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Hi
I got this analog, 2 channel 20 MHz, very old oscilloscope.
Problem is that Variable knob(sometimes called CAL on Tektronix) affects the vertical position of the signal beam.
I demonstrate it in the video
Any ideas where to start looking ?
Here is the schematic for this oscilloscope ...
(Also posted to AAC.)
I am building an Arduino-controlled remote L-C antenna tuning network with a motorized inductor and capacitor on a common shaft. I have a 99uH roller-inductor that takes 20 revolutions of a 0.25" shaft to adjust the inductance from ~1uH to 99uH. Total travel of the shaft...
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