I'm a cheap skate... I bought one off amazon for $99 bucks...
my cheap power supply I bought it because it had a cigarette socket in it and a pretty green light and was small enough to sit on my little shelf.... I knew nothing about them back then.
after I bought it, I learned a little about them... I didn't know how much interference the cheap ones can produce..... my
Btech RPS-30M 30 amp power supply has worked fine and doesn't seem to make any RF noise...
many people say it's hit or miss with the power supply I bought some are terrible some are just ok.... so I got really lucky....
I take a EcoFlow battery back up unit and connect it to my 5555 N II sometimes instead of my Btech power supply to see if there is a difference... never see or hear any difference... I have also tried just using a car battery... again luckily no difference.
I do a lot of handheld CB testing and I like to have the cigarette lighter plug.. it always measures 13.8 volts on my Craftsman multi meters
I said I think I see a base station in your future BillDean... are you looking into it?
I think this video was my first week of having my base station... I was able to talk to 22 countries the first month I had my base station ... it was incredible... I still smile when I can talk to Europe on channel 37 or 38 LSB using the CB band.. it was a real blast!
and as everyone said.. that Anytone 5555 N II is one fantastic radio!!!!