Hello all, I have been fooling (emphasis on fool) with an old Heathkit 10 MHz two channel oscilloscope, which I believe was built in 1976 (it...

Hello all, I have been fooling (emphasis on fool) with an old Heathkit 10 MHz two channel oscilloscope, which I believe was built in 1976 (it was given to me several years ago). I have been able to calibrate the voltage on one channel, but not the other. Sometimes, after I have spent some time probing old pinball machine circuit boards using the one good channel, the voltage flakes ...

I recently built the JYE Tech DSO-150 Shell oscilloscope kit (#15001K) that I got from Banggood for $24 plus a power supply. These are...

I recently built the JYE Tech DSO-150 Shell oscilloscope kit (#15001K) that I got from Banggood for $24 plus a power supply. These are single-channel, low-frequency scopes, but would be useful for things one might do with an Arduino or similar microcontroller, such as stepper motors and servos, plus of course general audio stuff. The bandwidth spec is 200 kHz, but I suspect the display...

Hello, sorry if it is off-topic for this group, but I am urgently looking for the service manual for this device. Any help is...

Hello, sorry if it is off-topic for this group, but I am urgently looking for the service manual for this device. Any help is wellcome. Please email me. Thank you.

I have a 4500 watt generator that is for emergency use. When it was new I checked the output with an oscilloscope just to see how pure the sine...

I have a 4500 watt generator that is for emergency use. When it was new I checked the output with an oscilloscope just to see how pure the sine wave was and how close to 60 Hz it was. Well, the main sine wave looked good and the frequency was very close to 60 Hz. It floated around a little as the load changed but then would stabilize very close to 60Hz. However, there were lots of other small...

Many books told me that current leads voltage by 90 degrees in capacitor. So, I designed an experiment to show that it is true. You can do the...

Many books told me that current leads voltage by 90 degrees in capacitor. So, I designed an experiment to show that it is true. You can do the experiment at home or in the laboratory. Here is my experiment in youtube: https://www.youtube.com/watch?v=wjQsyLv0X7A