power supply for dashcam

[ajcommercial]

Hiya all..  I have fitted a permanent power supply for my dash cam, I soldered the connections directly to the cigarette lighter and ran the cable around the end of the dash, up the inside of the inner trim and under the roof liner, I have noticed a drop in radio station quality, I recon it's the route of the cable, is a dash cam power cable going to cause an issue with radio quality ? The aerial lead runs down the same route of the power cable.. If it is the issue, can I just cover the aerial cable or power cable with tin foil ?

[brodfather11]

I too had the same problems after doing the same as you .
Tried all of the 12v to 5v supply droppers hoping to sort it out but didn't work.
In the end I took the original cable and modified it. I removed the plug but kept the circuit board inside it and wired that directly into 12 volts . Got a little plastic box off ebay and used that as a housing for the board and a bit of twin core cable.
I didn't try your idea of wrapping the wire in foil which may work as it should cut down on interference from the feed cable.

[cancunia]

Do you think it's electrical noise from the 12v > 5v conversion? Maybe you can find some shielded cable and earth the shield at one end? USB cables are generally shielded, maybe a longer USB cable up by the aerial would work?

Edit:
It's a rainy day so have been reading far too much stuff online. Chances are that the power supplies are 'buck' converters which do produce some noise. Today I received one of these, it's apparently not a buck converter according to the description so may not cause as much noise. Not sure if one of these has been tried?
https://www.ebay.co.uk/itm/12V-Step-down...2749.l2649
One note of caution, the only reason I started checking this out was because it arrived this morning & I'd forgotten I'd ordered it back in March, it was due for delivery in May at the latest! I bought one to power a Bluetooth receiver / pre-amp for my radio with a spare output for a dashcam.

[brodfather11]

I tried those boxes ,ordered two with the usb end , one didn't work and the other caused interference.
Just to see the response from the supplier I complained about the dud one and was asked to send a photo.! Never heard any more from them .

[mickrochip]

had same problem with my dash cam , used ferrite core i got of ebay , just clamped ferrite core to cable as close as possible to dash cam