D. Peter Maus wrote:
On 10/20/09 12:35 , Bill Baka wrote:

Second, I have to mention that those el-cheapo CFL's that Wal-mart is
selling have one hell of an RFI output. I thought my radio had gone down
when I thought to turn off all the CFL's in my house and it got
listen-able. I have an oscilloscope monitoring the audio and the noise
spikes are at 60 Hz and very consistent.

I think that if someone wanted to get into their radio it would be a
small matter to put a line synced blank pulse when needed.



A late thought, here....have you put a bit of capacitance across the
lamp?

I've thought of a lot of things but the capacitor needs someplace for me
to put it. I was hoping the F.C.C. would have been bright enough to
regulate a noise maximum but no, we get HDTV during a Depression.

I had a torchiere in the studio that was creating some enormous
spikes on the line, and was getting back into the audio. Eventually, I
pulled the SCR fader out.

SCR's are terrible for noise. I had one on a filament lamp for the
bedroom ceiling and as I dialed the bright up and down I could hear the
change in the radio.

But a quick short term solution was to put a
capacitor across the line. Put an orange drop in a 3 to 2 line adaptor,
and plugged it into the power strip. Quieted things right down. Even
elimated spikes that were getting into my AM receiver.

Cheap solution. Good results.



Sounds good for a few fixes but I don't want to do it for every bulb in
the house. Someone should make a noise reduction socket piece that the
CFL would plug into. I'm thinking 2 inductors and 2 capacitors.

Bill Baka