Problems with mini-360 Buck Regulator [1 Attachment]
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Did you adjust the buck regulator to make sure it was putting out 5V? Jack, W8TEE From: "mlhooper1@... [SoftwareControlledHamRadio]" To: SoftwareControlledHamRadio@... Sent: Friday, May 20, 2016 1:03 PM Subject: [SoftwareControlledHamRadio] Problems with mini-360 Buck Regulator [1 Attachment]
[ from mlhooper1@... [SoftwareControlledHamRadio] included below]
Has anyone else experienced power problems with the DDS VFO kit (QST Mar16) ?? When I first powered up the board, the VFO worked but when I monitored the signal on a hf receiver the signal sounded very bad. ?I then monitored the signal on my Elecraft K3 with the P3 spectrum monitor. ?The signal looked terrible. ?See the attached photo. I then tried powering the VFO through the USB cable and it worked fine. ?Signal looked great on the spectrum monitor. ?I suspected the mini-360 since it is inactive when the unit is powered through the USB cable. Long story short, after replacing the first mini-360 with another one which seemed better but not good, I ultimately replaced the mini-360 with a 7805 regulator. ?DC current through the power supply is about 100mA higher, but otherwise everything seems fine. Has anyone had similar experiences? ?Or, perhaps I just bought some bad mini-360s on eBay...they were sure cheap enough.
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jjpurdum