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Old February 1st 04, 05:31 PM
Ronald Walters
 
Posts: n/a
Default Noise - MFJ-1265?

Background: Within the past several months my QTH which was virtually a
very low noise environment now is one of the nosiest QTH's I have ever lived
in. Birdies every 17 kc across 160-80 and 40. Some nights its worse with
birdies every 5-7-kc. These are not low signal strengths either but up to a
S-9+ on 80 meters.
have check with all of my neighbors since initially it would start right at
5 PM and last all night until 7:30 in the morning. My first thought was an
auto light fixture. Well it's gotten bad and doesn't seem to be on a
regular time schedule. Feelings are TV or touch lamp. Possible PC but
don't know. Power company is Florida Progress which is a Duke Energy
company. Have heard that Duke is playing with their new Internet access
over power lines but I do not think it has hit the central Florida market.

Question - I am thinking about trying the MFJ-1265 Noise phasing unit. Have
read an old review on ARRL and other comments on some bulletin boards but am
wondering if anyone out there has experience with the unit and what their
honest impression is. In addition to that unit I plan on a complete rework
of the antenna and grounding system her just to make sure I do not have a
poor joint in the system that is providing some rectification and being self
induced. Any comments will be appreciated.

Again thanks to the list for accepting this inquiry, I respect the expertise
of the this group.

Ron - W4LDE


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Old February 1st 04, 07:04 PM
Mikey
 
Posts: n/a
Default

Ron, before you go nuts with fixes & mods, do a little noise-sniffing. Take
a 2M H/T, and a portable AM radio out around the neighborhood, and see if
you can find any potential sources for the noise.

Bear in mind too, that the noise doesn't have to be locally produced. It is
theoretically possible (and has happened more than once) for the noise
source to actually be several miles away, but part of the same grid. One of
our local hams had a problem several years ago, and the source was a touch
lamp, 1.5 miles away...

And don't be afraid to ask Duke to help you in searching out the noise
source - if it's theirs, they are obliged to find & fix it.

73,
Mike KI6PR
El Rancho R.F., CA

"Ronald Walters" wrote
Background: Within the past several months my QTH which was virtually a
very low noise environment now is one of the nosiest QTH's I have ever

lived
in. Birdies every 17 kc across 160-80 and 40. Some nights its worse with
birdies every 5-7-kc. These are not low signal strengths either but up to

a
S-9+ on 80 meters.
have check with all of my neighbors since initially it would start right

at
5 PM and last all night until 7:30 in the morning. My first thought was

an
auto light fixture. Well it's gotten bad and doesn't seem to be on a
regular time schedule. Feelings are TV or touch lamp. Possible PC but
don't know. Power company is Florida Progress which is a Duke Energy
company. Have heard that Duke is playing with their new Internet access
over power lines but I do not think it has hit the central Florida market.

Question - I am thinking about trying the MFJ-1265 Noise phasing unit.

Have
read an old review on ARRL and other comments on some bulletin boards but

am
wondering if anyone out there has experience with the unit and what their
honest impression is. In addition to that unit I plan on a complete

rework
of the antenna and grounding system her just to make sure I do not have a
poor joint in the system that is providing some rectification and being

self
induced. Any comments will be appreciated.

Again thanks to the list for accepting this inquiry, I respect the

expertise
of the this group.

Ron - W4LDE




  #3   Report Post  
Old February 1st 04, 07:32 PM
W4JLE
 
Posts: n/a
Default

Before spending money on a phasing unit, run a few of the following checks.

1. Remove antenna - check for birdies. If they are still there start looking
at the receiver.

2. If no birdies, assuming rig can run on 12 Volts, remove power supply and
substitute a battery. Reconnect antenna. Check for birdies.

3. If birdies, throw house master breaker and see if they go away. If they
do as I suspect they will turn breaker back on and turn off breakers one at
a time untill you find out it is a clock radio or some other electronic
device.

4. If they still persist, start driving around the neighborhood looking for
increased signal strength.

Had a similar problem one time, turned out to be an old radio in the attic.
My wife had been up there sorting boxes and plugged in an old radio to
listen to. She had turned it down, but not off and it was creating havoc.

You did not mention the rig your using , that would be helpful.

"Ronald Walters" wrote in message
. com...
Background: Within the past several months my QTH which was virtually a
very low noise environment now is one of the nosiest QTH's I have ever

lived
in. Birdies every 17 kc across 160-80 and 40. Some nights its worse with
birdies every 5-7-kc. These are not low signal strengths either but up to

a
S-9+ on 80 meters.
have check with all of my neighbors since initially it would start right

at
5 PM and last all night until 7:30 in the morning. My first thought was

an
auto light fixture. Well it's gotten bad and doesn't seem to be on a
regular time schedule. Feelings are TV or touch lamp. Possible PC but
don't know. Power company is Florida Progress which is a Duke Energy
company. Have heard that Duke is playing with their new Internet access
over power lines but I do not think it has hit the central Florida market.

Question - I am thinking about trying the MFJ-1265 Noise phasing unit.

Have
read an old review on ARRL and other comments on some bulletin boards but

am
wondering if anyone out there has experience with the unit and what their
honest impression is. In addition to that unit I plan on a complete

rework
of the antenna and grounding system her just to make sure I do not have a
poor joint in the system that is providing some rectification and being

self
induced. Any comments will be appreciated.

