Elecraft

OT: LED Light Bulbs

Classic

List

Threaded

30 messages Options

NK7Z

Re: OT: LED Light Bulbs

Here is the review of these lights...

https://www.youtube.com/watch?v=zJWssuCGkC8

73s and thanks,
Dave
NK7Z
http://www.nk7z.net

On 10/23/2017 09:35 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.
>
> 73s and thanks,
> Dave
> NK7Z
> http://www.nk7z.net
>
> On 10/23/2017 05:07 PM, Kevin Stover, AC0H wrote:
>> Maybe I'm just lucky.
>> Over the last two years I changed out all the incandescent and CFL
>> bulbs in this house save two. They are the two 150W Halogen lights I
>> have to illuminate the garage/driveway/deck if someone gets too close
>> to the house at night.
>>
>> No RFI detected on a K3 or a K2.
>>
>> On 10/21/2017 11:51 AM, Bob McGraw K4TAX wrote:
>>> One thing observed at our repeater location is that the CFL was quiet
>>> until the the transmitter was on the air. It then generated noise.
>>> In a simplex condition it wouldn't be observed. But in a duplex
>>> operation or multiple receiver situation it becomes an issue.
>>> Replaced by a LED with lessened issues.
>>>
>>> Bob, K4TAX
>>>
>>>
>>> Sent from my iPhone
>>>
>>>> On Oct 21, 2017, at 11:21 AM, Jim - N4ST <[hidden email]> 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. I did carefully checkout some
>>>> Walmart "100 W" LED lights before committing to them and they were
>>>> fine.
>>>>
>>>>
>>>> _________
>>>>
>>>> 73,
>>>>
>>>> Jim - N4ST
>>>>
>>>> -----Original Message-----
>>>> From: [hidden email]
>>>> [mailto:[hidden email]] On Behalf Of Bob McGraw K4TAX
>>>> Sent: Saturday, October 21, 2017 11:32
>>>> To: [hidden email]
>>>> 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 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 including those with some engineering
>>>> changes and cost down changes.
>>>>
>>>> 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.
>>>>
>>>> 73
>>>>
>>>> Bob, K4TAX
>>>>
>>>>
>>>>
>>>> On 10/21/2017 9:48 AM, w4sc wrote:
>>>>
>>>>> An observation:
>>>>
>>>>>
>>>>
>>>>> I too had RFI from LED lights, but the interference was to OTA
>>>>> television, Channel 10 (192-198 MHz) DTV.
>>>>
>>>>>
>>>>
>>>>> Not all LED bulbs are created equal in this regard, RFI reduction /
>>>>> elimination. The RFI was generated in this case by the SMPS
>>>>> integral to the bulb.
>>>>
>>>>>
>>>>
>>>>> The offending bulb is Utilitech part # 5DG6 (printed on the bulb)
>>>>> and is ‘C UL US’ listed, purchased from LOWEs.
>>>>
>>>>>
>>>>
>>>>> I have a overhead fixture that was populated with four 800 lumen
>>>>> (60w?) bulbs, 2 being Utilitech, and 2 Sylvania OSRAM.
>>>>
>>>>>
>>>>
>>>>> By removing the bulbs and observing channel 10 reception, the
>>>>> offending bulb was determined to be the Utilitech.
>>>>
>>>>>
>>>>
>>>>> I replaced the the the Utilitech bulbs with Sylvania OSRAM, and the
>>>>> RFI on channel 10 OTA was eliminated.
>>>>
>>>>>
>>>>
>>>>> The Sylvania OSRAM part number used is LED8.5A19/DIM/0/827/G5/RP as
>>>>> printed on the box UPC, and were purchased from LOWEs also.
>>>>
>>>>>
>>>>
>>>>> NOTE: There may be interference from Sylvania OSRAM bulbs on other
>>>>> frequencies. LED bulbs are required to meet FCC Part 15 FCC, Class
>>>>> B regulations.
>>>>
>>>>>
>>>>
>>>>> YMMV
>>>>
>>>>>
>>>>
>>>>> I have not seen a comprehensive report or article that unveils
>>>>> “good” vs “bad” LED bulb manufacturer and part identification as
>>>>> far as RFI emissions across the spectrum.
>>>>
>>>>>
>>>>
>>>>> Ben W4SC
>>>>
>>>>> ______________________________________________________________
>>>>
>>>>> Elecraft mailing list
>>>>
>>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>>
>>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>>
>>>>> Post: mailto:[hidden email]
>>>>
>>>>>
>>>>
>>>>> This list hosted by: http://www.qsl.net Please help support this email
>>>>
>>>>> list: http://www.qsl.net/donate.html Message delivered to
>>>>
>>>>> [hidden email]
>>>>
>>>>
>>>> ______________________________________________________________
>>>>
>>>> Elecraft mailing list
>>>>
>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>>
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>>
>>>> Post: mailto:[hidden email]
>>>>
>>>> This list hosted by: http://www.qsl.net
>>>>
>>>> Please help support this email list: http://www.qsl.net/donate.html
>>>> Message delivered to [hidden email]
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to [hidden email]
>>>
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

