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From: email@example.com (John Crighton)
Subject: Re: Oscilloscope modification
Date: Tue, 19 Nov 2002 22:11:56 GMT
X-Newsreader: Forte Free Agent 1.21/32.243
On 18 Nov 2002 12:29:53 -0800, firstname.lastname@example.org
>I have an old Solartron CD1400 oscilloscope. This is a valve device,
>with plug-in X- and Y-units. The X-unit (CX1443) is a timebase
>generator and has an X-input as well. The unit works fine, but the
>x-input is of little use since it is capacitor coupled and not much
>gain is available.
>I have very limited knowledge of crt's, but my idea is to use one of
>the two Y-units (CX1441) as an X-amplifier. The output stages of the
>plug-ins are directly connected to the deflection plates. Would it be
>possible to simply connect the (differential) output of a Y-amplifier
>to the X-plates?
>Any comments would be appreciated.
>At this site there are schematics for the oscilloscope:
before you start to play make sure the brilliance is turned down and
not too bright. I ruined a brand new tube on a Cosser cro decades
ago while messing about.
If you remove the existing wires from the X plates and then have
a play connecting the X plates to whatever you have outside the
cro, I can't see any harm in that. Find out how many volts are
requied to move the "spot" so many centimetres.
Just check the DC level on the Y output before connecting to
the X plates to see if the spot is still going to be visible and not
deflected off the screen.
Let us know how you get on.
What are you trying to do when you say the X input is not of much use?
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