[GreenKeys] Model 19 progress and a few questions...

[WA5CAB at cs.com]

There are some errors in the Model 15 write-up.  One is that the two line 
currents are 30 mA and 60 mA.  They are actually (as shown on the M15 
schematic) 20 mA and 60 mA.  Another is the statement that both the Pulling and the 
Holding type selector magnets can be wired series for 20 mA or parallel for 
60 mA.  This is only true for the holding magnets.  The pulling magnets are 
already in series for 60 mA.

Sounds like your M19 has a holding magnet selector.  In which case the 
switch should be marked S for Series and P for Parallel.  

Most of the M15's I've had don't have a line jack, only terminals on a 
terminal strip for connection to the external line..  But if yours has a 1/4" 
2-circuit jack, Line means the external signal line.  Unless the machine has a 
switch for doing this, you will probably need to plug a shorted phone plug 
into the line jack in order to get   Or at least you will if the loop supply 
is internally connected.

In a message dated 08/05/2017 18:53:18 PM Central Daylight Time, 
pete at petelancashire.com writes: 
> 2:  Where are contacts 9 through 12?  Looked and looked - no see ;p .
> 
> 
> 
> 
> They are the contact block that goes to the printer. The printer "sits" on 
> the contacts.
> 
> 
> BTW depending on the age  of your printer the selector magnets may be 
> different
> 
> 
> http://www.rtty.com/development/teletype/model-15/index.html
> 
> 
> On Sat, Aug 5, 2017 at 3:35 PM, E. <hanyou at xsmail.com> wrote:
> >> 
>> 
>> Hi all!
>> 
>> 
>> For the past week, I’ve been working diligently at scoping out my Model 
>> 19 (into the late night ;o ~) - trying to get it up and running.  I have 
>> 75% of the wiring checked out.  I know there’s a short in the perforator 
>> section that I’m going to find here soon (hopefully)… keeps on blowing the 
>> 62ma fuse that I have whenever I switch over to it.  Starting to look at 
>> the mechanical side of it, too… but first a few of questions as I go along:…
>> 
>> 
>> 
>> (circled in attached image)
>> 
>> 
>> 1:  What is the line jack and what does it do?  I think I’ve figured out 
>> where it is, but no clue what its purpose is.
>> 
>> 
>> 2:  Where are contacts 9 through 12?  Looked and looked - no see ;p .
>> 
>> 
>> 3:  The selector magnets have six wires coming off of their terminals.  
>> Two wires, I believe, go up to a resistor, mounted above the magnets (with 
>> three wires to/from the resistor) and then eventually lead to a switch 
>> next to it, which has six wires coming to/from it (top-left side of the main 
>> unit).  Can’t find this on any wiring diagrams that I’ve seen.  The 
>> switch is in the up position and I think it reads “S” (going off of memory - 
>> the teletype is in the basement right now).  I think I know what the switch 
>> is, but don’t know where to trace the wiring to with the ohm meter since 
>> it’s not on any diagrams ;o .  I guess my question is, help on locating, 
>> please :) ?
>> 
>> 
>> 
>> 
>> 
> 
> 
> 

Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480
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