Jim Brown-10

Re: OT: LED Light Bulbs

In reply to this post by NK7Z

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," Dave. Will grab some tomorrow!

73, Jim K9YC

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

Clay Autery-2

Re: OT: LED Light Bulbs

In reply to this post by NK7Z

3000K.... VERY yellow... I wouldn't be able to see anything. I look
for highest possible... 5000K minimum

73,
Clay

On 10/23/2017 11:36 PM, Dave Cole (NK7Z) wrote:

> Here is the review of these lights...
>
> https://www.youtube.com/watch?v=zJWssuCGkC8
>
>
> 73s and thanks,
> Dave
> NK7Z
> http://www.nk7z.net
>
> On 10/23/2017 09:35 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.
>>
>> 73s and thanks,
>> Dave
>> NK7Z
>> http://www.nk7z.net
>>
>> On 10/23/2017 05:07 PM, Kevin Stover, AC0H wrote:
>>> Maybe I'm just lucky.
>>> Over the last two years I changed out all the incandescent and CFL
>>> bulbs in this house save two. They are the two 150W Halogen lights I
>>> have to illuminate the garage/driveway/deck if someone gets too
>>> close to the house at night.
>>>
>>> No RFI detected on a K3 or a K2.
>>>
>>> On 10/21/2017 11:51 AM, Bob McGraw K4TAX wrote:
>>>> One thing observed at our repeater location is that the CFL was
>>>> quiet until the the transmitter was on the air. It then generated
>>>> noise. In a simplex condition it wouldn't be observed. But in a
>>>> duplex operation or multiple receiver situation it becomes an
>>>> issue. Replaced by a LED with lessened issues.
>>>>
>>>> Bob, K4TAX
>>>>
>>>>
>>>> Sent from my iPhone
>>>>
>>>>> On Oct 21, 2017, at 11:21 AM, Jim - N4ST <[hidden email]> 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. I did carefully checkout some
>>>>> Walmart "100 W" LED lights before committing to them and they were
>>>>> fine.
>>>>>
>>>>>
>>>>> _________
>>>>>
>>>>> 73,
>>>>>
>>>>> Jim - N4ST
>>>>>
>>>>> -----Original Message-----
>>>>> From: [hidden email]
>>>>> [mailto:[hidden email]] On Behalf Of Bob McGraw
>>>>> K4TAX
>>>>> Sent: Saturday, October 21, 2017 11:32
>>>>> To: [hidden email]
>>>>> 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 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 including those with some engineering
>>>>> changes and cost down changes.
>>>>>
>>>>> 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.
>>>>>
>>>>> 73
>>>>>
>>>>> Bob, K4TAX
>>>>>
>>>>>
>>>>>
>>>>> On 10/21/2017 9:48 AM, w4sc wrote:
>>>>>
>>>>>> An observation:
>>>>>
>>>>>>
>>>>>
>>>>>> I too had RFI from LED lights, but the interference was to OTA
>>>>>> television, Channel 10 (192-198 MHz) DTV.
>>>>>
>>>>>>
>>>>>
>>>>>> Not all LED bulbs are created equal in this regard, RFI reduction
>>>>>> / elimination. The RFI was generated in this case by the SMPS
>>>>>> integral to the bulb.
>>>>>
>>>>>>
>>>>>
>>>>>> The offending bulb is Utilitech part # 5DG6 (printed on the bulb)
>>>>>> and is ‘C UL US’ listed, purchased from LOWEs.
