[RFI] Trying to locate the Part 15 compliance note...

[Dave Cole (NK7Z)]

Hi,

I get why the issue is happening, and while I totally agree with both of 
you, that it is fundamental overload, the vendor has so biased the 
customer, (by saying it is a ham transmitter causing the issue), that I 
need something that actually says that now... Hence why I was looking 
for a part 15 label on it in the first place.

When I have the meeting with the vendor, and the customer, I want to be 
able to say, and show, that I have checked everything, and that here is 
the statement from the vendor of the amplifier, saying the amp is clean.

The vendor complicated this immensely by blaming a ham transmitter for it...

73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon

On 3/14/19 11:32 AM, Hare, Ed  W1RFI wrote:
> I agree with Jim; this problem is being caused by the fundamental signal of your station.  Harmonics from that amplifier are down many tens of dB and if 500 W causes your problem but 100 watts does not, those harmonics that are on the order of milliwatts even if the amp is in horrible condition would not overload the stove.
> 
> 
> -----Original Message-----
> From: RFI <rfi-bounces at contesting.com> On Behalf Of Jim Brown
> Sent: Thursday, March 14, 2019 2:22 PM
> To: rfi at contesting.com
> Subject: Re: [RFI] Trying to locate the Part 15 compliance note...
> 
> On 3/14/2019 8:30 AM, Dave Cole (NK7Z) wrote:
>> I have sent my KPA500 to Elecraft to get a compliance check in
>> preparation for a meeting with the vendor, and the owners of the
>> affected stove.
>>
>> I am considering asking the vendor to pay for this once the amp is
>> proven good...  But that will happen after the RFI issue is solved.
> 
> Dave,
> 
> There is absolutely NO technical reason for doing this. By definition, any product that is not intended to act as a radio receiver should be susceptible to radio transmissions. If it is, it is defective in design and/or construction. The only way we could possibly be at fault in an RFI case is if we transmit harmonics, intermod, or spurs ON THE FREQUENCY that a radio receiver is tuned to. Anything else is the fault of the victim product.
> 
> 73, Jim K9YC
> 
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