What are some of the interferences out there that mess up SW?? It seems
that everytime I have my laptop on it get a high pitch tone.

EF

"E.F." wrote in message
news:FbA6f.1823$mV4.1158@dukeread02...
What are some of the interferences out there that mess up SW?? It seems
that everytime I have my laptop on it get a high pitch tone.

EF
Well that's One.
The power supply is Two
Any digital clock radio
Fluorescent lighting
actually, the list is endless.

Brad.

On Sun, 23 Oct 2005 10:58:26 +1000, "Brad" bradvk2qq AT w6ir.com
wrote:



"E.F." wrote in message
news:FbA6f.1823$mV4.1158@dukeread02...
What are some of the interferences out there that mess up SW?? It seems
that everytime I have my laptop on it get a high pitch tone.

EF
Well that's One.
The power supply is Two
Any digital clock radio
Fluorescent lighting
actually, the list is endless.

Brad.
Re-e-e-e-a-lly...

What frequency is that fluorescent lighting on?

David wrote:

On Sun, 23 Oct 2005 10:58:26 +1000, "Brad" bradvk2qq AT w6ir.com
wrote:



"E.F." wrote in message
news:FbA6f.1823$mV4.1158@dukeread02...
What are some of the interferences out there that mess up SW?? It seems
that everytime I have my laptop on it get a high pitch tone.

EF
Well that's One.
The power supply is Two
Any digital clock radio
Fluorescent lighting
actually, the list is endless.

Brad.
Re-e-e-e-a-lly...

What frequency is that fluorescent lighting on?

Lots of them!

dxAce
Michigan
USA

"David" wrote in message
...
On Sun, 23 Oct 2005 10:58:26 +1000, "Brad" bradvk2qq AT w6ir.com
Any digital clock radio
Fluorescent lighting
actually, the list is endless.

Brad.
Re-e-e-e-a-lly...

What frequency is that fluorescent lighting on?

can you say Hash? Particularly those little compact beasties.

Bad.

Brad wrote:

"David" wrote in message
...
On Sun, 23 Oct 2005 10:58:26 +1000, "Brad" bradvk2qq AT w6ir.com
Any digital clock radio
Fluorescent lighting
actually, the list is endless.

Brad.
Re-e-e-e-a-lly...

What frequency is that fluorescent lighting on?

can you say Hash?

I'm sure he can. He's probably smoking it.

dxAce
Michigan
USA

"dxAce" wrote in message
...


Brad wrote:

"David" wrote in message
...
On Sun, 23 Oct 2005 10:58:26 +1000, "Brad" bradvk2qq AT w6ir.com
Any digital clock radio
Fluorescent lighting
actually, the list is endless.

Brad.
Re-e-e-e-a-lly...

What frequency is that fluorescent lighting on?

can you say Hash?

I'm sure he can. He's probably smoking it.

dxAce
Michigan
USA

Now, I'm going to do a Cuhulin mindless ramble here.......
A neighbour appeared on my back doorstep one evening a year ago and started
verbally abusing my wife for the interference to her television ever since
we moved it. She was going to get someone to track it down, it had just
started again a few minutes ago and it was ALL OUR FAULT!

I was still driving home at the time, my gear was off so it wasn't me. When
I got home, I grabbed my trusty FT817 and started sniffing. Lots of
crackling, arcing noises, peaking on high band VHF, but a problem all the
way down to 80m and below. I had always considered it an arcing insulator
and so I just lived with the problem.

I tracked the fault down to the streetlight in front of my house. It was
arcing and flickering and there was a static crash every time. I wrote a
love letter to the neighbour that I had tracked the noise down for her, and
gave her the report number from the electricity company. The lamp and
housing was replaced by noon the next day. Next evening at 7:10pm, the
street lights came on and it was all quiet. Ahh bliss. All my low band
problems solved. Her TVI problems solved.

Has the bitch said a word to me since? No.

Brad.

On Sun, 23 Oct 2005 12:03:27 +1000, "Brad" bradvk2qq AT w6ir.com
wrote:



"David" wrote in message
.. .
On Sun, 23 Oct 2005 10:58:26 +1000, "Brad" bradvk2qq AT w6ir.com
Any digital clock radio
Fluorescent lighting
actually, the list is endless.

Brad.
Re-e-e-e-a-lly...

What frequency is that fluorescent lighting on?

can you say Hash? Particularly those little compact beasties.

Bad.


A magnetic ballast lamp puts out hash. A modern compact fluorescent
operates very quietly except for one discreet band where there is some
potential for interference. Not nearly as much of a problem as light
dimmers at the neighbors.

On Sat, 22 Oct 2005 19:46:51 -0400, "E.F." wrote:

What are some of the interferences out there that mess up SW?? It seems
that everytime I have my laptop on it get a high pitch tone.

EF

The inverter that powers the backlight on the display is the likely
culprit. It is kind of like the Horizontal output on a TV, nice saw
tooth wave with harmonics that reach well into the HF spectrum.

Just about every other clock inside the computer runs at frequencies
well above HF.

On Sat, 22 Oct 2005 21:57:43 -0700, matt weber
wrote:

On Sat, 22 Oct 2005 19:46:51 -0400, "E.F." wrote:

What are some of the interferences out there that mess up SW?? It seems
that everytime I have my laptop on it get a high pitch tone.

EF

The inverter that powers the backlight on the display is the likely
culprit. It is kind of like the Horizontal output on a TV, nice saw
tooth wave with harmonics that reach well into the HF spectrum.

Just about every other clock inside the computer runs at frequencies
well above HF.
The vertical waveform in the TV is the one that causes all the
buzzing.