Re: 5116+5D10 intensity problem
You definitely want to look into one of two things, either bad/reduced high voltage (symptoms would be magnified deflection because a slower electron stream is easier to deflect), and then the cathode/grid bias, but right now, I'm betting on the high voltage.toggle quoted messageShow quoted text
I wouldn't change the horizontal or vertical gain, but I'd check the outputs of the amplifiers for normal signal levels. I seem to remember that when the 5000 series was mentioned, there may have been some problems with an epoxy coated HV transformer, which may need to be replaced. However, I'd check the HV oscillator circuit to see what's going on there. If, for instance, there is an HV multiplier block (possible), feeding a separate accellerator, then failure of that block causes the image to bloom.
I'd suggest doing a search on the group archives for scope HV problems, which shows the steps you can take to troubleshoot the system. You do need an HV probe. It should be specified to work with the meter impedance you have, since it's a 1000 to 1 high voltage divider using the meter itself as the lower part. 10 meg meter needs 9990 meg resistive divider.
You might want to check the discussions on those, too, for additional information
On 2/16/2020 2:46 AM, Yeun-Jung Wu wrote: