[RFI] LED lighting

[Roger (K8RI)]

Accelerated aging is complicated. What parts change with age, what 
change with temperature + and -.  It's part science and part guessing game.

73

Roger  (K8RI)


On 7/27/2015 11:19 AM, qrv at kd4e.com wrote:
> Does the ARRL perform aging-simulation tests?
>
> Many of us have experienced heat-fatigue and/or vibration
> fatigue failures in poorly-soldered connections - especially
> since the era/error of lead-free solder - not to mention
> poor quality components that fail early - these experiences
> are across a variety of Chinese-built products.
>
> The concern is that a new-off-the-shelf device may appear
> fine vis-a-vis RFI today and become a nuisance a month or a
> year down the road.
>
> Just curious ... David KD4E
>
>> I bought one multi-LED bulb that came from China.  It was dead quiet.
>> My guess is that it simply put the LEDs in series and connected them
>> to the line.  Not all of them will have a switcher in them.
>>
>> ARRL tested a number and found them to be below the conducted
>> emissions limits. I want to test them above 30 MHz too, for radiated
>> emissions, though we'd need to set up outdoors to prevent scatters
>> from throwing off the readings.
>>
>>
>> Ed Hare, W1RFI ARRL Laboratory Manager 225 Main St. Newington, CT
>> 06111 Tel: (860) 594-0318 Fax: (860) 594-0259 Email: W1RFI at arrl.org
>> Member: IEEE Connecticut Section Member: IEEE EMC Society, Board of
>> Directors Member: IEEE EMC Society Standards Development and
>> Education Committee Primary representative:  ANSI ASC C63 EMC
>> Committee, Vice Chair Subcommittee 5 (Immunity) Member: QRP Amateur
>> Radio Club International, Board of Directors
>


---
This email has been checked for viruses by Avast antivirus software.
http://www.avast.com