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 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
