>even a scope probe. The answer for me was to reduce the
>fan-out (which I assume is the problem and the probe just
>tips the balance) by using the 8 gates in two 4081s to split
>and buffer the clock signal from the PIC. A 74xx08 would
>be a TTL alternative

It's a capacitance thing exactly like with the MCLR thread. Add a fixed
capacitor (while assuring that there is enough fan-out with it on), and
your problems will be gone. The probe is 10p, adding even 47p will
probably fix the problem.

Peter

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