&graemedavidson499 I have let out the mysterious blue smoke many times, but the only message I have learned to read is “I am not going to work any more.”😂
"Telephony" has some must-read sections for sound engineers - particularly "side tone" aka foldback. It really helped me with stage monitors and headphones in the studio. I could make singers sing softer or harder just by controlling what they were hearing.
If you see an old joint box or manhole cover in the UK (the ones with a wide cast iron surround and a concrete centre) the oldest ones will have P.O Telegraphs or G.P.O Telegraphs written in the cast iron. Later ones changed to P.o Telephones. Things are going full cirlce now with the closing down of PSTN exchanges where the cables used to carry telegraph data before voice and now they're carrying internet data.
Very well explained. Keep up the good work - look forward to the next instalment. Getting creative with the camera work and a bit of ADR at 8:25 I think. And just to prove I was paying attention, Hans Christian Ørsted died 1851 but apparently discovered his invention in 1920 😂 (05:20).
I didn't realise binary coding for letters and numerals predated the electromagnet/relay! Fascinating! One small bit though, exponential growth is anything that is multiplied by the same factor every time. Whether it's 2, 10, or 5000 the same exponential curve will be drawn. (Though if you plotted them together, some would look more squished than others!) The maddening thing about exponents, and near-infinity, is that once the curve is asymptotically approaching vertical... they quickly all come to the same figure regardless of this "speed". When that's drawn on a graph it looks like one straight line and one right-angled line going to the same point, with all the curves you could possibly draw in-between them.
In the era of telegraph communication with operators it was suggested the receiving operator would hear the incoming message, then sharpen his pencil and write it down. On trans-Atlantic cables they followed the incoming dots and dashes with a pen recorder onto a paper strip. The operator would then look at strip and write the text. Later they used typewriters to print the text, on line text was often abbreviated and the operator had to expand to full words. Stories told me by a college who worked on long distance cables during 1930s.
I often think of how long it took for someone to make the next step, invent the next thing. Like when Örsted saw a compass needle mowe, then some ten years to invent the electromagnet, then another ten years for the relay. Of course it was completely new territory but a lot of people were experimenting.
Don't forget the heliograph. Of course it made more sense in the American west where there was a lot of sun and flat ground. en.wikipedia.org/wiki/Heliograph
Thanks for the great video! Morse isn't binary (dot and dash) because spaces have meaning. And the space between dots and dashes in a letter, the spacing between letters, and the spaces between words is all different.
I study recreational cryptography (solving secret messages for fun), and telegraphy and Morse code figure in significantly to the history of cryptography through the U.S. Civil War and up to WW II. I've read or seen examples of early attempts at electric telegraph systems, but the one with the rotating dials is new to me. I'd like to learn more about that one.
In a way the telegraph is still with us. Various telegraph 'codes' are binary in nature and so is the Internet. You could transmit a web page via a 19th century telegraph.
Next you'll find yourself enamoured by teletype machines and figure out that old teletype standard from 1920s is still in use in modern day unixes, macOs and linuxes (android as well) as TTY standard. Modern TTY has a few more bits for lower case letters and works on low voltages, but with a high to low voltage converter adapter a mechanical teletype can very well talk to a modern linux or macOS.
There were semaphore signal towers in the UK as well. One connected London with the naval base in Portsmouth and on Ordnance Survey maps you can see hills called Telegraph Hills. Of course useless at night and in bad weather. When the London South Western Railway opened it's line from London via Eastleigh to Gosport (opposite Portsmouth across the harbour) they ran the first UK telegram lines alongside the railway line in 1845. It was installed and operated by Cooke & Wheatstone and the MOD rented one line and stationed naval personnel in the station telegraph office. Presumably message were then taken by boat across the harbour. It was 88 miles (142 km) long and used a two wire needle system. To get publicity for their invention Cooke organised a chess match between two prominent chess players in Gosport and amateurs in London.
vision is english and not ancient greek and they didn't go with the sense of seeing, sight. telesight, telesighty. vision is from latin through french.
