Hi Frank.
That's what I did to start with...I took an old 5 volt phone charger and used it. But then I was having drift problems with the U3S? - it was gradually increasing frequency with use, ending up about 100Hz high from the dial frequency -? and finally discovered that my '5 volt' charger was producing 6.68 volts ...very stable, but very high!
Changing that out for the one I mentioned earlier, which was very steady at 5.01 volts by my meter, fixed my drift problem.
Roger
G3YTN
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On 2018-01-01 15:33, Frank W1FRA wrote:
For years, I have gone to the local Transfer Station, ie the Dump, and simply collected cell phone chargers, all 5VDC, and especially the newer Motorola ones, very stable. Free, get to know the people working there, and they will even save them for you. And free.
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I especially like the ones that are used with Fisjer Price toys. They are rugged, and very stable.
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Frank? ?W1FRA
