eagle1109
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I think the LCD started to come out before 10 years. So I think 1990s was the time of CRT monitors.
My question is what they used 35 years old capacitors on 10 years CRT monitors?
Did they manufactures these capacitors before 35 years and kept them in electronics parts warehouse, then sod it to CRT manufacturers? Or the technology the these capacitors is old, and they manufactured the capacitors in the 1990s around the time of manufacturing the CRT monitors?
Switching supplies in TV's often go into a hick-up mode for protection if there is an excessive load due to a fault somewhere.
In line with post #2, hiccup mode is liable to drop the frequency down into a slower range, which could explain audible noises coming from the inductor.
Is the earth on the CRT, is could be a corona discharge due to leakge somewhere.
Frank
Having been Mfg Eng Mgr at C-MAC we had many "Universal" brand thru-hole part stuffing machines that could handle these parts. We also had different adapters for larger axial parts and a different machine for radial parts in addition to many SMT lines.
My guess is the parts permitted those shops which only had one style of auto insertion handlers for the tape and reel mounted operation for lead bending, insertion, cutting and clinching of 0.3" body axial parts into 0.5" pitch holes. This makes it convenient for low cost manufacturing. These capacitors could easiliy have a large breakdown voltage , suitable for some CRT applications in a monolithic epoxy package, as opposed to larger value Multilayer ceramic caps, which have low voltage ratings<< 500V.
You can still get axial monolithic capacitors of any value and voltage rating, which is all you need to match. Unless it shorted out internally with signs of fatigue, I would not expect this part to fail. How would you classify it's failure mode? electrical or mechanical?
However you may choose a radial just as well as axial and most likely it will be an epoxy coated ceramic bead capacitor rather than a molded epoxy with a cylindrical body. Cost in high volume to purchase is about $0.005 but to buy one only is anyone's guess.