• "Double Pulse Generator"

    From Cursitor Doom@21:1/5 to All on Sun Sep 22 08:53:27 2024
    Gentlemen,

    Looking back through my stash of vintage test gear, I've uncovered
    something which describes itself as a double pulse generator. I'm
    going to hook it up to a scope to see what it actually does (if
    anything, after all these years). Now I know what a pulse is and what
    double means and what a generator does but I've not encountered such a
    device before. I'd be interested to learn from anyone who has,
    precisely what sort of application this device was intended for? I
    would have posted a pic, but hopefully someone will know without me
    having to go to the trouble.

    -CD

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  • From Liz Tuddenham@21:1/5 to Cursitor Doom on Sun Sep 22 09:04:29 2024
    Cursitor Doom <cd@notformail.com> wrote:

    Gentlemen,

    Looking back through my stash of vintage test gear, I've uncovered
    something which describes itself as a double pulse generator. I'm
    going to hook it up to a scope to see what it actually does (if
    anything, after all these years). Now I know what a pulse is and what
    double means and what a generator does but I've not encountered such a
    device before. I'd be interested to learn from anyone who has,
    precisely what sort of application this device was intended for? I
    would have posted a pic, but hopefully someone will know without me
    having to go to the trouble.

    I have one made by "Advance", most of the transistors are early
    germanium and (I vaguely remember) some avalanche devices to give sharp
    pulse edges. They were exotic specialised equipment used mainly in the nuclear and telecommunications industries.

    As far as I know, their main use was producing pairs of pulses close
    together to check that devices like Geiger counters weren't missing
    pulses due to latency. They could also generate test waveforms for
    video links.


    --
    ~ Liz Tuddenham ~
    (Remove the ".invalid"s and add ".co.uk" to reply)
    www.poppyrecords.co.uk

    --- SoupGate-Win32 v1.05
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  • From Cursitor Doom@21:1/5 to Liz Tuddenham on Sun Sep 22 09:10:38 2024
    On Sun, 22 Sep 2024 09:04:29 +0100, liz@poppyrecords.invalid.invalid
    (Liz Tuddenham) wrote:

    Cursitor Doom <cd@notformail.com> wrote:

    Gentlemen,

    Looking back through my stash of vintage test gear, I've uncovered
    something which describes itself as a double pulse generator. I'm
    going to hook it up to a scope to see what it actually does (if
    anything, after all these years). Now I know what a pulse is and what
    double means and what a generator does but I've not encountered such a
    device before. I'd be interested to learn from anyone who has,
    precisely what sort of application this device was intended for? I
    would have posted a pic, but hopefully someone will know without me
    having to go to the trouble.

    I have one made by "Advance", most of the transistors are early
    germanium and (I vaguely remember) some avalanche devices to give sharp
    pulse edges. They were exotic specialised equipment used mainly in the >nuclear and telecommunications industries.

    As far as I know, their main use was producing pairs of pulses close
    together to check that devices like Geiger counters weren't missing
    pulses due to latency. They could also generate test waveforms for
    video links.

    Wow. Thanks, Liz.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From piglet@21:1/5 to Cursitor Doom on Sun Sep 22 09:27:12 2024
    Cursitor Doom <cd@notformail.com> wrote:
    Gentlemen,

    Looking back through my stash of vintage test gear, I've uncovered
    something which describes itself as a double pulse generator. I'm
    going to hook it up to a scope to see what it actually does (if
    anything, after all these years). Now I know what a pulse is and what
    double means and what a generator does but I've not encountered such a
    device before. I'd be interested to learn from anyone who has,
    precisely what sort of application this device was intended for? I
    would have posted a pic, but hopefully someone will know without me
    having to go to the trouble.

    -CD


    I have a unit made by Lloyd Instruments England which looks like it dates
    from late 1970s/early eighties built using TTL chips. I bought it at a flea market intending to use for researching Weinberg topology switchers but so
    far I haven’t used it.

    --
    piglet

    --- SoupGate-Win32 v1.05
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  • From Cursitor Doom@21:1/5 to erichpwagner@hotmail.com on Sun Sep 22 13:30:21 2024
    On Sun, 22 Sep 2024 09:27:12 -0000 (UTC), piglet
    <erichpwagner@hotmail.com> wrote:

    Cursitor Doom <cd@notformail.com> wrote:
    Gentlemen,

    Looking back through my stash of vintage test gear, I've uncovered
    something which describes itself as a double pulse generator. I'm
    going to hook it up to a scope to see what it actually does (if
    anything, after all these years). Now I know what a pulse is and what
    double means and what a generator does but I've not encountered such a
    device before. I'd be interested to learn from anyone who has,
    precisely what sort of application this device was intended for? I
    would have posted a pic, but hopefully someone will know without me
    having to go to the trouble.

    -CD


    I have a unit made by Lloyd Instruments England which looks like it dates >from late 1970s/early eighties built using TTL chips. I bought it at a flea >market intending to use for researching Weinberg topology switchers but so >far I haven’t used it.

    Not heard of Lloyds Instruments, Piglet, but there were *many* small manufacturers of electronic test equipment back in those days. The one
    I have is made by Venner, also in England back in the late 1960s. I
    just plugged it in - throwing caution to the wind - and much to my
    surprise, it

    a) didn't blow up
    b) actually output pulses.

    Not bad for something that hasn't been used for *many* years (if not decades).The only fault I could find is that it's only putting out negative-going pulses, but that's probably just a dirty switch.
    Obviously there's a lot of noise when the controls are turned and
    switched in and out. That's only to be expected with vintage stuff
    that's been unused for so long.
    If you're into vintage equipment, I also discovered a R&S field
    strength meter from about the same era. Not sure how much of a market
    there is for any of this stuff nowadays, though. So many useful
    gadgets coming out of China it's made a lot of old gear obsolete.

    --- SoupGate-Win32 v1.05
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