I use an Timewave ANC-4 to reduce noise on the low bands at my location.
On 40 & 160 meters I can reduce the noise almost to S1, but on 75 meters I
can only reduce it to S4-5.
I use a noise sense antenna which is a dipole 4ft on each side about 4
inches off the ground and parallel to the power and telephone lines.
Anyone have one of these units and having any ideas I might try to reduce 75
meters to a lower S-meter reading?

All my low band antennas are verticals.

Stan
AH6JR

Sun Tzu wrote in
news:_rCdndMY26mGEqLYnZ2dnUVZ_oOdnZ2d@hawaiiantel. net:

I use an Timewave ANC-4 to reduce noise on the low bands at my
location. On 40 & 160 meters I can reduce the noise almost to S1, but
on 75 meters I can only reduce it to S4-5.
I use a noise sense antenna which is a dipole 4ft on each side about 4
inches off the ground and parallel to the power and telephone lines.
Anyone have one of these units and having any ideas I might try to
reduce 75 meters to a lower S-meter reading?

All my low band antennas are verticals.

You might try using a vertical whip for the ANC-4. I use the built-in one
on my MFJ-1026. Even so, you may just be experiencing general ionospheric
noise at that level if your antenna is fairly good.

Is your QTH urban or rural? Here in urban downtown Chilliwack, BC, I get a
lot of noise sources and, of course, the 1026 can really only take out the
loudest single source.


--
Dave Oldridge+
ICQ 1800667

Mine seems to work fine with about 25 feet of wire simply run out the window and
about 4 inches above the ground along the foundation of the house.

[End fed random wire approach]

/s/ DD

Sun Tzu wrote:

I use an Timewave ANC-4 to reduce noise on the low bands at my location.
On 40 & 160 meters I can reduce the noise almost to S1, but on 75 meters I
can only reduce it to S4-5.
I use a noise sense antenna which is a dipole 4ft on each side about 4
inches off the ground and parallel to the power and telephone lines.
Anyone have one of these units and having any ideas I might try to reduce 75
meters to a lower S-meter reading?

All my low band antennas are verticals.

Stan
AH6JR

How did you manage to find this arrangement? trial & error? by accident?
I keep trying different things but maybe I am "thinking" too much, maybe its
simpler than what I am trying to do.

Dave wrote:

Mine seems to work fine with about 25 feet of wire simply run out the
window and about 4 inches above the ground along the foundation of the
house.

[End fed random wire approach]

/s/ DD

Sun Tzu wrote:

I use an Timewave ANC-4 to reduce noise on the low bands at my location.
On 40 & 160 meters I can reduce the noise almost to S1, but on 75 meters
I can only reduce it to S4-5.
I use a noise sense antenna which is a dipole 4ft on each side about 4
inches off the ground and parallel to the power and telephone lines.
Anyone have one of these units and having any ideas I might try to reduce
75 meters to a lower S-meter reading?

All my low band antennas are verticals.

Stan
AH6JR

Dave Oldridge wrote:

Sun Tzu wrote in
news:_rCdndMY26mGEqLYnZ2dnUVZ_oOdnZ2d@hawaiiantel. net:

I use an Timewave ANC-4 to reduce noise on the low bands at my
location. On 40 & 160 meters I can reduce the noise almost to S1, but
on 75 meters I can only reduce it to S4-5.
I use a noise sense antenna which is a dipole 4ft on each side about 4
inches off the ground and parallel to the power and telephone lines.
Anyone have one of these units and having any ideas I might try to
reduce 75 meters to a lower S-meter reading?

All my low band antennas are verticals.

You might try using a vertical whip for the ANC-4. I use the built-in one
on my MFJ-1026. Even so, you may just be experiencing general ionospheric
noise at that level if your antenna is fairly good.

Is your QTH urban or rural? Here in urban downtown Chilliwack, BC, I get
a lot of noise sources and, of course, the 1026 can really only take out
the loudest single source.




I guess its residential on 1/3 of an acre lots. Not real tight.
But the utilities are above ground and that probably doesnt help.

I simply didn't want to deal with any 'VSWR' issues from a dipole configuration.
So, a simple end fed wire meets my needs.

Sun Tzu wrote:

How did you manage to find this arrangement? trial & error? by accident?
I keep trying different things but maybe I am "thinking" too much, maybe its
simpler than what I am trying to do.

Dave wrote:


Mine seems to work fine with about 25 feet of wire simply run out the
window and about 4 inches above the ground along the foundation of the
house.

[End fed random wire approach]

/s/ DD

Sun Tzu wrote:


I use an Timewave ANC-4 to reduce noise on the low bands at my location.
On 40 & 160 meters I can reduce the noise almost to S1, but on 75 meters
I can only reduce it to S4-5.
I use a noise sense antenna which is a dipole 4ft on each side about 4
inches off the ground and parallel to the power and telephone lines.
Anyone have one of these units and having any ideas I might try to reduce
75 meters to a lower S-meter reading?

All my low band antennas are verticals.

Stan
AH6JR

Reading the schematics it is possible that the ANC-4 does not
fully cover the 360 degrees phase shift, just like the MFJ-1025.
But it is also possible that you experience more than one noise
source on 75 mtrs. A noise canceller (with two inputs/antennas)
can cancel only one noise source.

I have written about noise cancelling on my site, e.g.:
http://www.pa0sim.nl/Phaser%2080%20-%2010%20meters.htm
May be it can help.

