In article ,
Alan Peake wrote:

Andrew, do you know what the thermal conductivity of beeswax is?
Alan


Nope. Is it remotely relevant to this application?

Andrew VK3BFA

It could be. One problem with temperature compensation is that the
various components of an oscillator have differing thermal masses,
thermal conductivities and hence thermal time constants. So it helps to
have everything thermally connected so all component values change at
the same rate.
If beeswax conducts heat well, then potting the oscillator with it would
assist temperature stability.
Alan



The beeswax also stabilizes the components so they don't vibrate for
whatever reason. Vibrations can induce changes in values for susceptible
components resulting in modulation of the output frequency.

Al