>>>>>
>>>>>>
>>>>>
>>>>>> I have a overhead fixture that was populated with four 800 lumen
>>>>>> (60w?) bulbs, 2 being Utilitech, and 2 Sylvania OSRAM.
>>>>>
>>>>>>
>>>>>
>>>>>> By removing the bulbs and observing channel 10 reception, the
>>>>>> offending bulb was determined to be the Utilitech.
>>>>>
>>>>>>
>>>>>
>>>>>> I replaced the the the Utilitech bulbs with Sylvania OSRAM, and
>>>>>> the RFI on channel 10 OTA was eliminated.
>>>>>
>>>>>>
>>>>>
>>>>>> The Sylvania OSRAM part number used is LED8.5A19/DIM/0/827/G5/RP
>>>>>> as printed on the box UPC, and were purchased from LOWEs also.
>>>>>
>>>>>>
>>>>>
>>>>>> NOTE: There may be interference from Sylvania OSRAM bulbs on
>>>>>> other frequencies. LED bulbs are required to meet FCC Part 15
>>>>>> FCC, Class B regulations.
>>>>>
>>>>>>
>>>>>
>>>>>> YMMV
>>>>>
>>>>>>
>>>>>
>>>>>> I have not seen a comprehensive report or article that unveils
>>>>>> “good” vs “bad” LED bulb manufacturer and part identification as
>>>>>> far as RFI emissions across the spectrum.
>>>>>
>>>>>>
>>>>>
>>>>>> Ben W4SC
>>>>>
>>>>>> ______________________________________________________________
>>>>>
>>>>>> Elecraft mailing list
>>>>>
>>>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>>>
>>>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>>>
>>>>>> Post: mailto:[hidden email]
>>>>>
>>>>>>
>>>>>
>>>>>> This list hosted by: http://www.qsl.net Please help support this
>>>>>> email
>>>>>
>>>>>> list: http://www.qsl.net/donate.html Message delivered to
>>>>>
>>>>>> [hidden email]
>>>>>
>>>>>
>>>>> ______________________________________________________________
>>>>>
>>>>> Elecraft mailing list
>>>>>
>>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>>>
>>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>>>
>>>>> Post: mailto:[hidden email]
>>>>>
>>>>> This list hosted by: http://www.qsl.net
>>>>>
>>>>> Please help support this email list:
>>>>> http://www.qsl.net/donate.html Message delivered to [hidden email]
>>>> ______________________________________________________________
>>>> Elecraft mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:[hidden email]
>>>>
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html
>>>> Message delivered to [hidden email]
>>>>
>>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

Mark Goldberg

Re: OT: LED Light Bulbs

Part of the reason they look so yellow is the low CRI, or color rendering
index. Many bulbs lack deep red, so they look yellow even though they meet
the color temperature spec, they do it by having blue and more yellow and
tricking the measurement. Note that the CRI normally used is still not that
representative of the human eye. There is a newer version rarely used
because most bulbs would come out lousy. The human eye is used to black
body radiation, with a specific mix of colors. Even 2700 k can be perceived
as white if it is close to the black body curve.

