[GreenKeys] Fwd: Computer to teletype module...

Sun Feb 18 11:57:55 EST 2018

Sent from my iPhone

Begin forwarded message:

> From: WA3FRP <wa3frp at aol.com>
> Date: February 18, 2018 at 11:56:50 AM EST
> To: Henning Treumann <df3oe.henning at googlemail.com>
> Subject: Re: [GreenKeys] Computer to teletype module...
> 
> The rack that I referenced was originally associated with the Siemens TW39 in Philadelphia.
> 
> When I was hired in 1969, this rack was not being used and was not functioning.  Field Technicians would call and ask for manually generated test messages from the Exchange technicians - a big waste of manpower and time.
> 
> So much nicer to do such work in a “hands-free” way.
> 
> Glad to read that at least one of these racks continues to exist. As I recall it was all discrete component with 60ma loop interface and required -48V DC for power.
> 
> Does Heinz from Horsten speak any English?  Maybe I could send him a Telex message?
> 
> Finally, I am very much enjoying the ability to dial 81, 82 and 83 which brought back to my mind the long forgotten Siemens relay rack in Philadelphia. Congrats to Fred for his design!
> 
> 73
> Russ
> 
> Sent from my iPhone
> 
>> On Feb 18, 2018, at 11:16 AM, Henning Treumann <df3oe.henning at googlemail.com> wrote:
>> 
>> Hello Russ,
>> 
>> I know such racks. As I recall Heinz from Horsten has got one of those
>> but not functional I assume.
>> But similar functionality has Fred implemented into the i-Telex "Messgerät"
>> chip/software that you can access under the extension numbers 81 to 83.
>> Depending on the number you can access, a test transmitter transmitting RYRYs
>> with different speeds and distortions and also a test receiver to test your
>> teleprinter's transmitter. You dial up to it type something and you will receive
>> a distortion measurement of each transmitted character.
>> Also a "visible punch" is implemented. You dial up to it and type a word,
>> e.g. name and after a 10 seconds pause it will respond with human readable
>> characters to punch out. This is always big fun for kids at shows.
>> 
>> Of course, such electronic "toys" are no replacement for an original
>> relay rack. ;-)
>> 
>> 73
>> Henning
>> 
>> 
>> 2018-02-18 16:52 GMT+01:00 Wa3frp via GreenKeys <greenkeys at mailman.qth.net>:
>>> Life is sometimes full of regrets.  One regret that I have now, after being on i-Telex is that, in 1990,
>>> there was an entire relay rack, built by Siemens, that would receive a Telex call on multiple lines at the same time and generate RYRYRY and QUICK BROWN FOX test messages.  This was used by the
>>> Western Union Field Technicians to test that the Telex machine would copy correctly and with 80 points of range.  
>>> It was very simple, all the Field Technician had to do was dial 117 and there was an immediate connection to a test message
>>> that would print all characters and also had a feature where you could request increasing bias and distortion.  The regret is that I could have gotten this whole rack for free as it went into a dumpster. This would have been a wonderful feature to add to i-Telex and to preserve.  I wonder if any such equipment exists in Germany in a museum? 
>>> 
>>> 73
>>> 
>>> Russ - WA3FRP
>>> wa3frp at aol.com
>>> i-Telex 834328 WUTMPAM CHIL
>>> 
>>> 
>>> -----Original Message-----
>>> From: Nick <creativegardening at hotmail.com>
>>> To: GreenKeys <GreenKeys at mailman.qth.net>
>>> Sent: Sun, Feb 18, 2018 10:19 am
>>> Subject: Re: [GreenKeys] Computer to teletype module...
>>> 
>>> E  wrote :
>>> 
>>> >> (hardly any apps will do an automatic refresh on anything, from what I can tell - I could be wrong… but it would be nice to see an app that allows a Teletype to become a realtime information gathering machine again and not just an “if and when” type of thing~) <<
>>> 
>>> Well, there is a guy in Germany who developed something interesting for the iTelex system - he makes German weather forecast available. If that is possible, than, I guess, it wouldn't be a big deal for the right person to develop a permanent online feed for our teletype machines. 
