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

Sat Sep 19 02:05:55 EDT 2015

This  15 has a really nice  white ceramic  fuse holder in  it.  I have one 
other UPI unit that  was  from out of  state  I have not  really looked hard 
at  so it  my have the  screw  in type too.  I stand  corrected on the  KOT 
 UPI model  15... it too has  the screw in base  fuses as  well....
as  thus... ( had a picture on the server!)

In a message dated 9/18/2015 10:42:52 P.M. US Mountain Standard Time,  
1oldlens1 at ix.netcom.com writes:

I wish I had been paying more attention; I saw  Fusetrons for sale 
somewhere unexpected just recently.  I think it was  Home Depot.  There are still 
some homes with fuse boxes that use these. I  think the ordinances in Los 
Angeles require homes to have circuit breakers and  not fuses.  Its certainly so 
for rental units but I am not sure about  private homes.  In any case 
Fusetrons seem to still be around.  
I have seen other old electronic equipment with conventional  Edison screw 
base fuses.  Most later equipment uses cartridge style fuses  in clip fuse 
holders. I think even Radio Shack has fuse clips. The fuse  holders for screw 
base fuses are nothing more than ceramic lamp holders.   Fusetrons also go 
in these but with an adaptor to accept the special thread  that keeps you 
from putting in the wrong sized fuse.  The adaptors can't  be removed without 
destroying them.  
If Teletype  did not install fuses its possible UPI did in order to protect 
the machine and  perhaps also to avoid running afoul of ordinances.  

On 9/18/2015 10:20 PM, Ed Sharpe Archivist for  SMECC via GreenKeys wrote:

adding this  to public   archive as here is my  value  for  the upi unit  
which I took home  to clean  lube and adj.

my other units have  anything  from  nothing  to  a   regular  looking  
fuse and holder that   looks  like   one  used inside a  radio.

as to the value  I am not there  right  now.but  the  UPI recent 15   ((HA  
You can buy 4  for  70 bucks?!?!?!?

here is a new listing  for my fusetron fuse by another   mfr...  someone 
may want to educate us  on  valuses   needed

 (http://www.zoro.com/i/G3449686/)  *   _Fuse,  3-2/10A, T, 125VAC, 
Screw-In, PK4_ (http://www.zoro.com/i/G3449686/) 
    *   $70.25   
    *   BUSSMANN   
    *   G3449686T-3-2/10  

In a message dated 9/18/2015 9:41:24 P.M. US Mountain Standard Time, 
_drlegendre at gmail.com_ (mailto:drlegendre at gmail.com)  writes:

Ed,  

Have had the fuses replaced with +what+ ?? ;-)

On Fri, Sep 18, 2015 at 11:14 PM, <_COURYHOUSE at aol.com_ 
(mailto:COURYHOUSE at aol.com) > wrote:

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_ (mailto: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?

______________________________________________________________
GreenKeys  mailing list
Home: http://mailman.qth.net/mailman/listinfo/greenkeys
Help:  http://mailman.qth.net/mmfaq.htm
Post:  mailto:_GreenKeys at mailman.qth.net_ 
(mailto:GreenKeys at mailman.qth.net) 

2002-to-present  greenkeys archive: 
http://mailman.qth.net/pipermail/greenkeys/
1998-to-2001  greenkeys archive: 
http://mailman.qth.net/archive/greenkeys/greenkeys.html
Randy  Guttery's 2001-to-2009 GreenKeys Search Tool: 
http://comcents.com/tty/greenkeyssearch.html

This  list hosted by: _http://www.qsl.net_ (http://www.qsl.net/) 
Please help  support this email list: http://www.qsl.net/donate.html

______________________________________________________________

GreenKeys mailing list

Home: http://mailman.qth.net/mailman/listinfo/greenkeys

Help: http://mailman.qth.net/mmfaq.htm

Post: mailto:GreenKeys at mailman.qth.net

2002-to-present greenkeys archive: 
http://mailman.qth.net/pipermail/greenkeys/

1998-to-2001 greenkeys archive: 
http://mailman.qth.net/archive/greenkeys/greenkeys.html

Randy Guttery's 2001-to-2009 GreenKeys Search Tool: 
http://comcents.com/tty/greenkeyssearch.html

This list hosted by: _http://www.qsl.net_ (http://www.qsl.net/) 

Please help support this email list: http://www.qsl.net/donate.html

-- 

Richard Knoppow

_1oldlens1 at ix.netcom.com_ (mailto:1oldlens1 at ix.netcom.com) 

WB6KBL

______________________________________________________________
GreenKeys  mailing list
Home:  http://mailman.qth.net/mailman/listinfo/greenkeys
Help:  http://mailman.qth.net/mmfaq.htm
Post:  mailto:GreenKeys at mailman.qth.net

2002-to-present greenkeys archive:  
http://mailman.qth.net/pipermail/greenkeys/
1998-to-2001 greenkeys archive:  
http://mailman.qth.net/archive/greenkeys/greenkeys.html
Randy Guttery's  2001-to-2009 GreenKeys Search Tool:  
http://comcents.com/tty/greenkeyssearch.html

This list hosted by:  http://www.qsl.net
Please help support this email list:  http://www.qsl.net/donate.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20150919/d5c3d3dd/attachment.html>