@@edgeeffecti like that they went with tele instead of radiosight or radiovision or visualradio or visionradio nonsense (they tried it for a short while in finland)
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Amazing video, Mitch! This kind of camera work awakes the inner child in me😊
There’s a semaphore tower in byfleet. Used to take scouts there
Not enough camera angles 🤣
Nice to see a bit of crossbar ;)
What's next, Teleprinter/Teletype Tuesdays ?
Smoke signals never get old… it’s always the last words from seriously unwell electrical gear, albeit poorly understood at the time.
&graemedavidson499
I have let out the mysterious blue smoke many times, but the only message I have learned to read is “I am not going to work any more.”😂
Funny you should mention this. My brother’s washing machine did it this morning, scared my sister-in-law half to death.
Hey! I think I learned a few things. That usually doesn’t happen on RUclips. Thanks!
"Telephony" has some must-read sections for sound engineers - particularly "side tone" aka foldback. It really helped me with stage monitors and headphones in the studio. I could make singers sing softer or harder just by controlling what they were hearing.
Next step: Morse code! This is gonna be an awesome series, I re-learned a lot.
If you see an old joint box or manhole cover in the UK (the ones with a wide cast iron surround and a concrete centre) the oldest ones will have P.O Telegraphs or G.P.O Telegraphs written in the cast iron. Later ones changed to P.o Telephones.
Things are going full cirlce now with the closing down of PSTN exchanges where the cables used to carry telegraph data before voice and now they're carrying internet data.
Love this, will you be covering the early radio telegraphy as well? CW amateur radio is keeping morse code alive as a language.
Very well explained. Keep up the good work - look forward to the next instalment. Getting creative with the camera work and a bit of ADR at 8:25 I think. And just to prove I was paying attention, Hans Christian Ørsted died 1851 but apparently discovered his invention in 1920 😂 (05:20).
Ah oops 🙈
mmm... I noticed that! clever guy!
Oh wow the Relay naming had never occurred to me!
Gosh, I love these videos. Well done Mitch!
I worked on GPO Teleprinters and my name is Morse.
Dot dot dot. Dash dash dash. Dot dot dot
Aww no telefax
@@AMPProfMaybe in another episode.
Fascinating video. Thanks for making it. Can't wait for the next episode
I didn't realise binary coding for letters and numerals predated the electromagnet/relay! Fascinating!
One small bit though, exponential growth is anything that is multiplied by the same factor every time. Whether it's 2, 10, or 5000 the same exponential curve will be drawn. (Though if you plotted them together, some would look more squished than others!)
The maddening thing about exponents, and near-infinity, is that once the curve is asymptotically approaching vertical... they quickly all come to the same figure regardless of this "speed". When that's drawn on a graph it looks like one straight line and one right-angled line going to the same point, with all the curves you could possibly draw in-between them.
What an excellent episode, you actually had me laughing out loud! I am looking forward to parts 2, 3 etc.
Exploding with facts and fun...thank goodness part 2 is already out and I don't have to wait for more...
In the era of telegraph communication with operators it was suggested the receiving operator would hear the incoming message, then sharpen his pencil and write it down.
On trans-Atlantic cables they followed the incoming dots and dashes with a pen recorder onto a paper strip. The operator would then look at strip and write the text. Later they used typewriters to print the text, on line text was often abbreviated and the operator had to expand to full words. Stories told me by a college who worked on long distance cables during 1930s.
Don’t worry we’ll get to printing telegraphs in episode 2!
Amazing and super cool! Mitch is awesome🐶🙌🙌🤓
Another great video from the museum thank you
Nice work Mitch! 👍
Another great video. Thanks!
As often in French, there's a silent letter 🙂
It's pronounced Shap. You were really close, thank you ❤️
I often think of how long it took for someone to make the next step, invent the next thing.