I have found two bulbs that are in the 2700 to 3000 color temperature range
that look good. There are Cree TW series ones with high CRI, but 80% of
those I bought failed in three years. I did measure them to have low
conducted emissions with a clamp on probe made from a clamp on ferrite bead
and a spectrum analyzer.
More recently, I bought GE reveal LED bulbs that look good, but have not
measured RFI yet. and have no long term reliability info. These are used in
the XYL's craft room and she complained about the yellow looking ones, but
still likes the lower color temperature. These two types of bulbs are very
expensive compared to others.

Here is some light reading:

https://en.m.wikipedia.org/wiki/Color_rendering_index

https://en.m.wikipedia.org/wiki/Black-body_radiation

https://en.m.wikipedia.org/wiki/Light-emitting_diode#White

73,

Mark
W7MLG

On Oct 24, 2017 4:45 AM, "Clay Autery" <[hidden email]> wrote:

> 3000K.... VERY yellow... I wouldn't be able to see anything. I look for
> highest possible... 5000K minimum
>
> 73,
> Clay
>
>
> On 10/23/2017 11:36 PM, Dave Cole (NK7Z) wrote:
>
>> Here is the review of these lights...
>>
>> https://www.youtube.com/watch?v=zJWssuCGkC8
>>
>>
>> 73s and thanks,
>> Dave
>> NK7Z
>> http://www.nk7z.net
>>
>> On 10/23/2017 09:35 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.
>>>
>>> 73s and thanks,
>>> Dave
>>> NK7Z
>>> http://www.nk7z.net
>>>
>>> On 10/23/2017 05:07 PM, Kevin Stover, AC0H wrote:
>>>
>>>> Maybe I'm just lucky.
>>>> Over the last two years I changed out all the incandescent and CFL
>>>> bulbs in this house save two. They are the two 150W Halogen lights I have
>>>> to illuminate the garage/driveway/deck if someone gets too close to the
>>>> house at night.
>>>>
>>>> No RFI detected on a K3 or a K2.
>>>>
>>>> On 10/21/2017 11:51 AM, Bob McGraw K4TAX wrote:
>>>>
>>>>> One thing observed at our repeater location is that the CFL was quiet
>>>>> until the the transmitter was on the air. It then generated noise. In a
>>>>> simplex condition it wouldn't be observed. But in a duplex operation or
>>>>> multiple receiver situation it becomes an issue. Replaced by a LED with
>>>>> lessened issues.
>>>>>
>>>>> Bob, K4TAX
>>>>>
>>>>>
>>>>> Sent from my iPhone
>>>>>
>>>>> On Oct 21, 2017, at 11:21 AM, Jim - N4ST <[hidden email]> 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. I did carefully checkout some Walmart "100 W"
>>>>>> LED lights before committing to them and they were fine.
>>>>>>
>>>>>>
>>>>>> _________
>>>>>>
>>>>>> 73,
>>>>>>
>>>>>> Jim - N4ST
>>>>>>
>>>>>> -----Original Message-----
>>>>>> From: [hidden email] [mailto:elecraft-bounces@mailm
>>>>>> an.qth.net] On Behalf Of Bob McGraw K4TAX
>>>>>> Sent: Saturday, October 21, 2017 11:32
>>>>>> To: [hidden email]
>>>>>> 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 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 including those with some engineering changes and cost
>>>>>> down changes.
>>>>>>
>>>>>> 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.
>>>>>>
>>>>>> 73
>>>>>>
>>>>>> Bob, K4TAX
>>>>>>
>>>>>>
>>>>>>
>>>>>> On 10/21/2017 9:48 AM, w4sc wrote:
>>>>>>
>>>>>> An observation:
>>>>>>>
>>>>>>
>>>>>>
>>>>>>>
>>>>>> I too had RFI from LED lights, but the interference was to OTA
>>>>>>> television, Channel 10 (192-198 MHz) DTV.
>>>>>>>
>>>>>>
>>>>>>
>>>>>>>
>>>>>> Not all LED bulbs are created equal in this regard, RFI reduction /
>>>>>>> elimination. The RFI was generated in this case by the SMPS integral to
>>>>>>> the bulb.
>>>>>>>
>>>>>>
>>>>>>
>>>>>>>
>>>>>> The offending bulb is Utilitech part # 5DG6 (printed on the bulb) and
>>>>>>> is ‘C UL US’ listed, purchased from LOWEs.
>>>>>>>
>>>>>>
>>>>>>
>>>>>>>
>>>>>> I have a overhead fixture that was populated with four 800 lumen
>>>>>>> (60w?) bulbs, 2 being Utilitech, and 2 Sylvania OSRAM.
>>>>>>>
>>>>>>
>>>>>>
>>>>>>>
>>>>>> By removing the bulbs and observing channel 10 reception, the
>>>>>>> offending bulb was determined to be the Utilitech.
>>>>>>>
>>>>>>
>>>>>>
>>>>>>>
>>>>>> I replaced the the the Utilitech bulbs with Sylvania OSRAM, and the
>>>>>>> RFI on channel 10 OTA was eliminated.
>>>>>>>
>>>>>>
>>>>>>
>>>>>>>
>>>>>> The Sylvania OSRAM part number used is LED8.5A19/DIM/0/827/G5/RP as
>>>>>>> printed on the box UPC, and were purchased from LOWEs also.
>>>>>>>
>>>>>>
>>>>>>
>>>>>>>
>>>>>> NOTE: There may be interference from Sylvania OSRAM bulbs on other
>>>>>>> frequencies. LED bulbs are required to meet FCC Part 15 FCC, Class B
>>>>>>> regulations.
>>>>>>>
>>>>>>
>>>>>>
>>>>>>>
>>>>>> YMMV
>>>>>>>
>>>>>>
>>>>>>
>>>>>>>
>>>>>> I have not seen a comprehensive report or article that unveils “good”
>>>>>>> vs “bad” LED bulb manufacturer and part identification as far as RFI
>>>>>>> emissions across the spectrum.
>>>>>>>
>>>>>>
>>>>>>
>>>>>>>
>>>>>> Ben W4SC
>>>>>>>
>>>>>>
>>>>>> ______________________________________________________________
>>>>>>>
>>>>>>
>>>>>> Elecraft mailing list
>>>>>>>
>>>>>>
>>>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>>>>>
>>>>>>
>>>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>>>>>
>>>>>>
>>>>>> Post: mailto:[hidden email]
>>>>>>>
>>>>>>
>>>>>>
>>>>>>>
>>>>>> This list hosted by: http://www.qsl.net Please help support this
>>>>>>> email
>>>>>>>
>>>>>>
>>>>>> list: http://www.qsl.net/donate.html Message delivered to
>>>>>>>
>>>>>>
>>>>>> [hidden email]
>>>>>>>
>>>>>>
>>>>>>
>>>>>> ______________________________________________________________
>>>>>>
>>>>>> Elecraft mailing list
>>>>>>
>>>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>>>>
>>>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>>>>
>>>>>> Post: mailto:[hidden email]
>>>>>>
>>>>>> This list hosted by: http://www.qsl.net
>>>>>>
>>>>>> Please help support this email list: http://www.qsl.net/donate.html
>>>>>> Message delivered to [hidden email]
>>>>>>
>>>>> ______________________________________________________________
>>>>> Elecraft mailing list
>>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>>> Post: mailto:[hidden email]
>>>>>
>>>>> This list hosted by: http://www.qsl.net
>>>>> Please help support this email list: http://www.qsl.net/donate.html
>>>>> Message delivered to [hidden email]
>>>>>
>>>>>
>>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to [hidden email]
>>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

Charlie T, K3ICH

Re: OT: LED Light Bulbs

In reply to this post by Jim Brown-10

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 from 12 feet to 150 feet.
Admittedly, I have never actively gone so far as to turn off each one individually, but I don’t seem to notice any extra RFI anywhere.
There ARE a couple dimmers that raise holy heyull, but I make sure those are off when operating.

