[RFI] Singing Floodlights

[Jim Smith]

    Larry,
can you tell us exactly what kind of lamps these are? Are they on a dimmer,
and if so, what type?
Jim Smith, KQ6UV

----- Original Message -----
From: "Larry Burke WI5A" <lburke@wt.net>
To: <rfi@contesting.com>
Sent: Friday, July 07, 2000 6:47 PM
Subject: [RFI] Singing Floodlights


>
>
> This is not technically an RFI problem, but it's somewhat related. I have
> four 75 watt recessed floodlights in the ceiling of my shack. As they age
> and get ready to burn out they produce a singing sound for several days...
> then poof. What causes the noise?  Also... the lights seem to experience
> sympathy pains... when one goes out the others are not far behind. Is the
> later problem due to the increased voltage present when the first one
blows
> or what? I wouldn't have thought the increase was enough to cause a
problem.
>
> Perspiring minds want to know.
>
> Larry Wi5A
>
>
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