[GPS_Standard] Power supply for HP 10544A osc

[grahamh at austin.rr.com]

John:

The +25 Volt line powers the heater and will work from about
18 to 25 Volts, so 24 is fine.

The oscillator electronics all work from the +12 Volt line.

I recommend against the switcher, since the switcher frequency
has a tendency to show up as a sideband on the oscillator.

In fact the heater inside the HP10544 is controlled by a
switcher.  The later HP10811 replaced the switcher
with a linear regulator to get rid of the 90 kHz spur on
the HP10544.

--- Graham / KE9H

==
---- "John A. Evans - N0HJ" <jaevans at pcisys.net> wrote: 
> Greetings all and Happy Thanksgiving to those in the US.
> 
> I'm shopping for power supplies for my GPS standard build and have the 
> HP 10544A oscillator to power.  The data I have shows that the oven 
> needs 25V but I am wondering if a 24V supply would work fine for this 
> use.  Since most supplies are rated at nominal but often put out more 
> voltage, I'm hoping that this would work for my situation.  I could 
> always crank out my own linear supply, but a lighter, cheaper switcher 
> might be an easier sub.
> 
> Thanks,
> John
> 
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