At 7/12/2007 04:34, you wrote: >Denny, > >Often temps for temp stablization are higher than what is expected in the >enviorment of the radio/unit. Some use temps as high as 140 deg F and >some even higher. Since most time one would not expect the enviorment to >go higher than 140 so they artifically keep it this high.
I keep my xtals @ 120 °F. > Otherwise cooling would be required, hi. Theoretically possible using Peltier junctions, but would be difficult to implement inside an MVP exciter compartment due to the inefficiency of the Peltiers. OTOH stabilizing an xtal by cooling might greatly reduce the aging rate (why I only heat to 120 F: the lowest temperature I can achieve stabilization, as even that temp. sometimes causes noticeable aging acceleration). Bob NO6B
