ClearSpeech speakers probably won't work on this kind of noise. They need
consistent noise to be most effective, not on-off-on-off noise.

I would also check stuff in your house first before going to the neighbor.


"Dave Platt" wrote in message
...
It's my home setup. I have an Icom 706 and the DSP and blanker helps
but the pulse noise (maybe s3) is annoying. It appears to be coming
from a neighbor's house.

The most effective solution would probably be to enlist your
neighbor's assistance, find the offending device, and figure out some
sort of a noise suppression which could be done at the source.

Fairly common culprits for this sort of periodic impulse noise are
fish-tank heaters (noise occurs when the thermostat turns the heater
on or off), pulse-type electric-fence energizers (partial short
circuits of the "hot" fence wire to ground can cause such noise), and
certain types of battery-charger.

A noise filter which plugs in between the offending device, and the
AC wall socket, may be the least expensive and most effective
solution. If you're on tolerably good terms with your neighbor, and
are willing to pay for the filter (even though dealing with the noise
is technically the neighbor's responsibility), this is the approach
I'd recommend. [I wouldn't recommend actually making any
modifications to the neighbor's equipment yourself, for liability
reasons... just supply a filter and let the neighbor plug it in.]

You could try dealing with the noise at the audio-output level using a
ClearSpeech or similar DSP-equipped speaker system, but my impression
is that these are fundamentally less effective than an IF-based
blanker (which your rig already has).

--
Dave Platt AE6EO
Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!

Thanks to all who responded.

I found the source - an electric blanket in my neighbor's house! I
took my portable shortwave and found the LOUD 1 second pulsing rather
quuickly. It's the cheap switching power supply that's the problem.
Now I just need to convince them to get another brand (I believe it's
made by Perfect Fit - they already have complaints filed with the FCC)

Jeff

On Wed, 29 Dec 2004 14:23:30 -0600, wrote:

In article ,
Jeff L wrote:

Thanks for the suggestions Dave. I've never met this neighbor yet, but
I do plan to. Kind of a bummer it has to be over a problem!

Your electric fence comments are interesting. It's a very regular,
rhythmic pulse every second or so.


Forget the DSP based outboard boxes, a waste of money. What does work
is a Timewave ANC-4 or MFJ-1026, I have the ANC-4 for getting rid of a
neighbors dimmer light from S-9 + to zero. They both use the same
method, phase cancellation before the noise gets in the radio. The
drawback is that these types of devices will only work on one noise, so
if you have say a power line noise and a dimmer light noise you'll have
to decide which is worse. Good luck.

Thanks to all who responded.

I found the source - an electric blanket in my neighbor's house! I
took my portable shortwave and found the LOUD 1 second pulsing rather
quuickly. It's the cheap switching power supply that's the problem.
Now I just need to convince them to get another brand (I believe it's
made by Perfect Fit - they already have complaints filed with the FCC)

Jeff

On Wed, 29 Dec 2004 14:23:30 -0600, wrote:

In article ,
Jeff L wrote:

Thanks for the suggestions Dave. I've never met this neighbor yet, but
I do plan to. Kind of a bummer it has to be over a problem!

Your electric fence comments are interesting. It's a very regular,
rhythmic pulse every second or so.


Forget the DSP based outboard boxes, a waste of money. What does work
is a Timewave ANC-4 or MFJ-1026, I have the ANC-4 for getting rid of a
neighbors dimmer light from S-9 + to zero. They both use the same
method, phase cancellation before the noise gets in the radio. The
drawback is that these types of devices will only work on one noise, so
if you have say a power line noise and a dimmer light noise you'll have
to decide which is worse. Good luck.

Tell you what, Jeff - if you want to make a friend for life, go buy the guy
a nice new electric blanket and swap him. You'll both be happy, and you'll
be getting off cheap.

When I went looking for a similar one-second pulse a couple of years ago, I
traced it to a neighbor's electric livestock fence. I had never met that
guy either, so volunteered to "fix" his fence myself at no cost to him. He
cheerfully agreed. To make a long story short, I found 56 corroded, poorly
done splices in the fence and it took me two days to fix them all!

K8AC

"Jeff L" wrote in message
...
Thanks to all who responded.

I found the source - an electric blanket in my neighbor's house! I
took my portable shortwave and found the LOUD 1 second pulsing rather
quuickly. It's the cheap switching power supply that's the problem.
Now I just need to convince them to get another brand (I believe it's
made by Perfect Fit - they already have complaints filed with the FCC)

Jeff

Tell you what, Jeff - if you want to make a friend for life, go buy the guy
a nice new electric blanket and swap him. You'll both be happy, and you'll
be getting off cheap.

When I went looking for a similar one-second pulse a couple of years ago, I
traced it to a neighbor's electric livestock fence. I had never met that
guy either, so volunteered to "fix" his fence myself at no cost to him. He
cheerfully agreed. To make a long story short, I found 56 corroded, poorly
done splices in the fence and it took me two days to fix them all!

K8AC

"Jeff L" wrote in message
...
Thanks to all who responded.

I found the source - an electric blanket in my neighbor's house! I
took my portable shortwave and found the LOUD 1 second pulsing rather
quuickly. It's the cheap switching power supply that's the problem.
Now I just need to convince them to get another brand (I believe it's
made by Perfect Fit - they already have complaints filed with the FCC)

Jeff