CEM 3340 chip problems

[brad sanders]

>I have been testing the chips in a breadboard circuit. Some of the 
>chips   function perfectly but some seem to have problems. Some exhibit 
>non-periodic oscillation (noise) at some frequencies which varies as I 
>touch certain places in the circuit....

Not surprising. VCOs are designed to oscillate; they're doing just
that! If this is one of those "plug in" breadboards, I'm not surpised.
Some flavors of these may have a few hundred pF between runs.


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