Poor DAB reception on some channels - 2024 T6.1

[Rololux]

This discussion is going in a very interesting direction. I’m interested to hear from Hamid and others that using peripheral devices can cause radio reception problems. The interference caused by such devices is likely to be wideband noise, rather than the specific frequencies used by DAB.

There are situations where the front end of a receiver can become saturated with interference - effectively the noise floor is raised substantially, reducing the signal to noise of the wanted signal such that reception may fail. We had a situation at work where the radar altimeters from aircraft on the approach to a nearby airport were saturating the LNAs of C-band satellite receivers. The altimeters were operating at different frequencies than the satellite transmissions, but in the same band, and at much higher power, so caused the receivers to saturate. We had to have filters specially made at great expense to solve the problem, but it worked.

A possible solution in this case would be to put a good quality rf filter between the antenna and the receiver, that only lets through the desired band - in this case VHF. If such a filter could be found, it would almost certainly mean that AM radio stops working, but seriously, who ever uses that?

Over to Hamid…

 

[Cali-donia]

I was having DAB issues from a USB supply plugged in to the 12V cigarette lighter supply on top of the dashboard in my T6.1.

I tried attaching ferrite cores to either end of the short USB cable, but that’s didn’t help, so I went back to using the supply the dash cam came with, but there is a big coil of cable now.

Does anyone have a link to a 12V USB supply that doesn’t cause interference?

 

[WelshGas]

I was having DAB issues from a USB supply plugged in to the 12V cigarette lighter supply on top of the dashboard in my T6.1.

I tried attaching ferrite cores to either end of the short USB cable, but that’s didn’t help, so I went back to using the supply the dash cam came with, but there is a big coil of cable now.

Does anyone have a link to a 12V USB supply that doesn’t cause interference?

Normally the more expensive ones are OK.
Not had any problems with those made by Anker.