SCVJeff wrote:
All of them that I've played with are generating RFI into the antenna directly.
Are you saying the diodes, themselves, are generating RFI or the regulation circuit?
FWIW, I'm using Asian, non-regulated LED panels, a mix of 36 or 48 3528's and the newer 5050 panels. My float voltage is 13.2-13.6v, depending on charging source. I had thought of using a linear regulator for the lamp circuits (actually an easy thing to do with my layout) but all the panels are still functioning and I don't experience any detrimental RFI. I have my own DIY UHF antenna and a dipole for radio.