[GreenKeys] Model 26 Update

[Doug Alderdice]

On 2/19/2015 12:18 AM, Ed Sharpe Archivist for SMECC via GreenKeys wrote:
> Doug-   so when you ran it  before  it ran ok with just the one  coil.
> any difference   with the  2 coils active!? more info?

Interestingly enough the machine did appear to operate OK with just the 
one selector magnet coil when I ran it briefly Tuesday evening.  I did 
notice earlier in the day when I tried it just in its own local loop 
that some characters didn't appear to type/print correctly, but at that 
point I was blaming possibly dirty contacts in the keyboard distributor.

Putting the machine into the house loop -- which is powered from a HAL 
ST-5000 -- everything seemed to work OK.  I think the little loop supply 
I was using -- a home brew thing with a C7 Christmas tree lamp for the 
ballast resistor -- might've been showing up the missing coil.

With the repaired coil the machine operated very well, though I can't 
say that I saw any difference, and looking at the printed copy from both 
runs I don't see dropped or incorrect characters from Tuesday's test.

I was fortunate, nay d*mn lucky, that the damage to this coil was such 
that it wasn't too hard to repair.  I didn't have to remove anything 
from the machine; at first I thought I might have to remove that coil 
from the selector to work on it.  I was able to find two ends with 
enough lead on them to be able to test continuity and more importantly, 
tack solder a splice to them.

> Congrats on your progress.

Thanks.  It's given me a bit of kick-start back into playing with my 
Teletype machines again.  When I was "burning in" the 26 on ITTY last 
night I turned on a couple of other machines in the livery here and 
exercised them, too.  Most of my machines are in the house loop so I can 
throw 'em on whenever something is going on the loop.

73,

D.


> In a message dated 2/18/2015 8:40:48 P.M. US Mountain Standard Time,
> ka2wft at arrl.net writes:
>
>     I got working on the newly acquired Model 26 this afternoon
>     primarily to
>     replace the power switch wiring.  That went relatively smoothly, and I
>     also rewired the break button.  The previous owner had everything wired
>     with shielded cable, and used the center conductors of two cables for
>     the two leads to the power switch ... strange.  And those center
>     conductors were 22 AWG.  :/  The break button was also wired normally
>     open.  Hmm.