[GreenKeys] M15 How to disable unshift-on-space?

Ed Sharpe Archivist for SMECC via GreenKeys greenkeys at mailman.qth.net
Sat Sep 19 00:14:57 EDT 2015


our  latest  UPI  ro 15  has the screw in  fuse!   all other 15s  we have 
had  the fuses   replaced.
Ed#  _www.smecc.org_ (http://www.smecc.org) 
 
 
In a message dated 9/18/2015 8:59:38 P.M. US Mountain Standard Time,  
drlegendre at gmail.com writes:

Wow, so the household fuse is correct - that's just nuts! Maybe  I'll pull 
it and bypass with a 1A slow-blow and maybe a CIL to deal with  inrush 
currents. The present arrangement just isn't what I'd call proper  'protection'.. 
 


In other news, I think I've corrected the aberrant behavior. And yes, it  
does seem like it's all down to that very fine clearance between the cutout  
lever and the vertical extension of the SP function lever. I added a few 
turns  of solid metal foil tape to the little dog-leg on the end of the cutout 
lever,  to reduce the clearance to nearly nil.. maybe 0.002 or so.


And the USOS is gone, at least for now. Obviously I have a lot more to  
learn about this mechanism, but for now, I'm stunned that such a tiny little  
gap could allow the unwanted behavior. My hunch is that something else,  
somewhere, is either improperly adjusted, improperly installed, or just plain  
worn. Very surprising, but again, I have much to learn.


I will post a pic of the connector box in a few minutes. But for now, the  
machine is behaving as I'd like... =)


On Fri, Sep 18, 2015 at 10:09 PM, Jim Haynes <_jhhaynes at earthlink.net_ 
(mailto:jhhaynes at earthlink.net) > wrote:

All  the ones I've seen use the screw-type household fuse, except it's
an odd  value like 6 1/4 amp slow-blow.  Remember that the motor draws
much  more starting current than running current.  Also some  installations
include a 120VDC power supply, and there is often a  convenience outlet
on the side of the base where the repair guy can plug  in a soldering
iron or a light fixture.  Not that I'd want to be  soldering on the wiring
while it is plugged into the power  line.

The bare machine doesn't care about polarity.  Those which  include a
polar relay on the base do.  And there are some variables  like a motor
control relay that is controlled by polarity.

Can you  send a picture of the Bell System box you are talking  about?







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