[Elecraft] WTB Trimble ThunderBolt for K3EXREF / QS1R

[Jim Brown]

On Tue,4/7/2015 12:31 AM, Edward R Cole wrote:
> A caveat regarding the use of simple "wall wart" 12v PS for supplying 
> a OCXO. 

Wall warts, especially those with switching power supplies, are ALWAYS a 
BAD thing, thanks to the RFI they generate.

A GOOD thing -- a LINEAR supply, wall wart or otherwise, float-charging 
a battery, where the battery voltage is what the equipment needs, and 
the current from the wall wart is about 30% more than what it takes to 
run the equipment.  No hum, no buzz, no RFI, and you've got a UPS in the 
form of that battery. ALL of the stuff in my home (with the exception of 
a TV and associated A/V gear) runs on that kind of charger-battery 
system. The only noise I hear is from my neighbors.

73, Jim K9YC