[RFI] LED Bulbs RFI

[WD8ARZ]

Thanks for sharing that info Kurt - Its that kind of detail on a product 
result that the rest of us can benefit from.

Thank You - 73 from Bill - WD8ARZ
South Bend, Indiana

On 2/9/2016 6:19 PM, KD7JYK DM09 wrote:
> : Nevertheless he said for folks having interference problems they recommend
> : the installation of a Corcom filter model 10VK6.  Just connect this up
> : between the output of the transmitter and the underground wire loop that
> : connects to it.  Sounds like this will function similar to my home brew
> : filter.  I will buy one myself and see how it compares to my filter.
>
> Interesting....
>
> Along such lines, perhaps someone can explain this to me.
>
> I've been playing with LED light bulbs and swapping out the old bulbs in the
> house.
>
> To test for noise, I made up a simple setup on the bench.  It's a 6'
> three-wire cord with spade connectors on the end.  The wires in the cord are
> twisted.  I have a socket that I can plug into the end of the cable and
> screw in a light bulb.  Of the three wires, the green wire- ground, is not
> used with the light socket.
>
> The bulb I was testing at the time was the 100W equivalent "Great Value"
> brand from WalMart.
>
> I plug it in, the light lights up.  Sweeping a portable shortwave RX along
> the bulb and line, RFI is noted at the bulb itself and for about 2" down the
> cord and nothing along the cord.  RFI is not detected at the bulb more than
> about 2".  A surprisingly quiet bulb.  I have nine in the shop now with no
> issues.
>
> What I wanted to test was the possibility of using any garbage generic brand
> LED bulb and use an RFI filter at the socket.  I have a couple dozen of
> various manufacture, two and three wire jobs, all in sealed steel cans of
> various current ratings.  Some of the filters and new, some used.
>
> In each an every case, with a filter installed, whether two or three wires
> at the input connected, the entire line cord blasted RFI!  It was not only
> along the entire length, but could be heard a couple feet away from the line
> cord and back-fed into the house wiring rendering radio ops useless.
>
> No filter, a bulb, wire, not an issue, filter, psycho-RFI-bomb.
>
> Ideas? - Kurt