At 04:22 PM 5/24/2004 -0700, Bob Blick wrote:

>> Twice Cl - parasitics.
>> Cl = 12.5 so your cap will probably work out to be about 20pF.
>
>That's how I have always figured it, but it doesn't like to start with the
>two 18 pF caps and 47k series resistor I started with. I paralleled 47pF
>on top of each cap, and it starts more reliably.

Ouch. Sounds like not enough gain in the loop.

Crystals aren't nearly as simple as we'd like them to be.

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