Since your room is not shielded and the power not filtered you should
measure a real incandescent bulb at the same distance. It is possible you
are just measuring conducted noise from other equipment.
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net
-----Original Message-----
From: RFI [mailto:rfi-bounces@contesting.com] On Behalf Of Ron Watson
Sent: Sunday, September 20, 2015 02:00
To: rfi@contesting.com
Subject: Re: [RFI] New bulb? Acandescence in Finallly bulb
I made some measurements today and put the files in a zip file available at
the link below.
Instead of the 1 inch loop at 1" distance (I think that was what I made
leakage tests at in the past) I used a 2 turn 30mm loop spaced about 15 mm
for these sweeps. The picture labeled 0.jpg is with the light off, just my
radio room noise for the bandwidth which is fairly high with all the normal
stuff running. No quiet room here.
About the only thing of notice was mid 20 meter band and this moves around
some and at a different frequency at each lamp startup. If I feed the test
setup directly to my receiver this would be about S-9 or 50uv. I don't know
if a 50uv output from my signal generator to this loop would make it to the
outside antenna or if the radio case would have enough leakage to hear it.
I plan to put 3 of these in the roof fixture in the radio room when I get to
where I can raise my arms again and can check it out. If someone has the
bulbs in a fixture, they can dial around the mid 20 meter band and let us
know, it may be sometime before I can reach my ceiling again.
http://www.mediafire.com/download/ytq8301a7nxl1v5/SA_files.zip
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