[R-390] 100kc crystals and 50kc Cal Tones

[Tim Shoppa]

Roger writes:

> Some cap and resistor changes to move the multi vibrator time constant down 
> to a 50kc frequency from its 100kc frequency.

> Does any one have any parts values?

In the divide-by-two, doubling C313, C314 and C315 to about
470pF won't hurt any.

I believe that all this is documented in an ER from a decade or two
ago but I don't see it in the index.

Tim.