On Sunday, November 17, 2013 4:26:53 PM UTC-6, Channel Jumper wrote:
Why not just raise the antenna higher?

What good will that do if the noise received is a decoupling/
common mode issue?



Most ambient noise is vertically polarized.

Doesn't really matter much. He's picking it up on the outer
shield of his coax.




This is the reason why television is horizontally polarized.

So? We are not really talking about noise that is received
from the antenna itself. We are talking more about house noise
that is picked up on the outer shield of the coax, which then
pipes it right back to the receiver on the inner side of the
shield. You can have this problem with any antenna, horizontal
or vertically polarized. It is due to poor decoupling.




Use a poly phaser and ground to dc.

Huh? When did lightning protection become an issue?
Besides moving the antenna, there is little one can do to
negate noise that is actually picked up by the antenna itself.

The main reason I even talk of all this is to refute the claim
that the folded driven elements receive less noise than a
regular dipole driven element. It's not the type of element.
It's the decoupling differences between the antennas, and it
was pretty much verified when he added beads to the feed line,
and the noise was reduced.

Noise is RF same as any other signal. It follows all the same
rules. If an antenna element actually received less noise than
another, it would receive less intentional RF also.
But I'd be willing to bet he notices no lack of performance
for it's number of elements and boom length when listening to
other hams.

On Monday, November 18, 2013 12:44:51 AM UTC-6, wrote:

But I'd be willing to bet he notices no lack of performance

for it's number of elements and boom length when listening to

other hams.

One other note though... If he is showing signs of a decoupling
problem when receiving, that means conditions are ripe for mayhem
when transmitting. He may well have skewing of his pattern.
It can skew upwards off the horizon, and you will see less gain
at the lower angles you want, and it could probably skew the
pattern as far as the heading in some cases.
So improving the decoupling will help greatly both transmitting
and receiving.
With the old Ringo Ranger verticals, the difference between
the original antenna with no decoupling, and the Ringo Ranger 2,
which had a lower decoupling section, was several S units when
tested on local signals at my QTH. Of course, the amount of
skewing can be all over the map depending on the length of the
un-decoupled feed line.
The difference in performance is reciprocal between transmit
and receive. IE: if I saw 3 db less signal on a particular
station with no decoupling vs decoupled, they would see the same
3 db less signal from me on their receiver.

I don't think he gets it - if there is noise in his neighborhood - why blame it on the antenna?

The purpose of the YAGI antenna is to improve in one direction while causing rejection in another direction.

If noise is your problem - MOVE!

No one said you had to put up a antenna there.

I had power line noise, actually BBOP, which I solved after some discussion with the electric company, followed by a complaint to the PUC, followed by a complaint to the FCC.

In the end, it cost me $500.00 - because the electric company made me replace my service entrance - bad cable jacket.

The bottom line is - if you are intelligent enough to find the source of the noise and can eliminate that source, you shouldn't have noise anymore.

Most vertical antenna's are to DC ground.

Because they do not provide any rejection, they cannot physically have any gain. Although they might have characteristics like a antenna that does have gain.

I have proven a dozen times that I will talk just as far with a simple vertical antenna as many people will with a beam antenna. It is more about the location of the antenna then it is of the actual power level or the amount of gain of the antenna. I just happen to be in a better situation then most people when it comes to antenna's and two way communications.

On Monday, November 18, 2013 9:55:55 PM UTC-6, Channel Jumper wrote:
I don't think he gets it - if there is noise in his neighborhood - why

blame it on the antenna?

I don't think you get it. As usual.. :/

His tests with the beads on the feed line indicate that the
noise is not from his neighborhood. It's from his own house.

The rest of your unrelated and largely incorrect writings,
I will have printed out, so I can feed it to the possum that
prowls my backyard at night.

I imagine it won't crap right for a week.. :+
I hope they don't call PETA on me.. :|