WEIRD SOUND MAKING TYPING TELEPHONE THINGY - minicom 5000

[@LOOKMUMNOCOMPUTER]

name something with a keyboard on it

[@huntabadday2663]

Commodore 64

[@HainjeDAF]

Keyboard

[@Shiba643]

trs-80 model 100

[@spark-e]

Piano

[@tobitechboy1461]

Lg compact telephone thingy

[@customfreak81]

we actually had one of these for a while back in the 90's, my sister had a deaf friend at uni and brought a minicom back one summer so they could talk during the holidays

[@beachsandinspector]

Yes I had a number of these (similar) machines to repair many years ago, also had some deaf friends who I would communicate with using these devices.

[@retrobro_]

That's so cool

[@idj20]

Aaaah, speaking as someone who is born deaf, that takes me back. The minicom (which was given to me free by the health services) was revolutionary in terms of using the phone to keep in touch with other people in pre-internet times. I recall it used the TTY signal for sending data from one minicom to another and the "telephony" software on Windows 98 and a 56k modem just happened to be compatible with minicoms. It was handy but it wasn't that long before SMS texting took over as the standard means of keeping in touch with my deaf chums. What I do remember with using a minicom was that it was considered "good manners" to type SKSKSK to properly close the conversation, in fact I know a couple of deaf friends who still do that in Facebook messaging out of habit!

[@joe-e-geo]

What does sksk stand for??

[@unsoundmethodology]

@@joe-e-geo The Morse code pro-sign SK (S and K without the pause) is the code for "end of transmission", considered an abbreviation for "Silent Key". I'd assume that's where the Baudot use came from. (Not coincidentally, "Silent Key" is radio ham slang for someone whose telegraph key had gone permanently silent, i.e., someone who's passed away.)

[@chriskohanek]

@@unsoundmethodology I learned this as Stop Keying, but I always thought of this as 'Popeye the Sailor Man' or . . . _ . _

[@chriskohanek]

Telephone Devices for the Deaf (TDD) were everywhere at my university RIT in Rochester NY where ~1 in 10 students are deaf. The deaf user could watch the signal light to see the ringing sound, which then changes to a flicker when someone speaks. They would tap the space bar once or twice to announce they are using the TDD and the hearing person should connect to the TDD. In addition to the convention that you type 'SKSK' at the end of a conversation, you let someone know it is their turn to type by typing 'GA' at the end of your sentence for 'Go Ahead'. This only works if one person types at a time.

[@idj20]

That's the one with the GA! I've been trying to remember the other "keyword" with using a minicom, it was like our own version of saying "over".

[@platypushatstand]

“Going down these rabbit holes” - this is what makes your channel unique - as it leads to more fabulousness - so please don’t stop 👍🏻👏🏻❤️

[@screwbles5697]

This is honestly one of only two or three channels that I have seriously considered becoming a patreon of. So much unexpected, fascinating content.

[@oPossum5150]

The light bulb that was missing is used to indicate when the telephone line is ringing.

[@toadelevator]

He'll definitely need to get that bulb then! I KNEW there was some simple explanation I was missing : )

[@spazmobot]

And the important message rang out across the desk.... "I'd love a pint." Always cool, that stuff you do...

[@cottonfoo]

I'm old enough (nearly 50) to have spent some time in old Strowger BT exchanges, mostly at Hatch End and Pinner. The noise, the smell, it was glorious, my step-dad Graham took me around and showed me everything and explained how it worked. Also how "taps" worked and were applied, and if they discovered one they were told to just ignore it :) When Hatch End went digital the entire floor of switches was replaced with one smallish box on the side of the room and it was silent.

[@seoverus7805]

I love reading the comments off all the deaf folks & family members. I know those used to this think nothing of it but I am still moved deeply in my heart to read the stories. The incredible talent of LMNC is like a Universal language of discovery and its wonderful this channel is building community for all. Its A rare & healthy achievement that brings hope and works against the current fear & propaganda.

