[GreenKeys] 1924 Mackay System Video

[Richard Knoppow]

     There is a lot of discussion on the SKCC list about the 
right way to handle a key. I think there were many techniques in 
use by professionals, some pretty far from what is supposed to be 
the "right" way. Also at about 43:00 a woman op is using a bug 
with an odd technique, a little reminiscent of the way Denise 
Stoops is shown in videos from KPH. She has a super good fist so 
I think there isn't really a "right" way.
     I have a sounder in a resonator it is LOUD, I wonder if the 
ops got deaf from their use.
     FWIW, resonators seem to have originated when typewriters 
came into use.
     This is a fascinating film, I wonder who the original 
audience was supposed to be. BTW, You Tube has a speed setting 
for 75% speed that is close to correct for silent films. I only 
wish I knew of a way to correct for the wrong format.

On 9/24/2020 8:21 AM, Duncan Brown wrote:
> Thanks, Harold!  very interesting (wish there had been more 
> views of equipment and fewer views of buildings!)
>
> TTY equipment at 40 min. in.
>
> at 40:28 "Punches the message in Morse on this tape"
> But at 40:34 shows a five-bit Baudot/Murray code being punched 
> into the tape, probably by a Morkrum "GPE/Iron Horse". Tape is 
> being read on a standard, parallel input tape reader, 
> essentially the same as used on the M14 "TD" (on the M14 tape 
> reader, the "distributor" did the parallel to serial conversion).
>
> 40:50 "Automatic Receiving" shows a Morkrum M12 without its 
> cover. The M12 printer was parallel input with its own motor. 
> This picture shows it with the keyboard plug-in, with its own 
> motor. You can just make out the goose-neck contacts for the 
> keyboard parallel to serial conversion and also a second set of 
> goose-neck contacts for the printer serial to parallel conversion.
>
> 41:32  This was a synchronous system - how did they maintain 
> synchronization?  ( "very carefully")  This was one of the 
> problems with the synch. multiplex system - it was difficult to 
> maintain synchronization mechanically.
>
> 41:50 Morkrum M12 with cover.
>
> 42:10 I've never seen anyone  handle a key this way!
>
> Have fun,
>
> Duncan
> K2OEQ
>
>
> On 23-Sep-20 13:45, Harold Hallikainen wrote:
>> https://www.youtube.com/watch?v=6fu6-jrzOyM&feature=youtu.be
>>
>> I got this link from the California Historical Radio Society. 
>> This silent
>> movie shows the operation of a major telegraph company 
>> including views of
>> installing and repairing overland wires and undersea cable. 
>> Mostly
>> straight key telegraphy, but a little printing telegraph.
>>
>> I thought it was great!
>>
>> Harold
>>
>>
>
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL