When I was changing the bulbs out I took the opportunity to remove all
dimmers, never really used them, and a touch lamp the wife hated (large
blessing on me).
The wife has been looking at touch faucets for the sink. They've got to
be an RFI nightmare. I said NO. Plumber makes enough the way
Yes, exactly my point.
Although one may find the local AM or FM station is "exciting" these
lamps, be they CFL or LED. They may, to some extent, generate the crap
we hear. For us hams, when we transmit the noise may be produced but
is not of concern in as much as they are quiet when we
On 10/24/2017 5:55 AM, Bob McGraw K4TAX wrote:
When the transmitter was activated, the spikes of noise appeared.
With the transmitter off, the spikes again were not present. Not a
real analytical or scientific method but some degree of indication
that some are better than others, some are
My big worry with regards to LED lights is that they have parts that are
sourced from different makers from run to run...
You get LED lights that on one run are dead quiet, and on subsequent
runs are not quiet...
I bought 20 of these bulbs, after testing one, and so far they all
appear
The only time I've noticed RFI issues from CFL or LED bulbs is when they
are being excited by RF. I've measured 3 or 4 different ones of
different brands and wattage ratings. This was done using a fixture
where by the bulb was mounted on a suitable surface in a socket with the
transmit
I must have at least 30 LED bulbs around the house ranging from ½W to 23W (eq.
to 120W incandescent flood light).
Most are in the range of 25 to 60 Watt equivalent (200 to 800 Lumens).
Some are 5 years or more old and are from many different manufacturers.
The distance to antennas is anywhere
;hamsh...@n4st.com> wrote:
>>>>>>
>>>>>> I have noticed the background noise level growing on the HF bands,
>>>>>> and for me, especially on 18 Mhz. I need to declare war on RFI and find
>>>>>> out what is causing this.
@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bob McGraw
K4TAX
Sent: Saturday, October 21, 2017 11:32
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] OT: LED Light Bulbs
Makes me wonder if at all or how frequently production lots are
evaluated to determine if they ar
On 10/23/2017 9:35 PM, Dave Cole (NK7Z) wrote:
Currently Dollar Tree has a set of 60W sunbeam LED lights on sale for
a buck each, and they are dead quiet. I bought 20 of them today, and
swapped out every light in the house. Lost about half an S unit of
noise.
Thanks for the "heads up,"
efore committing to them and they were
fine.
_
73,
Jim - N4ST
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bob McGraw K4TAX
Sent: Saturday, October 21, 2017 11:32
To: elecraft@mailman.qth.net
Subject: Re: [E
h.net] On Behalf Of Bob McGraw K4TAX
Sent: Saturday, October 21, 2017 11:32
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] OT: LED Light Bulbs
Makes me wonder if at all or how frequently production lots are
evaluated to determine if they are in FCC Part 15 compliance.
Otherwise, the approach &
Bob McGraw K4TAX
Sent: Saturday, October 21, 2017 11:32
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] OT: LED Light Bulbs
Makes me wonder if at all or how frequently production lots are evaluated to
determine if they are in FCC Part 15 compliance.
Otherwise, the approach "we evaluat
On 10/21/2017 1:45 PM, Gary Smith wrote:
> Something to consider is what noise is coming in on the cable after
> you pull the breaker on the house. I did that and found the AM
> portable went nuts next to the breaker box. Found the noise is coming
> in off of the cable lines. Zero luck with the
On 10/22/2017 13:31, Phil Kane wrote:
The volume of electronic devices shipped from overseas
has so overwhelmed both the FCC and the US Customs that they have
stopped requiring and processing the former Declaration of Conformity
(FCC Form 740) for importation.
That explains much.
73,
Scott
On 10/21/2017 1:28 PM, Kevin Cozens wrote:
> The FCC (or was it ARRL) is doing a study/survey about the increasing
> noise floor in the RF spectrum. It no longer surprises me that the floor
> is rising when the US approval process is so lax.
It started going downhill when the FCC in its infinite
On 10/21/2017 8:32 AM, Bob McGraw K4TAX wrote:
> Guess I need to power the radio from the tractor battery and dump the
> main breaker in the house to see how much the noise changes.
That's always the first step in chasing RFI. If that does it, then trip
each individual breaker one at a time and
A year or two ago, W3LPL taught us that this is the result of passive
intermod generated either by the diodes or the SMPS or both. We see this
in our CW contesting trailer, where CW operating frequencies on 80, 40,
and 20 are harmonically related. We run K3, P3, KPA500, KAT500 to
individual
Hello Jim,
Something that might help you in your RFI fight is being able to
accurately define your RFI environment. See:
http://nk7z.net/sdr-rfi-survey-p1/
for a brief write up on how to use an SDRPlay RSP-1 to look at your
entire RFI environment, shown as a spectrogram, of frequency vs
Something to consider is what noise is
coming in on the cable after you pull the
breaker on the house. I did that and found
the AM portable went nuts next to the
breaker box. Found the noise is coming in
off of the cable lines. Zero luck with the
cable company...
Just sayin'
73,
Gary
KA1J
As I understand a company can perform self certification. There seems to be no
independent audit system. Thus if the company says it meets specs, then it
meets specs.
Bob, K4TAX
Sent from my iPhone
> On Oct 21, 2017, at 3:28 PM, Kevin Cozens wrote:
>
>> On 2017-10-21
On 2017-10-21 10:48 AM, w4sc wrote:
LED bulbs are required to meet FCC Part 15 FCC, Class B regulations.
I found out first hand a number of years ago that a device that has type
approval in the US can still spew a lot of unwanted RF. Better to have some
approval process but it would be
craft-boun...@mailman.qth.net] On Behalf Of Bob McGraw K4TAX
> Sent: Saturday, October 21, 2017 11:32
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] OT: LED Light Bulbs
>
> Makes me wonder if at all or how frequently production lots are evaluated to
> determine
_
73,
Jim - N4ST
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bob McGraw K4TAX
Sent: Saturday, October 21, 2017 11:32
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] OT: LED Light Bulbs
Makes me wonder if at all or how
Makes me wonder if at all or how frequently production lots are
evaluated to determine if they are in FCC Part 15 compliance.
Otherwise, the approach "we evaluated one production lot, deemed it
passed" {a.k.a - I saw it work once, ship it} and then produced a
million or so afterwards
I didn't post this because I hoped it'd help everyone with their Garage
Door Openers.
I posted it because *if* the Genie Bulbs are low-RFI across the whole
spectrum, that might be useful for other reasons.
73 -- Lynn
-Original Message-
From: Lynn W. Taylor, WB6UUT
Apparently correct, Lynn. I had my garage door serviced two weeks ago and the
last thing the repairman did was pop open the frosted plastic bulb cover on the
opener and say "just making sure you don't have LED bulbs in here. They play
havoc with the receiver on the openers). He said most
How ironic. My two Genie garage door openers sit there and generate a huge
amount of buzz-saw hash on HF as long as they have power. I have to
essentially unplug them to use the radio, and my horizontal loop is 100
feet away from them.
Chip
AE5KA
On Sun, Oct 1, 2017 at 5:30 PM, Lynn W. Taylor,
On Sun, Oct 1, 2017 at 5:30 PM, Lynn W. Taylor, WB6UUT <
kx...@coldrockshotbrooms.com> wrote:
> Just saw an ad for Genie LED Bulbs.
>
> Apparently some LED light bulbs make enough noise that they desense the
> garage door receiver.
>
> These bulbs are specifically low-RFI.
>
> I have no more
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