[GreenKeys] Kleinschmidt TT-4C/TG not printing

[Kevin H. Phillips]

	> Looks like there is a line switch for selecting the current loop.
Would

	> verify that it is in DC Line.

	>


	Yes, I have had it set to DC Line.  I was very glad to find that
manual online and have been using it a lot!  Thank you,
Nick!   I "think", but do not know for certain, that
the machine may have been in a 20ma set-up before and so that's why I
wondered if it had been hardwired for 20ma.  I have tried the
various set-ups shown in the manual but still haven't been able to get it
to print ITTY.  It is possible it is geared for 100wpm so I will try
that channel of ITTY but I would have thought it would at least print
garbage.  There is no "chatter" from the magnets at
all.


	 


	73


	Kevin

	> According to a TT-4 manual on this site.

	> https://rattrig.com/manuals/tm's.htm

	>

	> (2) Set the LINE switch of the TT-4(*)/TG and TT-335/TG (fig. 1-7)
to Dc

	> line for 60-ma signal circuit operation (operation in a dc system)
(fig.

	> 1-3) or to VOICE FREQ LINE for 20-ma signal circuit operation
(operation

	> in

	> a voice- frequency system).

	>

	>

	> On Tue, Oct 4, 2022 at 9:11 PM Kevin H. Phillips
<kh-phillips at 9-5usa.org>

	> wrote:

	>

	>> To follow up on this message I posted: I have finally gotten
the

	>> machine back to printing from the keyboard. The problem probably
was

	>> oil somewhere it shouldn't have been but the fix took some
time.

	>>

	>>

	>> I tried inserting pieces of paper between the armature and
magnets to

	>> absorb any oil. This did not help (at least at first or as far
as I

	>> could tell).

	>>

	>>

	>> I eventually tried spraying Contact Cleaner (WD-40 brand; it
dries dry)

	>> between the magnets and armature. This did not help. This
evening I

	>> started spraying the Contact Cleaner more liberally all over the
magnet

	>> area as well as on the electrical/electronic components behind
the front

	>> panel. This began to help. I kept typing RY's

	>> (one-handed/two-fingered) while adjusting the Range and
Armature

	>> controls back and forth. I spent a lot of time doing this. All I
can

	>> say is that it finally started working properly. I was typing
many lines

	>> of RY's as absolutely fast as I could without a single
character

	>> dropped.

	>>

	>>

	>> Another thing I tried was reducing the line current via the
rheostat on

	>> the front panel. I turned it down as far as it would go but the
meter

	>> would not read below 30ma. I tried slightly increasing it in
stages up

	>> to about 45ma but the magnets seemed happiest at 30. I may try a
TU

	>> with an adjustable loop and see if I can get it lower and see if
that

	>> helps . . . or hurts.

	>>

	>>

	>> It still will not print ITTY. The loop locks up and I can type
on the

	>> keyboard but there is no print from ITTY. I am going to try
reducing

	>> the audio output and see if that does any good. It is the only
thing I

	>> can think to try at the moment. Maybe the loop current is too
high

	>> and/or the signal strength is just higher than these magnets can
handle

	>> (??)

	>>

	>>

	>> 73

	>>

	>> Kevin

	>>

	>> W5TTY

	>>

	>>
______________________________________________________________

	>> 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

	>>

	>> >>> Jordan Spencer Cunningham's GreenKeys Search
Tool:

	>> https://teletype.net/gksearch

	>> >>> 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

	>> Message delivered to craneplc at gmail.com

	>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20221005/6a565b9d/attachment.html>