[ARC5] Adventures in Battery Ops - filters.

[Bill Cromwell]

Hi Wayne,

Radiated rf interference won't be reduced by using batteries to power 
your radios. Only interference that is conducted via the power lines. 
There are two shops  withing a quarter mile of me that have arc welding 
equipment. I can hear them when they are welding. I have been surprised 
about the low level of noise. Neighbors 'appliances' seem to be the 
worst of it.

73,

Bill  KU8H


On 04/10/2015 05:49 PM, Robert Eleazer wrote:
> Several years ago (like 16 or 17, I think) I installed some Halogen lights in the Kitchen/Den area.  I later found out that whenever they were turned on they wiped out everything between the AM broadcast band and 6 meters.  I assumed that it was due to some kind of a poor connection, although I could see nothing wrong.
>
> The lights quit working a few weeks back.  Instead of 12V it was down to 7V under load,.  That is when I discovered that the power supply was not a simple transformer as I had assumed but must be a switcher.  It's not very big but is rated at 60VA.  I figured I would just use a transformer to replace it but found that all I had in stock were either physically too large or electronically too small. I ordered a 60VA one for $3.36 from ebay and I guess next I'll put it in.  But I realize now that the extended output power lines going to the lights from the original one were no doubt acting as antennas to broadcast the noise it was generating.  So the noise does not have to be coming from the power lines.  Don't know what the new power supply will do but I'll be finding out.
>
> Maybe I should switch to new LED lights.
>
> Wayne
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