[GreenKeys] very cool Hell Feldfernschreiber demo

[Andreas Mueller]

Hi,

for further information about the Hellschreiber and its inventor Dr. 
Rudolf Hell please visit www.hell-kiel.de

Regards
Andreas, DD1LM

Am 28.04.2020 um 03:08 schrieb Duncan Brown:
> The AWA Museum has a prototype of the M17 from about 1925-30. The 
> engineer that worked on it was E. E. Kleinschmidt.
>
> Early tests in the 1920s with 5-bit TTYs over radio were not very 
> reliable. It was felt that the Hellschriber system would be more 
> robust. But when AT&T took over Teletype Corp. in 1930, the project 
> was shelved. In the late 1930s, the program was apparently revived, 
> the printer simplified and put into production.  The major market was 
> apparently a printer for police cars.
>
> The M17 prototype used the regular the TTY inked-ribbon on spools. The 
> mechanism to advance & reverse the ribbon was the most complicated 
> part of the printer. The 1938 version is much simplified with 
> apparently an inked sponge wetting the helix.
>
> For more information about the Hellschriber, see 
> https://www.nonstopsystems.com/radio/frank_radio_hell.htm
> There are details on the Teletype Corp equipment at 
> https://www.nonstopsystems.com/radio/hellschreiber-modes-other-mfrs-non-UK.htm#teletype-model-17
>
> have fun,
>
> Duncan
> K2OEQ
>
> On 27-Apr-20 18:46, W2HX wrote:
>> Hey Duncan. Do any model 17s survive?
>>
>> -----Original Message-----
>> From: greenkeys-bounces at mailman.qth.net 
>> <greenkeys-bounces at mailman.qth.net> On Behalf Of Duncan Brown
>> Sent: Monday, April 27, 2020 1:28 PM
>> To: greenkeys at mailman.qth.net
>> Subject: Re: [GreenKeys] very cool Hell Feldfernschreiber demo
>>
>> Thanks, Eugene! That is a good video.
>>
>> Teletype Corp made a compatible machine. It was known as the Model 17.
>> Its original purpose was to be a mobile printer because it is such a 
>> simple printing mechanism (the original dot-matrix printer).  But I 
>> think most of the M17 units were used to monitor German Hell 
>> transmissions during WWII. (Although Teletype Corp did make a Hell 
>> transmitter that converted a 5-bit Baudot tape to Hell format)
>>
>> Have fun,
>>
>> Duncan
>> K2OEQ
>>
>>
>> On 27-Apr-20 12:36, W2HX wrote:
>>> https://youtu.be/VDB7wmV7ekA
>>>
>>> Thought you would like it. Very cool. Radio and teleprinter condition
>>> superb.  I enjoyed it!
>>>
>>> 73 Eugene W2HX
>>>
>>>
>>>
>>>
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>>>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch
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>>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
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