For reference, Ridge Equipment has a photo of one of this year's crop of
FE-5680A mounted to a large aluminum plate.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=330233071735
http://i43.tinypic.com/126cpcp.jpg
Leigh/WA5ZNU
Almost all rubidium standards DO specify the use of some form of a heat sink. For
the FRK and M100 units this can be a heat sink with around 1" fins or just
bolted to a metal plate or chassis.
The military freq standard that had M100's in them had the unit mounted to a 5x5x.2" aluminum plate that was in turn bolted to the chassis. My Efratom PTB-100 time bases for the Tektronix TM500 mainframes have a large heat sink mounted to a FRK style oscillator.
LPROs are supposed to be mounted to a metal chassis (they usually come with a
thermal pad attached to them). I have seen them lose lock in free air. I saw
one mounted in a piece of cell phone equipment. It was bolted to a large heat
sink that formed most of the front of the enclosure.
I have also seen FE-5680A's in their native habitat (again, cell phone equipment). They
were mounted to a thick (1/8"?) PCB around 6x16". The side of the PCB that the
5680 was bolted to had a solid ground plane. The 5650A's had one side bolted to a metal
chassis.
----------------------------------------
_________________________________________________________________
Hotmail® has ever-growing storage! Don’t worry about storage limits.
http://windowslive.com/Tutorial/Hotmail/Storage?ocid=TXT_TAGLM_WL_HM_Tutorial_Storage_062009
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
