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Subject: Calibrating an old 'Telequipent D66 oscilloscope'
Posted by: G Shaw
E-mail: nospamghd54(at)dial(dot)pipex(dot)com(no spam)
I have been given an old D66 oscilloscope.
The problem I am having is that I find it is out of calibration.
Can anyone help please? The amplitude calibration seems out.
I notice that there is a 500mv calibration output on the front, I have fed
this to the input channels, and displayed it, and found that one of the
selectors (0.1v) is very out. After opening the 'scope, I have found 2
silver boxes presumably for calibrating the 2 channels. There are variable
capacitors with 50mv 20mv, .2, .1 etc. I varied the 0.1 vari-cap and found
it to make no difference to the waveform on screen. How do I do this
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