[@deblauweschicht]

I remember these gadgets well. My parents are both deaf and imported a small number of them in the early 80's from the USA to the Netherlands where we live. Those two keys on either side of the space bar that are marked "GA" and "SK" actually produce those two-letter combinations. GA stands for "Go Ahead", to indicate that the other side can now start typing, and SK stands for "Stop Keying", meaning that the conversation is over. The equivalents of respectively "over" and "out". Enjoyed hearing those bleeps again after 30+ years!

[@aminorjourney]

My late sister was profoundly deaf. I remember using these to talk to her when I was at music college in the late 90s in London. Mum and dad had a teletype 5000 at home, and my sister made sure everyone had one. But I was in halls at GSMD so didn’t have one at first, In my first year of college, before I had my own place (and before I purchased a Nokia communicator with all my pennies to call my sister on text that way) I used to have to walk down to Liverpool St Station in London to use the two pay phones that had one attached. They were really unreliable and hidden inside a stainless steel case with terrible keyboard. Man they sucked! You used to type your message and then “GA” to let the other person know it was their turn. To sign off both parties typed “sksk” after their final message to let each other know it was time to hang up. The teletype service is still operational afaik and many hard of hearing people still use them (although most people now just use text messaging). If you were really posh you had one with a text answering machine that would answer the phone for you and take a message! Love what you’re doing here. So glad I’m a Patreon :)

[@_00FF00]

TTY is still a thing in the States but has been largely replaced by SMS/text messaging. 911 call centers still regularly do TTY drills.

[@joe-e-geo]

Would GA = go ahead?? What the heck would sksk stand for?

[@_00FF00]

@@joe-e-geo If I remember right, it was an old morse code shorthand basically saying "end of contact."

[@aminorjourney]

@@joe-e-geo GA does mean “Go Ahead” and SKSK means “Stop Keying”

[@2.7petabytes]

Sam, I REALLY appreciate all that you do! You should most definitely be proud of all you have achieved! I would love to visit the museum sometime!

[@BeTheAeroplane]

"What are you doing, honey?" "Nothing important. I'm just paying long distance fees to call up the UK and listen to 1000 oscillators scream!"

[@rarbiart]

Money well spent!

[@suddenshotty]

Gotta use these free international calls on something decent

[@superotterboy7937]

This is bloody amazing! I geeked out when you started typing on one and trasnmitting to the other via the exchange. Dude, never apologize for going down a rabbit hole if this is the result. This technology is beautiful! Had no idea it even existed! Thanks for showing it!

[@OCSynthesis]

I work for a company called ULTRA TEC (supplying fiber optic polishers, semiconductor prep tool and (I suppose) telephony-related gear) Even to this day we still get one or two calls every week from customers wanting parts for their old ‘Ultratec Minicoms ’. Parts that my company has never made. These calls may very increase again if you start bringing in attention to them… arghhh! Great video, Sam!

[@thomasvnl]

So nice that it even supports the backspace over the line

[@MattBoyceDrawing]

We still have one of these my parents are Deaf, you could use it to talk to each other or you call a relay service (type talk) to make a voice call on behalf of the Minicom user. At the end of a sentence you'd write GA (go ahead) to let the other person know it's there turn to write.

[@portcherish]

you beat me here ! I remember they would use GA and PLS HLD a lot, I would call the TTY interpreters when I was away from home so I could talk to my parents.

[@bricelory9534]

I absolutely love the idea of calling an instrument. That's just brilliant!

[@manicmasterofmetal2620]

Sam goes down the rabbit hole and accidently discovers anti gravity and time travel... then he discovers just how deep the rabbit hole goes. Love the channel.

[@rickschrager]

TTYs! Those bring back memories. These were in every household that had a deaf person. In mine it was my step daughter. Here in the US we also had TTY operators that were go betweens the deaf and the hearing sort of like TTY translators. Fun!

