[time-nuts] Fwd: HP5061B Versus HP5071 Cesium Line Frequencies

[Poul-Henning Kamp]

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In message <c8fbcbc0-8cbc-16be-f956-b729abdd1c3d at earthlink.net>, jimlux writes:


One final detail about TEC's which people usually don't have to
worry about, is that they're not happy about switching directions.

You generally end up with them mechanically tearing themselves apart
if you use them for mixed cooling/heating.

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