[Elecraft] 4 mHz oscillator mod

[Lyle Johnson]

> 75 -10TSQ10   10 pF   NPO
>
> The  75- 10TCCQ10  should also work.

Actually, they won't work.

The requirement is for a capacitor with a temperature curve of N750, which
is -750 parts per million per degree C.  This is not C0G, NPO, Y5V, Z5U,
R3L, SL, ...  if it doesn't state that it is N750, then it isn't.  N750,
N470 etc used to be quite common.  But that was a small number of decades
ago.

I've recently looked many places for caps like this.  No one I've found on
line seems to stock them.  A surplus place in Nebraska offers a few values
in ancient "dog bone" style parts.

If anyone finds an available source for temperature compensating caps,
please let me know!

73,

Lyle KK7P