[R-390] Turn off the light !

[joldenburg2 at new.rr.com]

Had a similar experience this past weekend. Was working on a Hammarlund HQ-120X receiver and had S-8 background noise. I shut off the two tubular fluorescent shop lights in the adjoining room, now S-7. On a whim I cut the shop lights ( it was day time and the bench is in front of a 9-foot window<grin>) and what do you know all the hash was gone. Ends up the compact fluorescent's contain toroid's making for a small noisy switching power supply. Tm to hoard Edison style incandescent for the shop.

interesting side note. Folks raising poultry are also getting upset as incandescent bulbs are used for heat sources in incubators and brooders for their chicks.
 Jon AB9AH

---- Pete Williams <jupete at internode.on.net> wrote: 

=============
 Energy Saving Lamps. seems to produce
enough EMR to  upset the  delicate innards of the  xstr bridge.
Pete VK3IZ
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Jon Oldenburg AB9AH
"A bicycle can't stand on it's own because it is two tired..."