On 21/01/2020 00:39, Steve Walker wrote:
On 20/01/2020 12:07, John wrote:
My DAB has been breaking up recently and the radio automatically drops to
FM. This is a bit annoying though die to the slight time difference.

Grubbing about on a Facebook Group someone asked if I had anything
plugged
into myÂ* Cigar Lighter Socket - I have - a Dashcam. I unplugged it and
the
problem went away.

It seems the 12v to 5v ciruit causes interference. I found a couple of
YouTube videos that seem to confirm it.

Now I need a solution!

Replace it with an (inefficient) linear regulator, such as some variant
of a 7805, with a heatsink, instead of the (efficient, but noisy)
switched mode supply that you have?

SteveW
You can buy better converters too.

The ones for RC model planes are - surprise surprise - specced for low
RF interference.

But it does mean taking the dashcam apart


--
"Strange as it seems, no amount of learning can cure stupidity, and
higher education positively fortifies it."

- Stephen Vizinczey