UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

paulsherwin · 13th May 2019, 2:45 pm

I power my Linex from a wall wart via a 7805, and it does introduce a faint hum. It isn't audible on portable radios at sensible listening levels but wouldn't be acceptable feeding a hifi system. I haven't bothered investigating as it isn't a problem for me.

13th May 2019, 2:45 pm	#7
paulsherwin Moderator Join Date: Jun 2003 Location: Oxford, UK Posts: 27,946	Re: Deriving 3v at 30mA from 5V Supply I power my Linex from a wall wart via a 7805, and it does introduce a faint hum. It isn't audible on portable radios at sensible listening levels but wouldn't be acceptable feeding a hifi system. I haven't bothered investigating as it isn't a problem for me.