Those 28s are really great machines. I was a tech at Western Union Telegdraph Co. for 27 years working on every model from 14 to 43. 28 was my favorite. We had hundreds of those in this area. Around 1980 when businesses really started using computers, They started getting away from Baudot systems and if they used printers at all, they went to model 33 and 35 printers so the computers could talk directly to the computer without any code conversion. So, the company started unloading the model 28s and the local hams had a bonanza. One bunch of hams here in this town bought a ;whole truckload of various 28s from our warehouse in the bay area at a very bargain price.
Such a deal! I wish I still had the one in that photo above, it was a sweetheart.
73,
John, K6YK
For those of you who mentioned PDP-11s, I went to school on those in about 1986 or so for 3 weeks. We had many of them in service doing various tasks. You have to know that they were sending teletype techs to school, guys with screwdrivers, wrenches, oil cans, etc. to fix compiuters!. All I can say is I dreaded every trouble call to a customer that had a PDP. And every call always turned out to be something other than the computer that was in trouble. WHEW !
K6YK
Yes but at least the newer stuff can be used any time of day 
My introduction to Amateur Radio was at 6th form college where one of the âRecreation Classesâ was Amateur Radio run by Eddie - G4KHG (some of the US guys might know the Name/Call as he was a major US county hunting fanatic)
G4WCR - Winstanley Colleg Radio
In the shack we had FT-DX400 for HF with a tribander on a mast at 60 feet. A 2m rig (no idea of make/model to a 5/8 over 5/8 colinear for 2m above the tri-bander (which blew off and snapped in the storm of 1987 and I took it home and repaired and was on my house for many years).
Also in there was a RTTY machine. A huge contraption that made a heck of a racket. From an image search it may have been a Teletype Corporation Machine Model 33. Whilst the radio room was open at anytime the college was open, the RTTY machine was only allowed to be switched on during lunch hours or after class. If anyone did turn it on outside those hours then you soon knew about it no matter where in the building you were
Once Eddie retired another licensed teacher took on the role, but with little money to replace/repair some of the older equipment it soon closed down. I have no idea what happened to the RTTY machine.
OK G7ADF, I know what you mean, sort of.
Yes, I knew Eddie, G4KHG. Worked him many times on the air when I was couinty-hunting and met him at a county hunters convention once in the 1990s.
Model 32 and 33 machines were noisy for sure, and many of our customers bought silencing covers for them which helped a lot.
I did a job on my 28, I padded the entire inside of the cabinet with foam rubber including as much as I could glue to the lid without interfering with the machines workings. And I put as light of a spring on the type hammer as I could and still have it
type readably on the paper. Also adjusted the main drive gear so it was as quiet as
possible. All those things helped a lot. My hamshack is in the house and those printers woiuld automatically start and stop as traffic came in, and I got few complaints from the XYL. (She was a former Western Union teleype operator (known at the time as an âAutomatic Operatorâ meaning she was not a Morse Telegraph Operator.) and she didnât really like the things!).
JL
Nostalgia ainât what it used to be.
I started computing with an ASR-33 teletype at school linked over the phone to Hatfield Polytechnicâs (now University of Hertfordshire) DEC machines (one just did BASIC and the other was a DECSystem 10 I think which allowed other languages such as Fortran). At home I had a Science of Cambridge MK14 (Sinclairâs first computer, before the ZX80), then a Compukit UK101 (clone of the American Superboard) and then a BBC Micro.
I think itâs more fun now. Iâve got a Raspberry Pi 5 on which I develop Rust code for a Pi Pico 2 which is doing DSP for my SDR RX. The editor is on my Windows 11 machine. The ARM microcontroller costs about a dollar and is way more powerful than any of those early home computers. Iâm currently playing about with the PIO and DMA to add I2S output to a DAC chip.
Iâve just come back from a few days in Paris. On my phone I had the app to buy and hold the travelcard touching in to the Metro and bus. I could check on Google maps where I was and how to get to where I was going. All payments were contactless on the phone.
This is all much more fun than those early machines.
Berlin is similar to that when I was there last year. Good transport network there and decent tech infrastructure behind it.
I tried to clone an EI travelcard but it uses a different version of Mifare you couldnât easily clone to hold on your own wallet, which is obvious and fair enough of course.
An app or rotating QR system would be good though. Probably not far behind.