[time-nuts] A fan for the Z3801A

[SAIDJACK at aol.com]

Hello Murray,
 
moving air also affects the DAC and voltage reference, so while your OCXO  
may perform flawlessly, the EFC voltage can vary.
 
For example capacitors have a thermal voltage on them, Elkos more so  than 
Tantalum, etc all the way down to COG. Thus filter capacitors can  affect EFC 
voltage when you point moving air on them. Then there are all the  thermocouples 
in the solder junctions and cabling, and the other parts..
 
BTW: the lowest power GPSDO is not the Trimble unit you mentioned - as  far 
as I know it is our FireFly GPSDO which only consumes a meager 1.35W at room  
temperature, and it also uses an OCXO.
 
Bye,
Said
 
 
In a message dated 7/27/2008 11:56:04 Pacific Daylight Time,  
Murray.Greenman at rakon.com writes:

As an  aside, it is interesting to note the steady-state power
consumption of the  various units. The Z3801A is spec'd at 25W, the
Z3815A (with hockey-puck  oscillator) 35W, and at the other extreme, the
Trimble NTGS50AA only  5W!

73,
Murray  ZL1BPU






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