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

Jonster · 13th Jul 2018, 5:07 pm

Although the commonly available 12v to twin USB adaptors are cheap and plentiful, they generate a frightful amount of RF interference. That radiated from the device lead connected to your dashcam/phone etc can be minimised by the judicious application of a ferrite choke but they also radiate a lot into the cars wiring, enough to make Radio 2 from Wrotham at 240kW ERP unlistenable along the A27 between Lewes and Brighton! Pulling the adaptor from the 12v socket to disconnect normal reception is resumed.

13th Jul 2018, 5:07 pm	#18
Jonster Heptode Join Date: Apr 2008 Location: Eastbourne, East Sussex, UK. Posts: 671	Re: 12V to USB convertor. Although the commonly available 12v to twin USB adaptors are cheap and plentiful, they generate a frightful amount of RF interference. That radiated from the device lead connected to your dashcam/phone etc can be minimised by the judicious application of a ferrite choke but they also radiate a lot into the cars wiring, enough to make Radio 2 from Wrotham at 240kW ERP unlistenable along the A27 between Lewes and Brighton! Pulling the adaptor from the 12v socket to disconnect normal reception is resumed.