That said, it may be an eye-opener for me to have my wife selectively switch the LED's on/off while I listen to the bands.

73, Charlie k3ICH

As a side note (to an already off topic thread), I bought a couple timer switches that do NOT use dimmer type (= NOISY) switching.
They are Intermatic, "Heavy Duty Timer", model ST01K, about $30 at Home Depot.
They use a latching relay and are battery powered (CR-123) which is supposedly good for about three years.
They have their own clock/timer that runs regardless if the AC is on or off, and also takes into account daylight savings time.
They replace regular wall switches and I use them to control the living room lights and circulating fans in the winter for the wood burner in the basement.
They can be programed for four different modes with two variables, Time on/time off, and/or Dusk on/Dusk off.
The living room lights are set for dusk ON, and 2300 OFF.
That way I don't have to monkey with a mechanical timer, resetting as sunset varies or we lose the juice in a storm.
The fan control is set to come on at 0630 and go off at 2330.
During the summer, the fan switch is in its manual mode (OFF), because they're only needed in the winter.
Another nice feature is an override button which when punched will change the state of the powered device.
They're somewhat of a bear to program, but they DO exactly what they're supposed to AND, except for the initial ON or OFF switching, make absolutely NO RF noise.

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

Bob McGraw - K4TAX

Re: OT: LED Light Bulbs

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 antenna {dual band VHF/UHF} some 6 ft away from the lamp and
the receive antenna {connected to a spectrum analyzer with a similar
dual band VHF/UHF antenna}, about 6 ft from the lamp. In all cases no
noise above background noise was observed. 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 worse than others.

73

Bob, K4TAX

K3S s/n 10163

On 10/24/2017 7:45 AM, Charlie T wrote:

> 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 from 12 feet to 150 feet.
> Admittedly, I have never actively gone so far as to turn off each one individually, but I don’t seem to notice any extra RFI anywhere.
> There ARE a couple dimmers that raise holy heyull, but I make sure those are off when operating.
>
> That said, it may be an eye-opener for me to have my wife selectively switch the LED's on/off while I listen to the bands.
>
> 73, Charlie k3ICH
>
> As a side note (to an already off topic thread), I bought a couple timer switches that do NOT use dimmer type (= NOISY) switching.
> They are Intermatic, "Heavy Duty Timer", model ST01K, about $30 at Home Depot.
> They use a latching relay and are battery powered (CR-123) which is supposedly good for about three years.
> They have their own clock/timer that runs regardless if the AC is on or off, and also takes into account daylight savings time.
> They replace regular wall switches and I use them to control the living room lights and circulating fans in the winter for the wood burner in the basement.
> They can be programed for four different modes with two variables, Time on/time off, and/or Dusk on/Dusk off.
> The living room lights are set for dusk ON, and 2300 OFF.
> That way I don't have to monkey with a mechanical timer, resetting as sunset varies or we lose the juice in a storm.
> The fan control is set to come on at 0630 and go off at 2330.
> During the summer, the fan switch is in its manual mode (OFF), because they're only needed in the winter.
> Another nice feature is an override button which when punched will change the state of the powered device.
> They're somewhat of a bear to program, but they DO exactly what they're supposed to AND, except for the initial ON or OFF switching, make absolutely NO RF noise.
>
>
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

NK7Z

Re: OT: LED Light Bulbs

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 quiet. Who knows what the next run will bring...

