portable USB power from 12VDC
Recently, my brother told me about a problem he had with a USB power adapter that was causing a lot of RFI on VHF in his mobile setup. It’s not hard to imagine how inexpensive 12V to USB adapters could cut corners and cause interference. I found some higher quality adapters that mount in a round, 28.5-30mm hole.
I used Sketchup to design an enclosure that consisted of a mounting plate for two adapters and a box to contain the wiring along with an Anderson PowerPole power connector.
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