myglaren wrote: 14 Nov 2023, 10:20
An odd coincidence there Jim.
I was reading just yesterday of a dad teaching his young kids the Morse code and the 'Q' codes. He was ex-military and a radio ham.
Kids had two-way radios and would practice all the time.
One day they were with him shopping and doing it out of sight of one another in the shop when a third 'voice' broke in and was asking and answering .
Turned out to be another ex-military radio operator, long retired, who was both amused and impressed with the kids ability.
They made a friend that day,
That is utterly magical Steve
NewcastleFalcon wrote: 14 Nov 2023, 11:14
A quest.
Bring to the thread an original photo of a piece of Meccano
I can't. Unusually perhaps, as a kid I never had Meccano. Mainly because I had enough of the real thing to play with and learn on!
I do like that morse machine... It looks very much like an inker to me... It would convert the incoming morse into a representation of dots and dashes on that long thin roll of paper so it could be read at leisure...
Also, similar to how a lot of the raw traffic for Bletchley Park was recorded. Here a device known as an undulator was used to record the patterns made by the frequency-shift keying of the German 'Sawfish' (Sägefisch) radio transmissions onto paper tape for reading and transcription to 5 unit tape for onward transmission to Bletchley park via secure teleprinter and subsequent decryption by Colossus...
To have skilled operators, known and Slip Readers, interpreting the undulator output was a lot more accurate than using electronic devices to do the job. Also, the Slip Readers could cope with QRM (interference) and QSB (fading) which the early electronic decoders couldn't... They still couldn't in my early professional days, until DSP and FFT techniquies came alomg...