wrote:
RFI:
This is not intended to be a complete list of RFI sources, I doubt if
enough paper exists for
such a list! But it should give readers an idea of noise sources.

Terry

My Dad had an aquarium heater with a neon lamp that destroyed my MW
listening when I was a kid.

Also, the neon lamp in a lighted doorbell button can become a random HF
static generator audible for a hundred feet or more.

Solid state motion detector lamp controllers are also very odious. The
ones from Grainger with a relay are OK.

On Nov 28, 9:39 am, David wrote:
wrote:
RFI:
This is not intended to be a complete list of RFI sources, I doubt if
enough paper exists for
such a list! But it should give readers an idea of noise sources.

Terry

My Dad had an aquarium heater with a neon lamp that destroyed my MW
listening when I was a kid.

Also, the neon lamp in a lighted doorbell button can become a random HF
static generator audible for a hundred feet or more.

Solid state motion detector lamp controllers are also very odious. The
ones from Grainger with a relay are OK.

Like I said, this isn't a complete list. When I build a web page I
will add RFI
sources as they are mentioned. This would be a good place for people
to start
listing any sources I neglected.

Along with aquarium heaters, we have to add "hot rocks" for lizards.
And along with door bell neons, there are many power strips with neons
either in the power switch or a separate power indicator.

I have a list of several hundred and only picked the most common.

A friend had an AC powered ion smoke detector that was an amazing
broadband RFI source!

Terry

On Nov 28, 9:39 am, David wrote:

My Dad had an aquarium heater with a neon lamp that destroyed my MW
listening when I was a kid.

Also, the neon lamp in a lighted doorbell button can become a random HF
static generator audible for a hundred feet or more.

Solid state motion detector lamp controllers are also very odious. The
ones from Grainger with a relay are OK.

I failed to include the latest wrinkle in heat pumps.

The single phase 60Hz is converted to variable frequency

3 phase to drive both the compressor and the blower.

The better units use 2 converters, each optimized for
the motor it is driving.

These are very efficient, but the 11 I have seen have
all had intense RFI that will be very difficult to reduce.

I also neglected to mention exterior "security" lights.
Both Mercury and "low pressure Sodium" lights can be
major RFI offenders. In my experience the photo eclectic
controllers can be nasty RFI sources even when the light
is off.

Terry

Lots of info on RFI at AC6V's site URL:
http://ac6v.com/techref.htm#RFI

Lamont

On Nov 28, 11:22 am, "The Shadow" wrote:
Lots of info on RFI at AC6V's site URL:http://ac6v.com/techref.htm#RFI

Lamont

Thanks for the link, somehow in my hours of wasted net searches I
missed that one.

Terry