[@JohnSmith-jl3fm]

I'm 43 and every time you venture down the rabbit hole you find more interesting things. Like watching 70s documentaries when the BBC actually done good educational programmes. Keep up the good work.😁👍

[@nathanpratt3058]

I love the sound of them so much, it's what I think of when I think of telecommunications

[@8bitwiz_]

Very nice. I like how the tones time out so that it doesn't scream in your ear all the time like a regular modem. In the states these are officially called a Telephone Device for the Deaf, or TDD. I have two Ultratecs an Ameriphone and one of another brand I can't remember even though I just checked them. As usual they're on the pile of "stuff I should mess with someday not until I can do it right because I don't want more half-opened stuff with missing screws". But the one thing I can tell you is that the plastic door between the phone cups is where the optional receipt printer goes. According to check boxes on the product label, there was also an ASCII version. I have a feeling they sold a lot more Baudot versions. I certainly can't resist a mechanical keyboard though! Got to hack my own code for them or at least set them up as proper wired terminals.

[@nodeswitch]

Used to support these in a job a bunch of years back. There was an optional printer you could add to the slot that lifts between the I/O that would print off the transcript. Pretty cool!

[@retrobro_]

This is amazing! They should still make these, it's way faster and more fun than texting! I also can't believe you can do a backspace, how cool.... I WANT ONE

[@3DPDK]

If you look at the code sheet you'll see that there are several "command" codes; like 11110 rings the bell and 01000 is a carriage return. This code was developed for teletype machines like the ones shown at 5:40. These were basically automatic type-writers that used the code to type out hard copy. The back space is a weird one because on a type-writer a back space does not erase the previous letter. It's normally used to double strike a letter making it bolder than the rest.

[@pflick13]

It only took 13 minutes to expand my mind! Incredible...

[@Luchoedge]

This is so retro-futuristic.. I LOVE IT!!!!

[@xpndblhero5170]

11:09 - I love how you can hear him in the background typing like he's playing a synthesizer.... You can hear the space bar SMACK from across the whole museum. 🤣🤣 That sound brinme back to my youth when I was kicked off the phones because I hacked my school computer system through the old phone line by hooking up a switchboard w/ a small piece of wire then calling in from outside the school and playing a specific "tone" over the phone then hooking up to a small computer w/ a small device like this... It took 3 months for them to figure out how I did it but then they also let me fix a dial-up problem w/ the phone lines in the school so they kind of helped me learn how to do it. 😂

[@DanBowkley]

Please never stop diving down rabbit holes and taking us with you.

[@rootsquare]

Cool, we used to use minicoms in a London Social Services dept back in the mid 90s to talk to customers. I loved them.

[@retrobro_]

Very fascinating rabbit hole, my good sir

[@derekchristenson5711]

I remember these devices! They're called "TDD" = "Telecommunications Device for the Deaf", as I recall. I even saw them in phone booths now and again, on into the early 2000's. As payphones disappeared, I figured that even the deaf had switched entirely to smartphones, and such dedicated TDD's had become completely obsolete, as anyone -- deaf or not -- could send SMS texts. Fascinating things, though! I vaguely remember reading that, if you didn't have one and wanted to call someone using a TDD, you could use a computer + modem, with your terminal software configured as a simple teletype terminal. A friend and I experimented with it once between our houses, but since we were both using computers + modems, and neither of us knew anyone who used a real TDD, that's as far as it got. This was circa 2000.

[@ChipGuy]

I remember hearing these tones on the shortwave radio band a lot.

[@TheBananaPlug]

RTTY

[@TheFujac]

is that what it was? 7 year old me always assumed i was listening to ships

[@ChipGuy]

@@TheFujac That might well have been the case. German Wikipedia states that ships still use the frequencies 4177,5 kHz 6268,0 kHz 8376,0 kHz 12520,0 kHz and 16895 kHz for this communication (Telex). But today they use more 1.6 GHz Immarsat and others

[@spugintrntl]

They're still there! I got an old shortwave receiver a couple years ago and I pick up these signals all the time. Didn't make the connection of what they were till I read your comment though. Super cool!

