[Elecraft] Fluorescent RFI solved

[David Gilbert]

The "Edison" LED bulbs (also called "filament LED" bulbs) are thin 
strips of glass with lots of short wavelength LEDs mounted on the strip, 
with a coating of phosphor over all of it.  The high energy light from 
the LEDs activates the phosphor, which then radiates the color 
determined by the phosphor.  I don't know for sure, but I wouldn't be 
surprised if all the LED chips are wired in series, which might make it 
possible to run off 120 VAC without any power supply at all in the 
base.  I think blue LEDs have enough slope in their I-V curve to handle 
any normal variation in the AC voltage. That would make them very quiet 
RFI-wise.

73,
Dave   AB7E



On 11/26/2022 4:09 PM, jerry wrote:
> There are also Edison-based LED bulbs specifically made to be RF-quiet
> for garage door openers.
>
>                  - Jerry, KF6VB