Again thanks to the list for accepting this inquiry, I respect the

expertise
of the this group.

Ron - W4LDE




  #4   Report Post  
Old February 2nd 04, 05:56 PM
Steve Nosko
 
Posts: n/a
Default

Some very good suggestions. I will add that birdies at this spacing can
also suggest things like switching power supplies. Many things have them
now. If A portable receiver to hear them can go a long way.


--
Steve N, K,9;d, c. i My email has no u's.
"W4JLE" w4jle(remove to wrote in message
...
Before spending money on a phasing unit, run a few of the following

checks.

1. Remove antenna - check for birdies. If they are still there start

looking
at the receiver.

2. If no birdies, assuming rig can run on 12 Volts, remove power supply

and
substitute a battery. Reconnect antenna. Check for birdies.

3. If birdies, throw house master breaker and see if they go away. If they
do as I suspect they will turn breaker back on and turn off breakers one

at
a time untill you find out it is a clock radio or some other electronic
device.

4. If they still persist, start driving around the neighborhood looking

for
increased signal strength.

Had a similar problem one time, turned out to be an old radio in the

attic.
My wife had been up there sorting boxes and plugged in an old radio to
listen to. She had turned it down, but not off and it was creating havoc.

You did not mention the rig your using , that would be helpful.

"Ronald Walters" wrote in message
. com...
Background: Within the past several months my QTH which was virtually a
very low noise environment now is one of the nosiest QTH's I have ever

lived
in. Birdies every 17 kc across 160-80 and 40. Some nights its worse

with
birdies every 5-7-kc. These are not low signal strengths either but up

to
a
S-9+ on 80 meters.
have check with all of my neighbors since initially it would start right

at
5 PM and last all night until 7:30 in the morning. My first thought was

an
auto light fixture. Well it's gotten bad and doesn't seem to be on a
regular time schedule. Feelings are TV or touch lamp. Possible PC but
don't know. Power company is Florida Progress which is a Duke Energy
company. Have heard that Duke is playing with their new Internet access
over power lines but I do not think it has hit the central Florida

market.

Question - I am thinking about trying the MFJ-1265 Noise phasing unit.

Have
read an old review on ARRL and other comments on some bulletin boards

but
am
wondering if anyone out there has experience with the unit and what

their
honest impression is. In addition to that unit I plan on a complete

rework
of the antenna and grounding system her just to make sure I do not have

a
poor joint in the system that is providing some rectification and being

self
induced. Any comments will be appreciated.

Again thanks to the list for accepting this inquiry, I respect the

expertise
of the this group.

Ron - W4LDE






  #5   Report Post  
Old February 2nd 04, 11:37 PM
Tarmo Tammaru
 
Posts: n/a
Default

Did anybody close by get a new plasma TV. 17 KHz is way to low for a
switching power supply, and slightly high for NTSC TV, but could be some
kind of ED TV or computer monitor.

Tam/WB2TT
"




  #6   Report Post  
Old February 3rd 04, 05:13 PM
M.D.
 
Posts: n/a
Default


"Ronald Walters" wrote in message
. com...
Background: Within the past several months my QTH which was virtually a
very low noise environment now is one of the nosiest QTH's I have ever

lived
in. Birdies every 17 kc across 160-80 and 40. Some nights its worse with
birdies every 5-7-kc. These are not low signal strengths either but up to

a
S-9+ on 80 meters.
have check with all of my neighbors since initially it would start right

at
5 PM and last all night until 7:30 in the morning. My first thought was

an
auto light fixture. Well it's gotten bad and doesn't seem to be on a
regular time schedule. Feelings are TV or touch lamp. Possible PC but
don't know. Power company is Florida Progress which is a Duke Energy
company. Have heard that Duke is playing with their new Internet access
over power lines but I do not think it has hit the central Florida market.

Question - I am thinking about trying the MFJ-1265 Noise phasing unit.

Have
read an old review on ARRL and other comments on some bulletin boards but

am
wondering if anyone out there has experience with the unit and what their
honest impression is. In addition to that unit I plan on a complete

rework
of the antenna and grounding system her just to make sure I do not have a
poor joint in the system that is providing some rectification and being

self
induced. Any comments will be appreciated.

Again thanks to the list for accepting this inquiry, I respect the

expertise
of the this group.

Ron - W4LDE



Ron,

I have been experiencing almost the same problems. I run a TS850 and
loop/SGC239 combo on this end. I went through all the troubleshooting routes
to find the source of my noise. All my radio gear is on a 12V battery
system with charger so I know it is not coming through the AC lines. If I
remove the antenna the noise disappears. It ended up being a combination of
two sources, the highspeed cable modem hooked up to the computer upstairs in
the living room, and the switching supply in my living room TV. Unplugging
both devices completely eliminates all noise on the rig. I even went as far
as to line both the modem case and inside of the TV with aluminum tape.
Helped a little bit but the noise was still S9+ on 160 and 80. Even put an
AC line filter on the TV just in case. In desperation I tried the MFJ 1026
noise canceller. With a pickup antenna running on the basement ceiling
under the TV, I am able to null the noise from S9 to about S2 or S3. I am
hearing PSK signals on 20m I couldn't hear before. Not the ideal solution,
but it does allow me to enjoy HF again. I would try and borrow one first to
see if it will work in your situation.

Good luck,

Max


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