[@TheFujac]

@@ChipGuy ha!! that's awesome to know!!

[@huntabadday2663]

Now you gotta get a couple 60s mainframe systems

[@blaisebaileyfinnegan]

It's Look Mum NO Computer. That said, an analog or hybrid computer would be cool.

[@LumaControl]

@@blaisebaileyfinnegan Facom 128 replica? :)

[@huntabadday2663]

@@LumaControl Yeah, that will also give Sam A chance to collect the later telephone exchange modules too

[@midwestnobody8531]

That green phone is a beauty

[@Kelmerduser]

Thanks for your videos ! Everytime you put a smile on my face !

[@oldguy9051]

8:47 The copyright is from "80/82", the chip used is actually an "80C31 microcontroller" which wasn't made by Intel but in license by Matra Harris Semiconductors ("MHS").

[@FreazyTek]

So it's basically a chatbox pre internet,that's so awesome!!

[@charlespatt]

Reminds me of the Texas Instruments Silent 700 terminal. They used acousticly coupled 300 baud modems and had a built in printer. Back in 1984 i used one to program the Siemens SD192-MX PBX.

[@nbarrager]

They had one of these in the airport in Flint, MI and whenever my mom and I would go up there to see family I'd play with it while we waited for baggage claim. Never knew what it was for, but I figured it was for business people to send computer data over the phone. It was at a self serve kiosk for I think either a rental car place or a hotel chain. I spent a lot of time doing what you were doing at 4:18.

[@boelwerkr]

The sound brings back memories. My grandfather had a radio receiver with a really wide range. I would tune it to satellite signals and everything wired. There where a lot of this type of signals in the 80th. I had cassette recordings of some of them for a long time. Back then i didn't know what the signals meant. I identified and decoded some of them 15 years later. Some partial weather maps and status texts from oil platforms in the north see.

[@Rebar77_real]

That's cool how it backspaces on the other machine too.

[@arjovenzia]

Awesome, you still hear TTY on the amateur radio bands all the time. Its a bit archaic, but if there is one thing hams love its doing cool things with awesome old tech. being such a common standard, when you do get some public facing phone lines, it would be super neat to just have one of these open to call into. Ive used phone apps to decode RTTY audio, so should be quite accessible. its better done with proper hardware in your actual computer, but thats not the point here. Best of luck finding a proper mechanical TeleTypewriter. I geeked out so hard on curiousmarc's videos on them, they are insane bits of engineering. cheers lad. would love to sink a few pints with ya

[@lo-firobotboy7112]

"I should do a video about something a little bit weird...." haha...that describes most of your creations. (it's why I love your channel)

[@stephenc6648]

Although the acoustic coupler on top makes these things look like an 80s artifact, the fact that the Peterborough code is given as 01733 and not 0733 shows that it must date from 1995 or later. There used to be text relay services which enabled users to type and read conversations with a human operator translating in either direction. If you received a call from a user, it could be a bit disconcerting because you had to realise that you weren't really conversing with the operator but with the person typing and reading messages at the other end.

[@LOOKMUMNOCOMPUTER]

This was 1996 but these were one of the last of these items they had been rebranded but stayed largely the same since early 890’s

[@TheMason76]

Thank you so much .... You have brought back a long long ago memory. As I saw your video i noticed the Electronic Lab kit you have in the background. I had a similar Kit. So i googled a bit and i found exactly the Kit i had as a child including the Manual. While poking around in the manual i felt like this 9-11 year old boy i was when experimenting with electronics .... Thanks !

[@def_not_dan]

Wow, backspace works too. That's great.

[@thomasmartin7524]

That’s so wonderful! Thanks for that! Brighten up my Monday.

[@fuzzpope]

Absolutely brilliant, you are a living legend.

