Re: "Double Pulse Generator"

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.