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Subject: Calibrating an old 'Telequipent D66 oscilloscope'

Date: 12/13/99
Posted by: G Shaw
E-mail: nospamghd54(at)dial(dot)pipex(dot)com(no spam)
URL: http://


Hi! 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 please?????

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