[Elecraft] LED Lamps and HF RFI?

[brian]

How far are your antennas from the bulb?

For a while I experimented with attic antennas.   I heard junk from the 
washing machine, treadmill and lots of other unidentifiable sources.
Using outdoor coax fed antennas 65' or more away received none of them.

One guy put an LED bulb in his garage.   It drove the garage door opener 
nuts.

73 de Brian/K3KO
On 5/12/2015 2:39 AM, Joe Subich, W4TV wrote:
>
> I just replaced a couple old 65W equivalent CFL floods in 6" cans
> located in a bathroom with retrofit LEDs and have not noticed any
> increase in noise.  The retrofit LEDs have an adapter that screws
> in in place of the incandescent/CFL bulb.  The replacement unit
> simply snaps in place of the old trim ring and plugs into the
> adapter.
>
> The units I used were Utilitech from the local Lowes.  I did not
> use replacement power supplies and rewire the fixtures.  If needed
> I can go back to the CFL or conventional incandescent floods just
> by unscrewing the adapter, screwing in CFLs and replacing the trim
> ring.
>
> The new fixtures are significantly brighter than the 10 year old
> CFL bulbs.  I'm planning to replace another half dozen mixed CFL
> and incandescent floods with the LED retrofits over the next few
> months.
>
> 73,
>
>    ... Joe, W4TV
>
>
>
> On 2015-05-11 10:13 PM, Dauer, Edward wrote:
>> Had an electrician at the operating QTH today to discuss replacing the
>> recessed ³can² lighting throughout the house.  He suggested replacing 
>> the
>> incandescent cans (now 65 watts per bulb) with LED lamps (same lumens 
>> with
>> 10-13 watts per bulb).  I have looked at the Internet on the question of
>> RFI from LED bulbs and see wildly inconsistent reports.  It is the case
>> that HF radios like the K3 have LEDs in their panels; but I would be
>> installing as many as 60 LED fixtures running at 10-13 watts each.  My
>> caution comes from my novice days in the 50s when a single fluorescent
>> lamp put my hamming out of business - things were quiet when the only
>> light source was the filament of a 6146 and the dial lamps on the 
>> HQ-100.
>> I know that LEDs aren¹t at all the same; but I don¹t want to relamp the
>> house if it puts me off the air.  And if they (or their power 
>> supplies) do
>> generate RFI in the HF bands, would the K3¹s NR get rid of it? Anyone
>> have any good data on this?
>>
>> Tnx,
>>
>> Ted, KN1CBR
>>
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