Just depends on who was going to be
> using a machine and how many machines they were expected to buy from Teletype.  Two of those
> four wires are wired to the switch that activates the bell.  Not certain about the other two.
> 
> Those switches are manufactured 'two to an assembly' and sometimes had both an open and a 
> closed contact.  Some of the open contacts are held closed by positioning, and the reverse
> also holds true.  This was set up to be as versatile as possible for anyone doing 'programming'
> of stunt boxes.
> 
> If you carefully, and I mean  CAREFULLY, use a live power cord and apply 115V very quickly to
> terminals 29 & 30, or wherever the bell wires terminate, you should hear a 'ding'.  MAKE
> CERTAIN THAT EVERYTHING IS POWERED OFF AND ALL PLUGS TO ACCESSORY EQUIPMENT PULLED WHEN YOU
> DO THIS.  Don't rely on any other switching to assume that it is safe with anything else
> plugged in.
> 
> If you get the 'ding' that means the bell is OK, and that there is some other interruption
> in the Bell circuit.  Wire tracing and an ohmmeter will be required, probably.
> 
> -   -   -   -
> 
> I can see orange and yellow wires in the left side photo on the switches and the same colors
> on the 'occupied' connector in the second photo.  I don't see any wires on the auxiliary
> connector in the second photo.  The 'occupied' connector should also have the wires from
> the selector magnets and possibly others from other equipment installed.  Maybe an
> Answerback trip solenoid, or a print suppression solenoid, etc.
> 
> That second (auxiliary) connector is there in case more switches are installed to do some
> 'tricks' or stunts, from incoming signal sequences.
> 
> Good luck!
> 
> Ralph - W8ROI
> 
> -   -   -   -   -   -   -   -
> 
> 
> On May 12, 2020, at 9:18 PM, E. wrote:
> 
>> 
>> Thanks all for all the replies ^^ !  I believe the bell contact board is this little guy in the photo attached, right?  It appears that the wires from it go to the empty connector on the right - in the second photo (attached)… so it really goes no where.  If I’m looking at it correctly - why is this???  Is there a way to rectify the situation ;p ?  Will look at the wiring diagram after supper…..
>> 
>> 
>> <IMG_0054.jpg><IMG_0055.jpg>
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