Well, I didn't hear them on 160 this A.M. out here in s/w Utah but I did hear
and work 'em QRP on 80 meters this morning sosomething good to report
from the black hole of low band communications, s/w Utah.
72, Jim R. K9JWV
Date: Thu, 5 Apr 2012 21:32:13 -0700
From: wa9...@yahoo.com
On 4/5/2012 9:45 AM, Jim F. wrote:
I will continue to use one upstairs well away from my operating
table turned off while operating because I like the bulb and the
price.
That's a very bad move -- by buying an RF-noisy product, we cause RFI to
ourselves and our neighbors, and we cause more
Excellent advice Jim,
And another thought...Since this bulb complies with
part 15 of FCC rules our only hope may be with the ARRL.
My QRP club is visiting ARRL on the 21st. of this month and the topic
will be brought up.
Top Band is a great forum / list !
73,
jim
--- On Fri,
Hello, Would you please remove my husband K8LJQ from your email list for
Topband activities. His health has not been good and can no longer operate a
station.
The email to remove is k8...@earthlink.net
Thank you ,
Rebecca LeBow
XYL-K8LJQ
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On Fri, 6 Apr 2012 11:57:15 -0700 (PDT)
Jim F. j_fit...@yahoo.com wrote:
...Since this bulb complies with
part 15 of FCC rules
It is marked to comply, but it may not. (Part 15
compliance is self-certified. It would be interesting to
test it against Part 15 requirements.
I believe that one
My calculations assume that the LED lamp conducted emissions are at the FCC
limit at a single frequency in the 160 meter band. This is not real world.
I'll buy a lamp and characterize the conducted emissions.
Dave WX7G
On Apr 6, 2012 4:44 PM, DAVID CUTHBERT telegraph...@gmail.com wrote:
I did some research and Maxim makes ICs for offline LED lamps such as the
Home Depot lamps. The switching frequency is 50 to 330 kHz and the
incoporate frequency dithering to reduce EMI.
The standard they adhere to appears to be EN 55015, Limits and methods of
measurement of radio disturbance
On Fri, 6 Apr 2012 17:24:25 -0600
DAVID CUTHBERT telegraph...@gmail.com wrote:
My calculations assume that the LED lamp conducted
emissions are at the FCC
limit at a single frequency in the 160 meter band.
What made me sceptical was the original posting mentioning
that the bulb interfered
It is quite possible that the products--while claimed to meet Part
15--actually do not, either on some lots or all of them. The real
question is whether anyone checks after the original determination.
Garry, NI6T
On 4/5/2012 6:07 PM, Jim F. wrote:
Hi George,
I first noticed the problem
Jim, K9YC is absolutely right as usual. Another thing to do is to send
interference reports from LED bulbs to the FCC with copies to the ARRL,
and include the NAB (National Association of Broadcaster) who will be
sure to produce some public service announcements for the many member
stations
Topband,
I spoke with the E51M operator on 12M SSB tonight, Webb, and he said
the team will be on 160M tonight for their sunset at 0444Z. Plan
accordingly.
Thanks,
Jim N4DU
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