[ARC5] Adventures in Battery Ops - filters.

[Dennis Monticelli]

I have run across plenty of neighborhood RFI but not from a touch lamp,
thankfully.  Actually, the RFI went the other way.

My next door neighbor used to have a touch lamp downstairs.  I usually
operated at night and could turn it ON with only 100W, after which it would
stay on.  My neighbor would get up in the morning, go downstairs and the
light would be ON.  He would scratch his head and vow to insure it was
turned off before he went to bed.  But most mornings he would find it ON.
Growing tired of this and assuming the lamp was flaky, he got rid of it.

Moral of the story: Unlike phones and stereos touch lamps don't talk so
hams don't take the blame.

Dennis AE6C

On Fri, Apr 10, 2015 at 4:23 PM, Scott Robinson <spr at earthlink.net> wrote:

> BE glad your neighbors don't have 'touch lamps' or you'd be buried in
> noise.
>
> /scott
>
>
> On 4/10/15 3:46 PM, Bill Cromwell wrote:
>
>> 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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