[RFI] Aquarium Heater

[Pete Smith]

OTOH, if the heater's thermostat is a standard thermo-mechanical type, 
you probably don't need to know all that.  I tracked down a noise source 
a few years ago that turned to be an older, heated dog dish.  The owner 
replaced it with a new one of the same type, and the noise went away.  
You could hear the contacts arcing.

73, Pete N4ZR

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On 2/10/2011 10:02 AM, Peter Laws wrote:
> On Thu, Feb 10, 2011 at 02:05, Jim Brown<jim at audiosystemsgroup.com>  wrote:
>> On 2/9/2011 5:42 PM, KD7JYK DM09 wrote:
>>> Out of curiosity, how much RFI can a piece of nichrome wire produce?
>>>
>> You're asking the wrong question. Some of the right questions are, "what
>> is the nature of the current source for the heating element, what is the
>> waveshape, what is the spectra, and what is the enclosed area of the
>> loop that carries that current?" And, as others have suggested, the same
>> questions should be asked about the thermostat.
>
> The guy at the fish store will NOT know these answers.  :-D
>
>