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Re: Decades-Old DIY Sampler Mystery Solved

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Lawrence D’Oliveiro wrote:
...
> Worth noting that one of those typos was pointed out in the subsequent
> magazine issue, but it’s not clear that the other one was ever
> corrected. Without that fix, it’s hard to see how anyone could have
> successfully built the project. Did all those who failed simply chalk
> it up to their own (assumed) lack of ability?
>
> Imagine all those young, budding electronics engineers who were put
> off that career for life, because they couldn’t figure out how to get
> this thing working ...

  amazingly i built a model railroad control system back in the
mid-to later '70s from a series of articles in a magazine and it
worked.

  there were step-by-step instructions and measurements you took
at certain points to verify things worked.  i had it up and
running before i went away to college but the house it was all
set up in was sold when i was away at college so i ended up with
boxes of model railroad, parts for the engines, all the electronics
and things all packed together in a rather jumbled mess.  i don't
know if the guy i sold it all to ever used it and some years later
after he passed away his wife asked me to sell it for her and i
had my brother do it so i never set it all up again.

  as a description is that it was a fixed voltage on the rails so
you did not need to break the circuit into different parts and the
computer imposed a signal on that voltage that was picked up by
receivers in each engine you had going.  so you needed a controller
for each engine.  at most i had three engines running at once but
i think the overall capacity was more than that (enough that i
doubt i'd have been able to run them all due to current limitations.


  songbird

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Thread

Decades-Old DIY Sampler Mystery Solved Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-10 00:58 +0000
  Re: Decades-Old DIY Sampler Mystery Solved Theo <theom+news@chiark.greenend.org.uk> - 2025-11-11 16:59 +0000
    Re: Decades-Old DIY Sampler Mystery Solved rbowman <bowman@montana.com> - 2025-11-11 18:24 +0000
      Re: Decades-Old DIY Sampler Mystery Solved Theo <theom+news@chiark.greenend.org.uk> - 2025-11-11 22:08 +0000
        Re: Decades-Old DIY Sampler Mystery Solved rbowman <bowman@montana.com> - 2025-11-12 02:51 +0000
          Re: Decades-Old DIY Sampler Mystery Solved "Carlos E.R." <robin_listas@es.invalid> - 2025-11-12 10:52 +0100
            Re: Decades-Old DIY Sampler Mystery Solved Theo <theom+news@chiark.greenend.org.uk> - 2025-11-12 13:14 +0000
              Re: Decades-Old DIY Sampler Mystery Solved "Carlos E.R." <robin_listas@es.invalid> - 2025-11-13 18:47 +0100
        Re: Decades-Old DIY Sampler Mystery Solved "Carlos E.R." <robin_listas@es.invalid> - 2025-11-12 10:45 +0100
          Re: Decades-Old DIY Sampler Mystery Solved rbowman <bowman@montana.com> - 2025-11-12 18:47 +0000
  Re: Decades-Old DIY Sampler Mystery Solved "Carlos E.R." <robin_listas@es.invalid> - 2025-11-12 10:46 +0100
    Re: Decades-Old DIY Sampler Mystery Solved rbowman <bowman@montana.com> - 2025-11-12 18:40 +0000
      Re: Decades-Old DIY Sampler Mystery Solved John Ames <commodorejohn@gmail.com> - 2025-11-12 11:00 -0800
        Re: Decades-Old DIY Sampler Mystery Solved scott@alfter.diespammersdie.us (Scott Alfter) - 2025-11-12 23:22 +0000
          Re: Decades-Old DIY Sampler Mystery Solved "Carlos E.R." <robin_listas@es.invalid> - 2025-11-13 19:03 +0100
      Re: Decades-Old DIY Sampler Mystery Solved "Carlos E.R." <robin_listas@es.invalid> - 2025-11-13 18:52 +0100
  Re: Decades-Old DIY Sampler Mystery Solved songbird <songbird@anthive.com> - 2025-11-14 23:43 -0500
    Re: Decades-Old DIY Sampler Mystery Solved "Carlos E.R." <robin_listas@es.invalid> - 2025-11-15 14:54 +0100

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