73s and thanks,
Dave
NK7Z
http://www.nk7z.net

On 10/24/2017 05:55 AM, Bob McGraw K4TAX wrote:

> 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 antenna {dual band VHF/UHF} some 6 ft away from the lamp and
> the receive antenna {connected to a spectrum analyzer with a similar
> dual band VHF/UHF antenna}, about 6 ft from the lamp. In all cases no
> noise above background noise was observed. 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 worse than others.
>
> 73
>
> Bob, K4TAX
>
> K3S s/n 10163
>
>
> On 10/24/2017 7:45 AM, Charlie T wrote:
>> 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 from 12 feet to 150 feet.
>> Admittedly, I have never actively gone so far as to turn off each one
>> individually, but I don’t seem to notice any extra RFI anywhere.
>> There ARE a couple dimmers that raise holy heyull, but I make sure
>> those are off when operating.
>>
>> That said, it may be an eye-opener for me to have my wife selectively
>> switch the LED's on/off while I listen to the bands.
>>
>> 73, Charlie k3ICH
>>
>> As a side note (to an already off topic thread), I bought a couple
>> timer switches that do NOT use dimmer type (= NOISY) switching.
>> They are Intermatic, "Heavy Duty Timer", model ST01K, about $30 at
>> Home Depot.
>> They use a latching relay and are battery powered (CR-123) which is
>> supposedly good for about three years.
>> They have their own clock/timer that runs regardless if the AC is on
>> or off, and also takes into account daylight savings time.
>> They replace regular wall switches and I use them to control the
>> living room lights and circulating fans in the winter for the wood
>> burner in the basement.
>> They can be programed for four different modes with two variables,
>> Time on/time off, and/or Dusk on/Dusk off.
>> The living room lights are set for dusk ON, and 2300 OFF.
>> That way I don't have to monkey with a mechanical timer, resetting as
>> sunset varies or we lose the juice in a storm.
>> The fan control is set to come on at 0630 and go off at 2330.
>> During the summer, the fan switch is in its manual mode (OFF), because
>> they're only needed in the winter.
>> Another nice feature is an override button which when punched will
>> change the state of the powered device.
>> They're somewhat of a bear to program, but they DO exactly what
>> they're supposed to AND, except for the initial ON or OFF switching,
>> make absolutely NO RF noise.
>>
>>
>>
>>
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

Jim Brown-10

Re: OT: LED Light Bulbs

In reply to this post by Bob McGraw - K4TAX

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 worse than others.

Sounds like classic received and re-radiated intermod, Bob. W3LPL has
chased this down, and I've observed it in our CW contesting trailer. Set
up in the middle of nowhere, no issues with transmitter harmonics or
intermod. Set up anywhere around civilization, strong harmonics and
intermod.

73, Jim K9YC

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

Bob McGraw - K4TAX

Re: OT: LED Light Bulbs

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 receive. But as
Jim, K9YC says, this may happen when a nearby transmitter is active, the
nearby receiver is plagued with noise.

Clearly the CFL devices I used for testing did produce many more and
higher level harmonics than the LED devices. I did not have a large
sample of lamps, but the ones used, did show issues with the LED units
showing less than CFL's.

73

Bob, K4TAX

On 10/24/2017 11:05 AM, Jim Brown wrote:

> 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 worse than others.
>
> Sounds like classic received and re-radiated intermod, Bob. W3LPL has
> chased this down, and I've observed it in our CW contesting trailer.
> Set up in the middle of nowhere, no issues with transmitter harmonics
> or intermod. Set up anywhere around civilization, strong harmonics and
> intermod.
>
> 73, Jim K9YC
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

kstover

Re: OT: LED Light Bulbs

In reply to this post by Bob McGraw - K4TAX

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 it is. Now
you have to find one that can wire the faucet too. One step too far.

The wife's quilting machine is next. it's going to get the K9YC treatment.

On 10/24/2017 7:55 AM, Bob McGraw K4TAX wrote:

--
R. Kevin Stover AC0H
FISTS #11993
SKCC #215
NAQCC #3441
ARRL
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]