In article , Don Pearce
wrote:
On 12 Nov 2004 10:59:42 GMT, ohawker (Andy
Evans) wrote:

Go round to your mate who tests your amps for some driving lessons -
that'll be hundreds of times more effective than anything you can get
here.

It's his old scope!

Then he is the ideal person for the task.

:-)

BTW I agree with what Don has said about checking the scope.

You could also check that on DC its readings are consistent with your
voltmeter when they are both connected to, say, a battery at the same time.
This ensures that you aren't caught out by a drop in voltage in the scope
affecting the size of its test signal.

If you know the frequency of the test signal you can also look at it with
the scope triggered from the mains ('line'). This gives a rough check on
the frequency that should be good enough for general purposes, and can give
an approximate check of your time scale.

In a 'pro' lab I'd recommend getting a more serious calibration done. But
for normal day-to-day work what Don has outlined should be quite
satisfactory.

Slainte,

Jim

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