> The real problem with the freezer method, or ice cube is that the ice
> cube is at the same temp as the freezer and that is only 10 to 20
> degrees. Most freezers are not much cooler than that. and a deep
> freezer is only about 5 degrees.  (Also to much water and moisture).

But, I only wanted to see how it progressed...  You know that most
variations cased by temperature follow
very predicrable curbes, and thus I know that if it only dropped a few kHz
during a 50c drop, I won't get any surprises when it drops a few more deg.

> The best method is to go a local office supply store, and buy canned
> air. The type to blow out the key board or just to blow out the inside
> of sensitive electronics as the ads state. Turn it upside down and
> spray the propellant. (-20 to -30 degrees) be care of frost byte. (I'm
> serious) Spray it directly onto the board or just barely pull the
> trigger to drip the liquid onto a single part. (You can also find an
> intermittent connection real fast. ) I have placed a circuit board
> into an insulated freezer bag, then blasted a can of canned air
> (upside down) into the bag closed it for a half hour, opened the bad
> to measure the temp at -10 degrees. The board is good and soaked then.

The propellant of canned air is just that... canned air.
But, yes.  By holding the can upside-down you get the liquid air, not the
gas-version.  That has a lot more expansion potential and draws a lot of
energy when it expands.

I have access to freezing spray also.  It is used in the air-industry to
remove gum from airplane seats.

Anyway...  The internal oscillator was remarkably stable.

    Kyrre

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