Art,
I am assuming you are building your own;
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I used an LM7808 ?(8v) regulator into the Nano (Arduino), and use the 5v out of the Nano to power the DDS /LCD (if you're building your own)
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I have also used these successfully to help eliminate noise;
http://www.xppower.com/pdfs/SF_IV.pdf
to power a noisy OLED display - but they are not cheap and you need to be aware of your power requirements.
Rgds,
Darryl
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On 2017-01-24 11:15 AM, Art Olson via Groups.Io wrote:
the Bitx40 uses 12v natively however the qrp-labs DDs vfo requires 5 volts. I have tried several buck converters but there is a lot of hashing (noisy) when the converter is powered on. Anyone have a suggestion as to anything I might try. If I use an external 5 volt wall wart then the problem (noise)?goes away. I don't want to have a 12 v power connection and have to run a wall wart also.
73
art