[@dykodesigns]

The rabbit hole goes even deeper, the frequently shift keying was also used by the kansas city standard. It was a standard for loading software from cassette tapes. The BBC micro and the MSX used it, at a baudrate of 1500 baud. If you play a computer cassette it sounds like a dial up modem.

[@sonicase]

cool, I have one of these...the lightbulb thing is a flash so a deaf person can see that the phone is ringing....it would be cool if you had a number we could call in and talk with out TTYs

[@bf0189]

I'd love a collaboration with CuriousMarc. Very interesting equipment he has.....

[@gameboydmg-0014]

2:09 nice to know someone else as awesome as you lived in Peterborough as well

[@CausticCatastrophe]

looking forward to the teletype rabbit hole!

[@sondrayork6317]

what you're displaying there is a TTY unit, those are used by the deaf and hard of hearing. our camp has one up in the main lodge. I've seen it being used.

[@pauljs75]

Stuff similar to that is still used for things like maritime weather reports, and random chats by HAM radio hobbyists. If finding those channels on the radio, it's pretty much the same FSK tones too. Some of the WebSDR sites you can find online (easiest example to play a bit with without having to get some kit yourself) will have a panel that can help decode it, provided the right settings are used.

[@davidpiper3652]

Takes me back to the early 1980s, I was using a Creed 7 teleprinter on ham Radio. I also had a deaf friend who had one of these acoustically coupled type machines, and I was able to use my Teleprinter and audio decoder to chat to him over the phone. I also did a lot of work in the RAF using teleprinters. It's nice to see the old kit again.

[@joshuaosterhout]

Secretly, there is a tiny mario in each one absolutely beating the crap out of a coin block. Each coin is a one.

[@michaelfarrellsmith]

Walked across the U.S. with a charity hike in 2001, and we used these to send emails and update our website from payphones. Still an unbelievable technology to me. It turns text into sound?!

[@tommiewouters946]

Thanks for this. Made my day. Never seen this before. This is one of the best KZbin Channels out there.

[@JahBeatSoundSystem]

Love retro electronics

[@HappyBeezerStudios]

And here in Germany we built our own acoustic couplers because licensed modems were damn expensive. Made from the plumbing section it was known as "Datenklo" (literally "data toilet")

[@patprop74]

Again super interesting.it's always fun to discover old tech with you.

[@ninjalo333]

All I can say is... SO F****N COOL!

[@jerobarraco]

'Im typing with my whistle' Captain crunch would be proud of you.

[@PH03N1X0M3G4]

The light socket looks like an 1156. We use them for RV's/campers and the like here in the states. (12V) Sylvania makes one that is LED-based with a LIFETIME WARRANTY. Hope this helps

[@buckstarchaser2376]

That was a better demonstration than when they were not obsolete. If you can find someone with a saxophone, perhaps you could do a re-do of Secret Life of Machines.

[@jameshamaker9321]

Incredibly entertaining, as well as very amusing. I live for content like this.

[@rika8484]

Hey neat, I work for an Ultratec company! Thanks for sharing this!

[@DouglasFish]

@CuriousMarc is a rabbit hole legend. We need you get you some HP gear and some fancy pants!

[@unsoundmethodology]

Very cool! I've got a Minicomm or two in storage somewhere; I picked them up from thrift stores years ago. I need to give them another look. (I grabbed them out of general technodesire, but I'd been thinking of them since a deaf friend had stayed with us for a visit a year or two before.)

[@Misteraitch1967]

Woah now that takes me back a bit...one spent many a year making phone calls for one's deaf relatives using one of these. One still has the mobile nokia communicator version too.

[@marknesselhaus4376]

Oh man, Acoustic modems was the main way to go back in the 70's and into the 80's. Yes my first modem was acoustic so that tells my age a bit :-)

[@Tech-NO-City]

I do all kinds of digital stuff with ham radio. You can use a PC sound card as a modem and hook it to a radio use the AX.25 protocol and bang internet over a analog radio. RTTY and PSK31 there are many other digital modes that work using a sound card. Lots of things use FSK like your wifi router, digital police radio (DMR digital mobile radio) P25.

