Radio Frequency Interference From 12V-to-USB Adapters

Many small electronic devices have switching regulators in them that can generate a bunch of Radio Frequency Interference (RFI). This is not my first encounter with RFI-spewing devices. See this article about a automotive 12V-to-USB adapter giving me trouble: This Interference Seems To Follow Me Everywhere

I recently bought a couple of adapters that are physically larger than the one I wrote about. I was thinking that a larger size might allow for a little more filtering and a design that does not radiate. I was half right: one of them works pretty well, the other is an RFI Bad Boy.

Take a look at this short video where I check them out.

 

 

 

This is an Amazon link to the adapter that works pretty well.
Enercell® 2-Port USB CLA Car Charger

 

73, Bob K0NR

The post Radio Frequency Interference From 12V-to-USB Adapters appeared first on The KØNR Radio Site.

Bob Witte, KØNR, is a regular contributor to AmateurRadio.com and writes from Colorado, USA. Contact him at [email protected].

One Response to “Radio Frequency Interference From 12V-to-USB Adapters”

  • Harry K7ZOV:

    I have found these little guys to be a disaster to use if you want to do mobile ham radio. My experiences have all been on HF mobile and traveling. It is either top off the phones or have the mobile HF radio on. One but not both.

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