73 es gl de Jan PA0SIM


"Dave Oldridge" schreef in bericht
9...
Sun Tzu wrote in
news:_rCdndMY26mGEqLYnZ2dnUVZ_oOdnZ2d@hawaiiantel. net:

I use an Timewave ANC-4 to reduce noise on the low bands at my
location. On 40 & 160 meters I can reduce the noise almost to S1, but
on 75 meters I can only reduce it to S4-5.
I use a noise sense antenna which is a dipole 4ft on each side about 4
inches off the ground and parallel to the power and telephone lines.
Anyone have one of these units and having any ideas I might try to
reduce 75 meters to a lower S-meter reading?

All my low band antennas are verticals.

You might try using a vertical whip for the ANC-4. I use the built-in one
on my MFJ-1026. Even so, you may just be experiencing general ionospheric
noise at that level if your antenna is fairly good.

Is your QTH urban or rural? Here in urban downtown Chilliwack, BC, I get
a
lot of noise sources and, of course, the 1026 can really only take out the
loudest single source.


--
Dave Oldridge+
ICQ 1800667

In article ,
Sun Tzu wrote:

Dave Oldridge wrote:

Sun Tzu wrote in
news:_rCdndMY26mGEqLYnZ2dnUVZ_oOdnZ2d@hawaiiantel. net:

I use an Timewave ANC-4 to reduce noise on the low bands at my
location. On 40 & 160 meters I can reduce the noise almost to S1, but
on 75 meters I can only reduce it to S4-5.
I use a noise sense antenna which is a dipole 4ft on each side about 4
inches off the ground and parallel to the power and telephone lines.
Anyone have one of these units and having any ideas I might try to
reduce 75 meters to a lower S-meter reading?

All my low band antennas are verticals.

You might try using a vertical whip for the ANC-4. I use the built-in one
on my MFJ-1026. Even so, you may just be experiencing general ionospheric
noise at that level if your antenna is fairly good.

Is your QTH urban or rural? Here in urban downtown Chilliwack, BC, I get
a lot of noise sources and, of course, the 1026 can really only take out
the loudest single source.




I guess its residential on 1/3 of an acre lots. Not real tight.
But the utilities are above ground and that probably doesnt help.

not sure if anyone realizes this but i've noticed that the adj controls
can sometimes be very very sensitive sometimes i've found that a hair
kills the noise and if you blinked at that moment you missed it

dunno maybe it's just me

Jan Simons PA0SIM wrote:

Reading the schematics it is possible that the ANC-4 does not
fully cover the 360 degrees phase shift, just like the MFJ-1025.
But it is also possible that you experience more than one noise
source on 75 mtrs. A noise canceller (with two inputs/antennas)
can cancel only one noise source.

I have written about noise cancelling on my site, e.g.:
http://www.pa0sim.nl/Phaser%2080%20-%2010%20meters.htm
May be it can help.

73 es gl de Jan PA0SIM


Nice website, have you considered modifying the existing units (MFJ & ANC)
to do what you have shown? Your idea would make either of these 2 units much
better.

By the way, I took the sense antenna which is a short dipole and I made one
leg vertical and the other horizontal. Now I have almost no noise on 75
meters. I haqve been playing around with this for awhile and it was either
all vertical or all horizontal. Now with this configuration the weak
signals can be heard.


Stan
AH6JR




"Dave Oldridge" schreef in bericht
9...
Sun Tzu wrote in
news:_rCdndMY26mGEqLYnZ2dnUVZ_oOdnZ2d@hawaiiantel. net:

I use an Timewave ANC-4 to reduce noise on the low bands at my
location. On 40 & 160 meters I can reduce the noise almost to S1, but
on 75 meters I can only reduce it to S4-5.
I use a noise sense antenna which is a dipole 4ft on each side about 4
inches off the ground and parallel to the power and telephone lines.
Anyone have one of these units and having any ideas I might try to
reduce 75 meters to a lower S-meter reading?

All my low band antennas are verticals.

You might try using a vertical whip for the ANC-4. I use the built-in
one
on my MFJ-1026. Even so, you may just be experiencing general
ionospheric noise at that level if your antenna is fairly good.

Is your QTH urban or rural? Here in urban downtown Chilliwack, BC, I get
a
lot of noise sources and, of course, the 1026 can really only take out
the loudest single source.


--
Dave Oldridge+
ICQ 1800667

ml wrote:

In article ,
Sun Tzu wrote:

Dave Oldridge wrote:

Sun Tzu wrote in
news:_rCdndMY26mGEqLYnZ2dnUVZ_oOdnZ2d@hawaiiantel. net:

I use an Timewave ANC-4 to reduce noise on the low bands at my
location. On 40 & 160 meters I can reduce the noise almost to S1, but
on 75 meters I can only reduce it to S4-5.
I use a noise sense antenna which is a dipole 4ft on each side about 4
inches off the ground and parallel to the power and telephone lines.
Anyone have one of these units and having any ideas I might try to
reduce 75 meters to a lower S-meter reading?

All my low band antennas are verticals.

You might try using a vertical whip for the ANC-4. I use the built-in
one
on my MFJ-1026. Even so, you may just be experiencing general
ionospheric noise at that level if your antenna is fairly good.

Is your QTH urban or rural? Here in urban downtown Chilliwack, BC, I
get a lot of noise sources and, of course, the 1026 can really only
take out the loudest single source.




I guess its residential on 1/3 of an acre lots. Not real tight.
But the utilities are above ground and that probably doesnt help.

not sure if anyone realizes this but i've noticed that the adj controls
can sometimes be very very sensitive sometimes i've found that a hair
kills the noise and if you blinked at that moment you missed it

dunno maybe it's just me

maybe you have a bad or dirty control? OR as Jan wrote previously the
variable resistor is not linear and the abrupt change you see it due to the
variable resistor.