[@x0rZ15t]

Fantastic piece of technology right there! Thank you for sharing this!

[@oscarmarsh29]

You gave the initials RNII in the video when describing the box label. It's actually RNID, or Royal National Institute for Deaf People, a charity that was until recently known as Action on Hearing Loss. They have since re-rebranded back to RNID.

[@briero]

I love this! I’ve worked in IT and I’ve only found the origin of Baud rate from this. Have a play with putting your lyrics through this and have the sounds this produces as a rhythm track. What’s the worst that could happen?! 😃

[@glenesis]

Brilliant plan, Sam! Cheers!

[@glenesis]

When I was in High School we had a Teletyper terminal and we learned how to use it to talk to a mainframe that lived in another town. We had a coupler phone modem, too! That was the year 1980. I learned a lot of Computer Science at a young age, but never learned about that 150 year old code! Thanks for the lesson :) Have a great day bro.

[@audiounlimited1963]

Dam, this is amazing! You see that stamp, Ultratec? They're the parent company that produces the Captel phone, produced here in Madison wi. My partner works their tech support line 👍

[@rbrooks2007]

"Greetings professor Falken, you are a hard man to find." - out the window the auto-coupler goes. We used to have rolls of that punched (ticker) tape for college projects but it seemed more useful as party bunting.

[@kamenninov1405]

This is a museum back there! Love it! I am a collector of vtg stuff myself

[@Wenlocktvdx]

I had a deaf friend at the radio club back in the 80s, also when I was working in South Melbourne there were several deaf people working in my area. I become very aware of these machines. Being a radio ham and having built my own RTTY (radioteletype) modem for use on radio. I also noticed how similar the minicom is to the RTTY gear. Hams began using teletypers or teletypes with a modem back in the 20s and progressed to computers in the 70s. My deaf friend would use a RTTY program for the Tandy Color Computer and an acoustic coupler (just the cups, not a modem). The baud rate is actually 45.45 baud, so unless the teletyper was already adjusted to 45.45 it will be running at the commercial speed of 50 baud. I used to listen to the RTTY Night Owl Theatre on Wednesday nights in Melbourne and printed out the text pictures they sent. The most popular machine was he Siemens Model 100. If you get one, remember to disable the answerback drum, sending Figs G will cause the drum to send a message which is set with pins inserted in the drum. On the Siemens you just lift one bar so it doesn’t trigger the drum.

[@LOOKMUMNOCOMPUTER]

yep. these automatically go to 45.5 or you say 45.45. whatever it is just doing what it said on the manual. UK defaults to 45.5 apparently. itdoes have an option to switch to 50 and also other codes.cool thanks

[@Wenlocktvdx]

These machines are known as TTY in Australia rather than minicom. 0.05 baud probably won’t be an issue, just adjust the machines motor speed to give to give consistent copy over a long period of time. The common test signal is series of RYs (RYRYRYRYRY) which gives an alternating bit pattern. Sometimes called Ridges due to the way it looks on an oscilloscope. Due to playing with RTTY the sound is like music to my ears.

[@alexanderthomas2660]

2:22: you should save that for breakfast. If it doesn't go down well, try flushing it with the contents of a lava lamp or a snow globe.

[@G7OEA]

The kit was provided by the RNID not RNII I used to work at a school for the deaf in southport. We had two of these. Which I had to repair form time to time. The cover in the middle could house a thermal printer to youbjad a record of the conversion. I used to have one at home to call the minicom number for companies that charged premium rates for calls.

