Gordon,
I'm in Swindon and will happily look at it using my 7104 scope, if
that is going to help.
Regards,
Norman
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Hi. I'm hoping someone in the UK can spare the time to give me a little
practical help with a pulse generator. I don't have leveled oscillators,
standardizers etc, and generally only very occasionally need high speed
stuff. 400MHz is 399MHz more than I need most of the time. I have a 7a13
with relay problems, more on that in another post. A decent pulse
generator should give me some indication of any problems with the
replacement relays. I've made one. The problem is I don't know how
decent it is, I just don't have the equipment. I've tweaked the vertical
amp in the 7834 (haven't touched L1667 as I can't mark its original
position easily) - pre tweak
post tweak
which looks like it's
just about in spec but for all I know I could be over compensating for
overshoot in the pulse generator
.
I'm guessing I'm probably not the only group member with a need for a
decent pulse generator. It uses two NC7SZ14 chips. One for the
oscillator which gives a trigger out before the pulse if you need it
(albeit inverted) and one for the output. If someone could test it and
if necessary tweak it I'd package it up and make the files available to
the group, either on here or maybe on OSH. No need to return the
generator. Just measure, tweak if necessary and provide results -
please:) 50 Ohms out by the way. Variable from ~0.5V to ~1V.
Cheers
Gordon
