Those caps are indeed quite a bit newer than the radio most likely of late 50 s 70 s vintage.
Ceramic dielectric coupling.
Wan 0176 w december 2005 rev 1 0 3 figure 2 ceramic capacitance vs.
Recommended for use with fresh water and petroleum products.
Provides dielectric protection from corrosion between dissimilar metal piping.
Do not use with salt water.
Capacitors are fundamental components.
Ceramic capacitors especially multilayer ceramic capacitors.
Lasco 17 9299 3 4 inch brass female pipe thread by 3 4 inch steel female pipe thread di electric union.
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This article describes the building code and practical requirements for a dielectric fitting when connecting copper piping to steel pipes or steel fittings such as at the top of a water heater.
Class 2 ceramic capacitors offer high volumetric efficiency for buffer by pass and coupling applications.
The capacitance value also depends on the applied voltage.
Standard wall galvanized steel pipe nipples and pipe for joining dissimilar metals.
Inner dielectric element is a threaded thermosetting plastic laminate.
In later years starting some time in the 1950 s many manufacturers used ceramic caps as oem in both radios and tv s in the audio circuits and they worked just fine.
Cadmium plated steel body.
All kinds of capacitors you need in just one place.
Class description common types.
Simon ndiritu from general dielectrics explains some basic capacitor selection guide for coupling and decoupling applications.
These ceramic capacitors offer a high level of stability and exhibit low loss levels and they are ideal for use in resonant circuits.
Bias voltage figure 2 shows 1µf 16v 0805 capacitors and how their capacitances vary with voltage.