[Elecraft] OT: LED Light Bulbs

[Dave Cole (NK7Z)]

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 <Hamshack at 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.  I did carefully checkout some 
>>>> Walmart "100 W" LED lights before committing to them and they were 
>>>> fine.
>>>>
>>>>
>>>> _________
>>>>
>>>> 73,
>>>>
>>>> Jim - N4ST
>>>>
>>>> -----Original Message-----
>>>> From: elecraft-bounces at mailman.qth.net 
>>>> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Bob McGraw K4TAX
>>>> Sent: Saturday, October 21, 2017 11:32
>>>> To: elecraft at 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 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
>>>>
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>>>>> rmcgraw at blomand.net
>>>>
>>>>
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