[@eatshrots]

holy smoke, fudge me....this is such an exciting video because I got into acoustic couplers myself and got myself a Lear Siegler ADM-5 terminal a couple years ago. I was watching the Matrix and there was literally like a 3 second clip of this weird device where they took a handset from a phone and placed it on some dialer device and then Neo got to "wake up", you can find the clip on youtube by searching The Matrix - Awakening to the Nightmare That Is Reality. I got so interested to find out what that device was and all the sounds from the movie was the sounds of modems and I remembered my AOL days and using 56k and started digging into how modems worked and learned about acoustic couplers. Then I was dying to learn how Baud rate works and this is such a great video. I really need to fly out to England and see your museum. I'm a big synth lover even though I only have at the moment the reissue ARP 2600...(I had plenty others before) but damn this is so awesome I'm about to cry. I want to learn about that telephone exchange thing so bad! lol

[@ShortP1089]

microphone in the intro had contact with your chain, superb video as always, loving the rabbit hole

[@alex-go]

This is mindblowing! please, keep making videos like this one! :D

[@225Perfect]

I love the sounds these things make, including the clacky keyboards. Also just realized, I think anyway, that Pink Floyd used telephone exchange sounds in one of their songs.

[@binface9]

2:15 I've wanted to know this for some time, weirdly. I couldn't quite place the accent but I used to know someone from Corby so it's not a surprise.

[@howl3098]

I really love that keyboard. I'd love to see it taken apart to see what sort of switch it uses so that I may find them and build a separate keyboard out of them. They sound goooorgeous!!! Excited to see more telephony stuff! Especially the bit where you want to connect the Strowger exchange to the internet. Calling into the museum would be so cool! Keep it up!

[@Rayndalf]

My Minicom IV has black Cherry keycaps with doubleshot white legends but oddly enough they have adapters installed to mount the keycaps onto Alps SKFL switches. Other Minicoms used different keycaps and or switches.

[@the_real_hislordship]

If you slow the video down to 0.25 speed when those tones are playing at 7:10 region, you can hear they do sound different to each other.

[@noisetv1863]

I like the idea of being able to call up Kozmo and chat

[@TheBananaPlug]

These have a two tone AFSK signaling system similar to RTTY used by commercial and amateur radio ops. There is a video on You tube of one of these being used for this purpose, but I cannot find it just now.

[@Bullfrogerwytsch]

Super cool!

[@DavidHembrow]

I used an acoustic coupler for a short time. The circuit inside was remarkably simple, just a few transistors. The tx part was basically a vco connected to a comparator which had txd as input. Therefore ones resulted in a different frequency being generated than zeros. The baud rate was entirely determined by the equipment connected to the coupler. In practice that was either 110 or 300 baud.

[@DavidHembrow]

I also had a teletype for a bit. British Creed model. The serial to parallel conversation done by bits of metal was amazing.

[@2.7petabytes]

TTD device, we had one in a mall, at a pay phone when I worked at an entertainment complex called Exhilirama in the 90’s

[@mtalhakhalid1679]

wonderful to see such antique piece of equipment your place is full of wonder and awsome stuff yeh i used Arduino a lot and most sensors work on Serial this machine looks a lot like Morse code

[@charstringetje]

Sam is like a crossbreed between a dachshund and a ferret. No rabbithole on the British Island is safe.

[@redsquirrelftw]

Wow that's actually really cool. Also the sounds remind me of coins in the original Super Mario.

[@niniliumify]

Great find! Cat believe they are New In Box.

[@8bitwiz_]

It looks like what he has is a hotel pack, to loan out the units to guests who need them. So not new but complete.

[@3DPDK]

Well now I'm really feeling old. Equipment I worked on in the field for United Press International in the late 80s is being put into a museum, and some people watching look at this stuff like it's prehistoric wizardry. Holy crap, no wonder my beard is gray! Aah, but I have one up on the techs of today: Back then, especially as a field tech, you had to be a mechanic as well as an electronic tech. Be glad, young techs, you don't have to figure out what the platen is and how to replace the damn thing (without getting black carbon ink all over your tie and white shirt).