>>> 
>>> Subjects could be: 
>>> - news in general 
>>> - weather by regions 
>>> - technology, especially NASA
>>> - sports and culture
>>> The list could be endless !
>>> 
>>> Yes, we have ITTY and I enjoy it a lot, I  mean a lot. A big THANK YOU to all the people who developed the system and of course a big THANK YOU to the maintenance crew of ITTY 24/7.
>>> 
>>> But there could be more. I am pretty certain that the teletype world will grow this way and users will make lots of noise.
>>> 
>>> The only challenge:
>>> Who is knowledgeable enough to develop something like that and who has the spare time - it could be a very time consuming project. 
>>> 
>>> Nick  -  N0NCQ 
>>> i-Telex  212503
>>> 
>>> 
>>> 
>>>  
>>> Sent from my T-Mobile 4G LTE Device
>>> -------- Original message --------
>>> From: "E." <hanyou at xsmail.com> 
>>> Date: 2/18/18 12:37 AM (GMT-05:00) 
>>> To: keelan at beefchicken.com 
>>> Cc: WA5CAB--- via GreenKeys <greenkeys at mailman.qth.net> 
>>> Subject: Re: [GreenKeys] Computer to teletype module... 
>>> 
>>> 
>>> Thanks for all the replies!  I’m going to have to comb through all of these, once I have a pause in getting my base station antenna up (having nice weather right now)…
>>> 
>>> One thing that I wish I could see - one that I would love to see on the software side, is a application that would take the NWS RSS watch/warning feed for a given county in the U.S., automatically refresh the feed every minute or so and hammer out onto the teletype whenever watch or warning would pop up (typing each only once - based on the unique watch/warning ID and only the text contained within the warning - not the extra RSS stuff).  Bonus points for three bells at the beginning of every message!  Sadly, there aren’t that many apps out there that can do that… and hardly any apps at all for Teletypes.  Too bad most aren’t made for Macs, also…..
>>> 
>>> (hardly any apps will do an automatic refresh on anything, from what I can tell - I could be wrong… but it would be nice to see an app that allows a Teletype to become a realtime information gathering machine again and not just an “if and when” type of thing~)
>>> 
>>> 
>>> > On Feb 17, 2018, at 11:24 pm, epvgk at limpoc.com wrote:
>>> > 
>>> > On Sat, Feb 17, 2018 at 06:21:37PM -0800, John Nagle wrote:
>>> >>   Exactly, My design could easily be made by a PCB assembly shop,
>>> >> but it's not an easy hobbyist project.
>>> >> 
>>> >>   There are no through-hole equivalents for many of the parts
>>> >> in that design.  It has a specialized switching power supply which
>>> >> uses modern switching power supply components. Those just aren't made
>>> >> in through-hole. The layout around the switcher has to have very short
>>> >> lead lengths or it won't work at all.  Having been forced to SMD,
>>> >> I went as far as I could towards all SMD.  Once you're set up to
>>> >> assemble SMD, it's easier to place SMD parts than through-hole parts.
>>> >> 
>>> >>   If there was a market for 100 of those things, it might be
>>> >> worth having them manufactured.  Less than that, not worth it.
>>> > 
>>> > I ended up selling close to that many of mine (at cost, mostly just to
>>> > subsidize getting them built.) I bet there would be a similar sized
>>> > market for yours, especially considering many people have only a single
>>> > teletype and don't need or want to deal with a separate loop supply. 
>>> > 
>>> > For that matter I want to build one of yours, too. The power stuff is
>>> > great and it would make life easier bringing a machine to conferences etc.
>>> >> 
>>> >> which requires an external 120VDC power supply and an external
>>> >> USB to serial converter.  I built and used several of those.
>>> >> But surplus 120VDC power supplies are now hard to find.
>>> > 
>>> > I feel like a compact switching loop supply is another project that might 
>>> > be worth doing for greenkeys...
>>> > 
>>> > 
>>> > eric
>>> > 
>>> > 
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