[GreenKeys] TT-100G Selector Assembly

[Steve Garrison]

Thinking back 40 some odd years I don't think I ever used a gauge to set
those screws.  Just set them so that it takes a small amount of force to
move from one side to the other with the "same" amount of force on both
sides and the armature staying the way you moved it while power is off.
Doing lots and lots of machines it was a "feel" that was acquired!

Steve G./N4TTY

-----Original Message-----
From: The Rices [mailto:srice3 at cfl.rr.com] 
Sent: Monday, January 06, 2014 8:42 AM
To: Steve Garrison
Cc: <greenkeys at mailman.qth.net>
Subject: Re: [GreenKeys] TT-100G Selector Assembly

Thanks Steve. That helped a lot. I was referring to it with power off. I
kind of wondered if it might be that way as why else would they have bias to
pull it back but I have never worked on one.

Oh, and see, even 40 years later you still remember the parts! I have
trouble remembering where I lived back then. :) Anyway not sure what I will
do with the gram settings as I do not have a tension gauge and that may be
why the previous owner stopped. I will have to research a bit to see if
there is such a thing as a reasonably priced gauge.

Again thanks
Steve
N4YZA


On 1/6/2014 2:33 AM, Steve Garrison wrote:
> Are you referring to having power on or off when you manually moved the
armature to mark or space.  With power on and no loop current the armature
should move back to "space" due to the bias current through the magnets.
With power off I've seen them stay either way; sometimes dependent on the
adjustments on the leaf springs on the armature.  I'm calling them leaf
springs at the moment as I not sure I remember the proper terminology after
40 some odd years with out consulting a manual.  (Just checked a manual!)
And they are referred to as "armature leaf springs" on models that have them
(think the TT-100 did), and the adjustment for them is that it should take
10 grams of force to move armature from mark to space and from space to mark
with the selector magnets de-energized.  That being said, the armature
should stay in whichever position it is manually set when not powered on.
>
> Hope that helps.
>
> Steve G./N4TTY
>
>
>> On Jan 5, 2014, at 8:16 PM, "The Rices" <srice3 at cfl.rr.com> wrote:
>>
>> Question for those that might know more about these then me. (Not 
>> hard)
>>
>> I found the reason the keyboard was not accurate in sending to the typing
unit was a couple of reasons but one was the fact that the screws,nuts etc.
were loose on the Selector magnet assembly. I have removed the assembly and
see that someone had started to make adjustments and stopped.
>>
>> Now it is my turn and I have a question. When I reset the selector magnet
to the proper clearance before any other adjustments should I be able to
move the armature to mark or space and it stay there until I move it to the
opposite ? Before it was loading back to the space side when it was idle. I
wanted to be sure before proceeding to the next step.
>>
>> One other question, the manual says armature adjustment is parallel
within .002 inch but parallel to what?
>>
>> Oh, it has a 1 3/4 magnet and I have set it at .004 from the armature if
that helps and have the armature adjustment screw backed out at the present
time.
>>
>> Any help would be appreciated.
>> Thanks
>> Steve
>> N4YZA
>> ______________________________________________________________
>> 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
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2014.0.4259 / Virus Database: 3658/6979 - Release Date: 
> 01/06/14
>
>
>