N
N_Cook
- Jan 1, 1970
- 0
One of those tiny barrel watch-size ones. Measured 13 ohms across the pins
before and after desoldering. Could not resist grinding the end off to have
a butchers'. Heat from grinding destroyed whatever ohmic path there was.
I've never looked inside one before. Tuning fork type form with 4 complex
tapering tracks, silver looking, on each face, under a x30 microscope.
Presumably silver migration/silver mica cap disease, only a few atoms
bridging a 100 micron gap between tracks to cause failure.
Previously I've come across ceramic resonator and filter failure due to
ohmic , presumed Ag migration .
The closure end with the wires, is the barrel swaged over a tiny paxolin
disc exactly like can type electrolytic capacitor.
before and after desoldering. Could not resist grinding the end off to have
a butchers'. Heat from grinding destroyed whatever ohmic path there was.
I've never looked inside one before. Tuning fork type form with 4 complex
tapering tracks, silver looking, on each face, under a x30 microscope.
Presumably silver migration/silver mica cap disease, only a few atoms
bridging a 100 micron gap between tracks to cause failure.
Previously I've come across ceramic resonator and filter failure due to
ohmic , presumed Ag migration .
The closure end with the wires, is the barrel swaged over a tiny paxolin
disc exactly like can type electrolytic capacitor.