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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 ...
It's not practical I know, but I thought it would be fun. A 200 LED oscilloscope as a good soldering project for low speed, simple projects etc, ie: 555 projects. Easy I thought, use the LM3914 to drive the ten vertical 10 LEDS while the two 4017s to handle the twenty horizontal LEDS in a 10x20...
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