[RFI] Comments on RFI from Ductless Air Conditioning Units?

[Dale]

David,

Be certain to specify FCC Part 15 Class B limits.  Those are the limits applicable to home and office environments.

After that, it will then be up to you to determine if Part 15, Class B limits are, in fact, adequate for your application.  Keep in mind that if your antennas are fairly close to the shack or house (less than 50 feet away), you could still have problems with RFI, especially in the HF range.  You probably won't know until you try it.

73, Dale
WA9ENA


-----Original Message-----
>From: David Cole <dave at nk7z.net>
>Sent: May 12, 2013 3:26 PM
>To: rfi at contesting.com
>Subject: Re: [RFI] Comments on RFI from Ductless Air Conditioning Units?
>
>Hi all,
>
>Just a quick thank you note to the list...  As a result of the
>discussions here, I had written into my install contract that the system
>I purchased would meet PART 15 requirements...  I chose to use Part 15,
>as opposed to any other language as it leaves me in the drivers seat if
>there is an RFI issue, and the vendor is happy because it is something
>from a 3rd party...  They figure it must be OK if the Feds are
>helping!  :)
>
>They came out and fixed a slight RFI issue within a day of my call...
>They also contacted the manufacture prior to install to insure there
>would be no unfixable installs...  
>
>We ALL need to make sure of this, prior to installs...
>
>I got them to add the proviso to the install contract by telling them it
>was a "show stopper" if they did not include it.  They were happy too,
>as they know darned well some other contractor would include it...  All
>of this was done in a polite and friendly way.  The result...  Not a
>peep out of my new heater system, and fans.
>
>So thank you all for bringing this up PRIOR to my purchase...  It came
>up a few months ago, when I bought my system!  I have been meaning to
>thank you all, but this reminded me!
>
>-- 
>Thanks,
>Dave
>For Amateur Radio equipment reviews and setups see:
>http://www.nk7z.net
>
>
>
>On Sun, 2013-05-12 at 12:04 -0400, Jeff Stevens wrote: 
>> Just wanted to thank everyone for their input on this.  Indeed, many
>> of the ductless air conditioning units sold now are actually
>> bidirectional air source heat pumps -- so it's all pertinent.
>> 
>> The bottom line is that I will find an installed system of the same
>> model, and do some listening, before committing to anything,
>> 
>> Thanks again!
>> 
>> -Jeff
>> W7WWA
>> _______________________________________________
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>> RFI at contesting.com
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>
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