cathalferris
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cathalferris
Not all 5V power sources are the same. One thing about the phone chargers, is that they can carry an *awful* amount of ripple current, at frequencies in the tens...
To add another data point: I've got a PiZero W version 1 running Buster, with the QRPGuys [EZ-PiWspr](https://qrpguys.com/ha7dcd-ez-pi-wspr) board. I can transmit test tones perfectly fine, and I can easily...