Induction cooktops and RFI?

Terry Fox tfox at
Thu Apr 12 19:18:08 CDT 2012

Thanks Andre!  My spec an only goes to 3GHz.  The whole idea was to know what they (induction cooktops) do BEFORE I buy one.

Maybe you could camp out at the local Sears with your spec an, and test for me??

From: André Kesteloot 
Sent: Thursday, April 12, 2012 8:11 PM
To: Terry Fox 
Cc: mailto:andre.kesteloot at ; mailto:tacos at 
Subject: Re: Induction cooktops and RFI?

Well ,I have here a spectrum analyzer that goes to 200 MHz.

Buy me a similar cook- top, have it delivered free-of-charge to my castle, and I shall be pleased to investigate whether it nastily radiates  HF waves, or not .
This service will be at no charge to you 

Sent from my iPhone; eventual mIstAkEs should be blamed on the thickness of my fingers :-)

On 12 Apr 2012, at 19:48, "Terry Fox" <tfox at> wrote:

  From: Andre Kesteloot 
  Sent: Thursday, April 12, 2012 6:59 PM
  To: tacos at ; Terry & Judy Fox 
  Subject: Re: Induction cooktops and RFI?

  On 4/12/2012 18:31 PM, Terry Fox wrote: 
    Does anyone use an induction cooktop, and can tell me if there is any RFI from it to ham bands?
    Terry, WB4JFI


  We don't have an induction cook-top, but
  isn't the induction coil powered by the 60Hz mains ?

  I was more worried about the control circuitry, and if there is a solid-state switching of the element.  Since induction is designed to radiate a magnetic field (albeit at 60Hz?), if that field is controlled by higher-speed devices, there might me more radiation?  Or not.. 

  Do they do PWM for the control?  It also seems that there are a lot more “steps” in the control than a traditional electric cooktop.

  Tacos mailing list
  Tacos at
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <>

More information about the Tacos mailing list