[GreenKeys] Two very newbie questions

Tue Jun 18 12:51:16 EDT 2019

We have a similar problem at the German teleprinter forum (www.telexforum.de)
currently
and we want to use some kind forum internal wikipedia.

Henning DF3OE
i-Telex: 925302

www.i-telex.net
www.telexforum.de

Am Di., 18. Juni 2019 um 18:48 Uhr schrieb John, W9DDD <w9ddd at tapr.org>:

>
> Do it like a FAQ?
>
> e. g.
>
> Q: Why do they say mark and space:
> A: Historically ..... etc.
>
> No, I'm not volunteering to do it, but would try to contribute.
>
>
> John, W9DDD
> Ich habe dreimal abgeschnitten uns jetzt zu kurtz. (I cut it off 3 times
> and it's still too short.)
>
> On 6/18/2019 10:58 AM, Paul Heller wrote:
> > Hey Joe. You are asking lots of questions and getting lots of answers.
> > How about collecting all this into a document for “newbies”? Sort of an
> > introduction to teletypes?
> >
> > I could put it on RTTY.com <http://RTTY.com>.
> >
> > Paul
> > W2TTY
> >
> > ITTY: HTTP://INTERNET-TTY.NET:8000/ITTY <
> http://internet-tty.net:8000/ITTY>
> > AUTOSTART: HTTP://INTERNET-TTY.NET:8030/AUTOSTART
> > <http://internet-tty.net:8030/AUTOSTART>
> > EUROPE: HTTP://INTERNET-TTY.NET:8040/EUROPE
> > <http://internet-tty.net:8040/EUROPE>
> >
> > On Jun 18, 2019, at 7:50 AM, Thomas Tillson via GreenKeys
> > <greenkeys at mailman.qth.net <mailto:greenkeys at mailman.qth.net>> wrote:
> >
> >>
> >> *Hi Gang:*
> >>
> >> *First, where/ does/ the bell mount in a Model 28 ASR and where is it
> >> electrically connrected to? *
> >>
> >> *The bell mounts **underneath**inside the bottom **cabinet**door. (See
> >> attached) A lot must be removed in order to install this correctly.*
> >>
> >> *However, it may be mounted anywhere inside the **cabinet**in an
> >> **unauthorized**quick dirty fix in any place that is convenient.*
> >>
> >> *The connections are 29-30 on the C block*
> >>
> >> *☠️ CAUTION this is 110 AC. Use proper **precautions**.*
> >>
> >> *Tom WB2TTY*
> >>
> >> *<IMG_0197.jpg>*
> >>
> >> In a message dated 6/17/2019 11:59:12 PM Eastern Standard Time,
> >> greenkeys at mailman.qth.net <mailto:greenkeys at mailman.qth.net> writes:
> >>
> >> Hi Again!
> >>
> >> Today has been a red letter day! First, I have got a line on a Fox
> >> Box! Yes, an honest to gosh electro-mechanical foxes generator. I hope
> >> that this works out. It will be neat to generate foxes without having
> >> to hand type and perf a tape. I cannot seem to type Quick Brown Foxes
> >> ten times in a row without a typo. Also, I received a brand new Model
> >> 28 bell for the ASR today, and several image tapes of Snoopy to
> >> demonstrate the capabilities of my teletypes. Thank you! You know who
> >> you are. I truly appreciate this.
> >>
> >> Now, I have two very newbie questions even though I have had these
> >> machines for years.
> >>
> >> First, where/does/ the bell mount in a Model 28 ASR and where is it
> >> electrically connrected to? Google has not been my friend on this.
> >>
> >> Second, back to a basic loop question. I have always thought of the
> >> loop as a current device... that is, when current flows, the selector
> >> electromagnets pull the little thing in and that is what starts the
> >> mechanical process of generating data. Now, is Mark when current flows
> >> and Space when there is no current?
> >>
> >> Part B to the second question... I never thought of the loop being a
> >> voltage device. Yes, I know that there is a rather stiff voltage to
> >> push the current through the loop wires and electro-magnets, and that
> >> the loop must be energized. Now, I am studying the manuals for a FSK
> >> unit (military), and there are two options to key the unit: a)
> >> shorting two terminals together, which would require a relay in series
> >> with the loop; and b) by applying voltage from the loop on another set
> >> of terminals. So is the Mark considered "positive" and the space
> >> "ground state"? So this particular FSK device has two methods of
> >> keying, either shorting one set of terminals together (via a relay) or
> >> by connecting the TTY loop directly to another set of terminals, one
> >> being "positive" and the other "ground". Even though the relay set up
> >> is more complicated, I think that it would be actually easier to
> >> implement as I would not have to figure out what wire is "positive"
> >> and what is "ground".
> >>
> >> Part C to second question... what type of relay should I use so that I
> >> do not bog down the loop?
> >>
> >> Eventually, I want to have a regular um, "QSO" (with another amateur
> >> to keep it legal), but that anyone can listen to. I can "call him" on
> >> the air and "send him" the content, and he can respond at the end if
> >> he wishes, but it would be more like a bulletin. I have been talking
> >> with a friend of mine about this so that way, I can argue that it is
> >> not a broadcast, but a rather a QSO.
> >>
> >> Any thoughts on any of this?
> >>
> >> Thank all of you so much!
> >>
> >> Best,
> >>
> >> Joe KB0TXC
> >>
> >> <IMG_0197.jpg>
> >> ______________________________________________________________
> >> 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
> >> Message delivered to paul0926 at comcast.net <mailto:paul0926 at comcast.net>
> >
> >
> > ______________________________________________________________
> > 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
> > Message delivered to w9ddd at tapr.org
> >
> ______________________________________________________________
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> 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 <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 df3oe.henning at googlemail.com
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