For my bulb testing I do 2 things.
1) There is a particular second floor light where the run to the light
runs ~ 25ft horizontal parallel to the upper segment of my HF antenna at
a distance of ~ 35ft. This particular run couples well to the antenna
on the lower bands so I run incandescent only there.
This is the location I will swap in a LED or CFL to look at real world
inpact.
2) I have a dangly light bulb socket (you know old hanging type) wired
to a std plug.
I hang the light in the shack and connect to a 50 foot run across the house.
Then I throw a noise loop on the end of a 70ft chunk of LMR240 and
connect to the spec-an in peak-hold mode or the HF receiver and start
waving the loop around the bulb and on down the line.
These would both be field expedient / situation specific but I find them
useful for quick/dirty separation of "do not ever use" from "might be OK"
On 11/10/16 08:15, Greg Troxel wrote:
> Jim Brown <jim@audiosystemsgroup.com> writes:
>
>> Outside of compliance test labs, our concern is NOT to determine
>> compliance with FCC Rules for emissions, which are not necessarily a
>> good indicator of the extent to which a given device will radiate
>> enough noise into our antennas to be problematic.
>
> Certainly I didn't mean part 15 compliance was good enough.
>
> What I was getting at is that while I can install a device where I would
> use it and turn it on and off and see if I can hear it, I wonder if
> there is some reasonable path to make measurements so that someone else
> can predict if it will bother them, based on similar measurements of
> other devices and knowing the effect of other devices. We now have a
> lot of "I couldn't hear it" statements, which aren't comparable or
> quantitative.
>
> So I wonder if something like a LISN but different - that simulates some
> standard conditions that you think are realistic and useful - is
> plausible. I suppose that's asking you to redo the entire engineering
> practice around testing to more closely align test results and actual
> problems, which is a big request.
>
> Given your comments about green wires, I wonder if some sort of
> LISN-like device with a measurement tap on the green wire is
> appropriate, or some kind of transformer from the complete power cord as
> a pickup.
>
> (In my LED testing, I have used a lamp with only phase/neutral wires and
> not even a grounded frame, because that's what was in front of me.)
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