I came across this link: https://www.avx.com/docs/techinfo/mlc-tant.pdf ...
which points out that Y5V dielectric capacitors chance their effective
capacitance across about a 5:1 range depending on the DC basis. Has anyone
used this "feature" to obtain tuning in a radio? Similar to using a varactor
diode's capacitance for the same effect? I'm thinking that it might not work
as well as a varactor diode (especially given Y5V's very significant
temperature dependence), but it still seems like it could be a novel idea for
a low parts count receiver that didn't need particularly stable tuning.

---Joel Kolstad