Like when Örsted saw a compass needle mowe, then some ten years to invent the electromagnet, then another ten years for the relay.
Of course it was completely new territory but a lot of people were experimenting.
Great video Mitch!
"...arms like David Brent."
Don't ever change! 😂😃
Thanks for the interesting history lesson 😊
Don't forget the heliograph. Of course it made more sense in the American west where there was a lot of sun and flat ground. en.wikipedia.org/wiki/Heliograph
"Binary is weighted exponentially" And decimal digits are not? Of course they are!
not exponentially they're not
@@pigpenpete Please explain.
Ah well math was never my best subject. I meant more specifically that they double in magnitude. Still applies tho dunnit
@@hackmodular Sure, and decimal numbers are multiplied by 10 when moving to the left. It's the same thing.
Hoping you’ll cover telex as well
Thanks for the great video! Morse isn't binary (dot and dash) because spaces have meaning. And the space between dots and dashes in a letter, the spacing between letters, and the spaces between words is all different.
awesome!
Very interesting. My hobby is a radio amateur and still use morse code.
Love Tele* Tuesday.
Awesome
Absolute nerd stuff. Love it. 🎉
I study recreational cryptography (solving secret messages for fun), and telegraphy and Morse code figure in significantly to the history of cryptography through the U.S. Civil War and up to WW II. I've read or seen examples of early attempts at electric telegraph systems, but the one with the rotating dials is new to me. I'd like to learn more about that one.
is that bit about the french stock exchange what inspired dumas in count of monte cristo?
Yep!
In a way the telegraph is still with us. Various telegraph 'codes' are binary in nature and so is the Internet. You could transmit a web page via a 19th century telegraph.
Next you'll find yourself enamoured by teletype machines and figure out that old teletype standard from 1920s is still in use in modern day unixes, macOs and linuxes (android as well) as TTY standard. Modern TTY has a few more bits for lower case letters and works on low voltages, but with a high to low voltage converter adapter a mechanical teletype can very well talk to a modern linux or macOS.
Don’t worry it’s coming in a future episode!
I hope your opening times will include Sunday in march 2025. Plan to visit "this Museum is (not) obsolete on 30th of March 2025...)
There were semaphore signal towers in the UK as well. One connected London with the naval base in Portsmouth and on Ordnance Survey maps you can see hills called Telegraph Hills. Of course useless at night and in bad weather.
When the London South Western Railway opened it's line from London via Eastleigh to Gosport (opposite Portsmouth across the harbour) they ran the first UK telegram lines alongside the railway line in 1845. It was installed and operated by Cooke & Wheatstone and the MOD rented one line and stationed naval personnel in the station telegraph office. Presumably message were then taken by boat across the harbour.
It was 88 miles (142 km) long and used a two wire needle system. To get publicity for their invention Cooke organised a chess match between two prominent chess players in Gosport and amateurs in London.
Didn’t know about the chess match! Awesome
Dangit as if Atkins’ Telephony wasn’t expensive enough already! 😂
I recently shelled out for another copy (one for home, one for the workshop) only to realize of course the earlier edition only covers pre-2000 🙄😅
Parts available?
Th E LEyyy graphy
what about Whestone
Oh he features heavily in the next episode!
Your microphone needs to be in a better position or your signal boosted in editing.
- - . . - . . . - - 😁
Greek:
Tele - "at a distance"
Graph - writing
Phone - sound
Vision - vision
Telegraph
Telegraphy
Telephone
Telephony
Television
Tele...vis..iony?
Why doesn't the last one work?
To the annoyance of many at the time that the Greek naming convention got dropped!
vision is english and not ancient greek and they didn't go with the sense of seeing, sight. telesight, telesighty. vision is from latin through french.
I always thought that "television" was one of those annoying hybrid Greek and Latin words like "astronaut" that really annoy some linguists.
@@edgeeffecti like that they went with tele instead of radiosight or radiovision or visualradio or visionradio nonsense (they tried it for a short while in finland)