[GreenKeys] M28ASR Strange Loop issue...found?

Sun Dec 11 20:35:49 EST 2022

The active ingredient (their trade secret) is oleic acid, which will remove
surface oxides, and tends to prevent their reforming.
There are a lot of naysayers, but many of them miss this salient point.

Scott W7SVJ

-----Original Message-----
From: greenkeys-bounces at mailman.qth.net <greenkeys-bounces at mailman.qth.net>
On Behalf Of Joe Duszynski
Sent: Sunday, December 11, 2022 6:03 PM
To: pdwills at cedarknolltelephone.com
Cc: greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] M28ASR Strange Loop issue...found?

Only problem it does not "deox" anything... "Lube-It" would be a better
description.

On Sun, Dec 11, 2022 at 7:03 PM Paul Wills <pdwills at cedarknolltelephone.com>
wrote:
>
> The contact cleaner is the only substance I found that actually does 
> what it says on the container.  I'm impressed.
>
> I read about it on a Hickok tube tester restoration site.
>
> PDW
>
> On 12/11/2022 6:07 PM, John W9DDD wrote:
> > For some strange reason I've never heard of DeoxiT.  To my surprise
Microcenter shows about 30 products with a DeoxiT search.  I see a mini
spray can or a 25ml liquid with needle dispenser that look interesting.  I
wonder if the flux they have would be useful for some of the old wires that
have gotten some corrosion.
> >
> > John, W9DDD
> >
> >
> >> On Dec 11, 2022, at 4:24 PM, W2HX <w2hx at w2hx.com> wrote:
> >>
> >> One bit of good news. Nick and others had suggested that I spray some
deoxit into the RJ jack and work it with a plug. I can now report that the
RJ jack is now properly "normalling" when the plug is removed! I tried to
work it without deoxit and it didn't work. The deoxit was the trick. Thanks
Nick et., al. for the suggestion!
> >>
> >>
> >> 73 Eugene W2HX
> >> Subscribe to my Youtube Channel: 
> >> https://www.youtube.com/@w2hx/videos
> >>
> >>
> >> -----Original Message-----
> >> From: W2HX
> >> Sent: Sunday, December 4, 2022 9:35 PM
> >> To: Greenkeys <greenkeys at mailman.qth.net>
> >> Subject: M28ASR Strange Loop issue...found?
> >>
> >> Ok everyone. I've got lots of updated information on my issue. To
recap, this ASR has been running very well for the last 15 years. Recently
the loop-driven LPR (sits on the keyboard contacts) recently stopped working
in the way it has for all these years.  I've spent the last week and have
poured dozens of hours into understanding how my ASR is set up. It was set
up by Jack Hart (sk) who knew what he was doing. Only problem is I didn't
know what he was doing hihi.
> >>
> >> Thanks to Nick, K4NYW who saved some of the materials from Jack, and
thanks to me for never deleting emails, I was able to find some original
correspondence with Jack dating back to July of 2005 when I first bought the
machine from him. I studied the diagram for the WU 9797 LESU ad nauseum and
learned a LOT.
> >>
> >> Here is how my electrical is configured.
> >>
> >> EXTERNAL LOOP (TRAFFIC) ---> KEYBOARD ---> TD ---> LPR (ON) ---> 
> >> POLAR RELAY INTERNAL LOOP 1 (KEYED FROM POLAR RELAY) ---> PAGE 
> >> PRINTER INTERNAL LOOP 2 (NOT KEYED, ALWAYS MARKING) --> LPR (OFF)
> >>
> >> I have a DPDT switch mounted beneath the ASR that connects the LPR to
one of two loops, either the internal loop (LPR OFF) and the external loop
(LPR ON). In this way, when I don't want to punch tape from the external
line, (OFF) it is connected to the internal loop and keeps the LPR in
mark-hold (closed) at all times.
> >>
> >> The problem (previously described poorly) was that when the LPR was off
(mark-holding, LOOP 1) it would run open. I spent days working on figuring
this out. I found that when I plugged an ammeter into the RJ (reperf jack)
it would close the circuit and work properly! This made no sense because
these jacks should be normalling (shorting) when a plug is removed. But in
this case, it seems to be open circuit.
> >>
> >> Ultimately, I must have damaged this jack when I was messing around
learning about the electrical configuration which must have caused this
problem. I wonder if anyone has any thoughts on this? I could attempt to
pull the LESU open it up and repair it. And I probably should but seems like
a bigger project than I'd like to take on at this moment. So I might just
make a shorting plug to do the business.
> >>
> >> In case anyone is interested, here is a video I made on the whole set
up and you can see the problem firsthand. And you can see how the problem
resolves with an ammeter in the RJ jack.
> >>
> >> https://youtu.be/ULO6B07koDM
> >>
> >>
> >> 73 Eugene W2HX
> >> Subscribe to my Youtube Channel: 
> >> https://www.youtube.com/@w2hx/videos
> >>
> >>
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> >>
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> > ______________________________________________________________
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> >
> >>>> 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 
> > pdwills at cedarknolltelephone.com
> >
> ______________________________________________________________
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> 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 
> joeduszynski1 at gmail.com
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>>> 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

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