In article ,
Nobody wrote:

In article ,
Nobody wrote:

McFerg wrote:
These new energy efficient household bulbs really cause a lot
interference on my medium wave and the lower short wave bands.
Is there anything I can do to eliminate it, short of switching
back to the old filament type


I'd switch brands. I have, in over 20 years of using small
fluorescents, found very few that made electrical noise. What
brand lamps are you using? You're not trying to use them with
dimmers, are you?


Agreed... I've had mini-fluors in a standard lamp and a table
lamp, both within a metre either side of my Eton E1, for several
years with only one instance of a "noisy" tube. That's now in a
lamp in another room where it's seldom turned on.

Those are not the same thing as the CFL's being discussed. The older
lamps have low frequency ballasts where the only radio noise they
generate is at startup. The noise stops as soon as the bulb plasma
is conducting.

The current generation of high efficiency bulbs use a high frequency
oscillator to excite the plasma in the bulb and this is a constant
source of interference depending on brand and location. This is an
insidious problem because it is location dependent.

Er, am I dumb or what?

My response refers to Dave's answer "in over 20 years of using
small fluorescents..." and your own response to the OP McFerg where
you also refer to "screw type florescence" (sic).

This household uses several newer/older (or older/newer) minis, as I
say with only ONE RFI problem.

I will add that my Eton is "mains powered", not battery.

Yes you are mistaken. The discussion is the new energy efficient type.

--
Telamon
Ventura, California