On 6/5/2012 10:37 AM, Jeff Liebermann wrote:
On Tue, 5 Jun 2012 09:00:11 -0400, "
wrote:

I finally got back to checking and the noise is louder and when unhooking
the tuner (which is attached to the dipole) the noice immediately goes away.

Does "unhooking the tuner" mean that you've unplugged the antenna lead
from the plasma TV, or that you turned off the plasma TV? If the RFI
is really coming from the antenna connection of the TV, a simple 54MHz
high pass filter should be sufficient to reduce the RF emissions at HF
frequencies to tolerable levels. However, I think turning off the TV
would be better.

Yesterday was about S9 or S10 of constant noice coming over all the bands on
the HF.

I was playing with a Heathkit GC-1000 WWV clock a few nights ago.
Reception was horrible and there seemed to be a rather high noise
level. I turned off everything I could think might be the culprit and
the noise was still there. I gave up for the evening. When I turned
off the room lights, the noise went away. One LED lamp turned out to
be the culprit:
http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?productId=203088292
I have 3 of these running, but only one of them generates RFI.


So far the best light (warm white), best efficiency and relatively low
noise seems to be from Philips LED bulbs. The ones that have the orange
top are the best. Nothing else comes close. In Minnesota I think there
is a deal going on with Home Depot and the power company because the 60W
Philips bulbs that are normally $40 online everywhere have been $15 at
Home Depot (here) for months.

They are much better than any other LED Edison style bulb I have
purchased, and I've bought quite a few trying to figure out what's good.

The best price/performance is at the 60W level where the $15 bulb
produces 810 lumens for 12W with color rendering at something like 80.
The better version of the bulb does 1100 lumens (or so, can't remember
the number exactly) for only 10W and has about a 99 color rendering
rating. And is $50, only available online. I'd love having that one,
but the math doesn't work out even if I have it for 30 years. I'll wait
for the price to go down.

tom
K0TAR
tom
K0TAR
tom
K0TAR