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?