Jim is right on here..especially about the Tecsun radios. They are very
helpful.
I recall an incident some 25 years ago where I had a terrific noise on
hf that the local Virginia Power RFI Investigator tracked to a neighbor's
house. HE knocked on the door and asked what they had running. Turned out to
be a GAS CLOTHES DRYER. The gas dryer had some sort of electric powered gas
release valve that was making the noise. He convinced them that it might be
dangerous and the neighbor replaced the dryer, and with the old dryer went
the noise. -Mike
-----Original Message-----
From: Jim Brown
Sent: Monday, May 11, 2015 9:14 PM
To: rfi@contesting.com
Subject: Re: [RFI] RFI - GE Profile Gas Range - Model PGS920SEF1SS
On Mon,5/11/2015 2:41 PM, Fred - NA2U wrote:
If not, can someone suggest a course of action in finding out who at GE
might handle such a problem?
I would start with the installing contractor (or vendor). There is, for
example, a possibility that wiring to the unit is faulty. Take the
position with whoever you contact that any electronic device must meet
stringent RF limits per Part 15 of FCC Rules for a Class B (residential
use) product, so if it is causing interference, it is defective and they
must fix it. And do NOT tell them about HAM radio. Just tell them that
it is causing interference to your AM and FM radio! That makes it much
harder for them to think of your complaint as a small minority.
If you haven't already done so, probe around the unit with a portable
consumer radio. The Tecsun PL380 costs less than $50, covers LF, MF, HF,
and FM broadcast. The Tecsun PL660 and PL880 cost about $150 and $200
respectively. They are worth the difference in price -- better
sensitivity, they receive SSB, and they have the AM aircraft band that's
above 108 MHz.
Look at the unit as closely as you can. What electrical connections are
present? How does the unit get it's power? Does it plug into an outlet,
or is wiring connected by an electrician? If an outlet, who provided the
outlet? Is all of this wired correctly? Is the power line green wire
connected directly to metal on the range? It must be, by law.
If power is the only connection to the unit, that's probably what is
radiating the trash. If so, it may be possible to kill the RFI with
multiple turns of the power line around a #31 or #43 toroid. The two
mixes are both effective from 40-10M. None of that will help if the
trash is radiated by internal wiring.
And by all means, keep us informed of how things work out, what fixes
the problem, etc.
73, Jim K9YC
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