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@contesting.com> On Behalf Of Jim Brown
Sent: Thursday, March 14, 2019 2:22 PM
To: rfi@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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