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  1. AHC: More bike paths prewar or just after WWII

    So the UK government had a plan that would have been good for cyclists and what if they didn't oppose it and restarted the bike programme as part of postwar reconstrutions?
  2. What if General Motors marketed the EV1 in Hawaii?

    So there is this channel called Big Car, and there are three videos on 20th-century electric cars... ...the third one is about the General Motors one: It seems that this electric car did have enough range for use in Hawaii, where "driving for hours to get to the next city" is not possible...
  3. AHC:Pneumatic post and electric telegraph appearing together

    Do pneumatic post networks strike anyone here as being built after electrical telegraphy had become established? These systems did depend on the use of the technology behind the electrical telegraph so that the sender can tell the receiver that something is on its way and the receiver can tell...
  4. What if Bermuda were still carfree and maybe still had a railway?

    According to Bermuda-online and the Bermuda railway pages, Bermuda used to be car-free and also had a railway. Maybe if it had remained that way, Bermuda would be more bicycle friendly than Denmark, or even the Netherlands.
  5. What if Leonard Cohen had a head start?

    Leonard Cohen reached adulthood and chose to write poetry and novels at a time when it was unusual for singers to write their own songs. Not so long later, in 1962, the singer-songwriter was co-introduced by the Beatles and Bob Dylan. Now I know there were singer-songwriters before then, but...
  6. AHC on utility frequency

    The first thread I started on this site was on the war of currents, where I explored the idea on what might/would have been if rectifiers had appeared during the war of currents. I wondered if perhaps it would have ended differently if rectifiers had become available at that time. So this time...
  7. What if Sony made an extended play U-matic instead of Betamax?

    I have recently watched a two part video by Alec Watson on his Technology connections channel on why Betamax failed. In fact it failed harder than most people think. Part one explains that Beta began as a smaller version of U-matic. Whatever Sony did to get the same record time as U-matic in...
  8. AHC Downunder: Mainland Australian mainline railways standardise on 5'3''

    The first railway in this country was right here in Melbourne, between Melbourne town (now our CBD) and Sandridge (now a suburb called Port Melbourne). It was built to the track gauge mentioned above, also the track gauge used in Ireland. New South Wales originally agreed to build to this gauge...
  9. If Montreal had kept its streetcars

    Today is the first anniversary of the death of Leonard Cohen, originally from Montreal. When he was growing up, there was an extensive tramway network on the Island of Montreal. Some lines had lots of reserved track and they even got a few PCCs in later years. What if these lines were put...
  10. Let Hans Asperger's work be translated at least 10 years earlier

    This is an important one for the autistic community. Hans Asperger wrote a lot of work in the 1940s, so suppose it were translated well before 1991.
  11. What if Paul Magès patented hydropneumatic suspension himself?

    Paul Magès was the inventor of the suspension system fitted to larger cars made by Citroën since 1955. Suppose that he patented it himself and licenced it out to various vehicle manufacturers instead of working for just one car company that had the rights to it.
  12. WI: Bicycle lifts appeared during the first bicycle

    The idea of a bicycle having been invented earlier has been discussed before, see: *Medieval bicycle *Earliest possible bicycle *WI: Leonardo da Vinci invents the bicycle? *What if bicycles were invented centuries earlier? *WI: Bicycle developed earlier? Another related technology, the bicycle...
  13. Widband telephone lines and faster dial-up connections

    Normal telephone lines have a bandwidth of something like 300Hz to 3,500Hz. This may have something to do with the technological constraints of the time that the public switched telephone network was implemented. Apparently, this limits dial-up connection to bulletin board system and the...
  14. What if floppy discs had serial copy management?

    Most of my alternate history threads are about scenarios where the divergence from real history happens in the pre-digital era. This has to do with being born in the wrong decade. Floppy discs are all digital, and when copied correctly, are copied bit-for-bit. The first floppies were introduced...
  15. AHC: Inside start grooving standard on microgroove records from the beginning

    Right from their introduction, it was standard practice to cut microgroove masters from tape sources. Suppose that they also had inside start grooving instead of outside start, being cut in reverse from master tapes. Have any of you noticed that albums originally released as L.P records have...
  16. Modulated tape bias in the analog era

    When sound was first recorded on magnetic tape, it was discovered that extreme distortion would occur due to an intrinsic property of magnetic tape called hysteresis. Did anyone at the time ever notice that the amount of distortion due to this varied according the amplitude and frequency...
  17. AHC: Television distributed by cable right from the beginning

    Has anyone here ever wondered why most television broadcasts in the world are distributed by radio waves, and originally all television broadcasts were? If you think about it's as follows; Unlike radio, television (actually the latter was called radio with pictures when it was developed) is not...
  18. A complete difference engine in the 1820s

    The first computer ever designed, a mechanical one, was designed by Charles Babbage. Called the difference engine. What if either the difference engine, analytical engine or even both had been completed?
  19. Colossus the code maker

    Colossus was the first programmable computer, and was built to crack the Lorenz cipher. What if Colossus, rather than being destroyed, had been used again as a code making computer?
  20. Code talking

    Navajo code was used in a battle against the Japanese in WWII and again in part of the Vietnam war. It was declassified in 1968. But what if it had remained classified at least until the end of the Vietnam war? What if the Argentines had used an equivalent in the Falklands war?
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