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The art of noise nulling

Dave, NR1DX: In my experience folks who have had problems getting the cancellers to work have not put enough thought into getting a good antenna for the noise antenna.
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The art of nulling
Mark Connelly: Report on some "tricks of the trade" in the art of nulling unwanted stations and noise.
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Praise for the Quantum Phaser

Several: Of the three commercially available Phasers (Quantum, ANC-4, MFJ) the Quantum Phaser is by far the easiest to operate and to to get a null. -- Read more --

Polarization of man-made noise
Local noise are mostly vertically polarized, while radio signals normally are horizontally polarized. Still, you never know what will work, because you never really know what is going on. Sometimes verticals are better, sometimes horizontals.
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How to fix electric fence noise

Walter Dufrain: Electric fence noise is "fixable", but you have to check every wire on the fence. -- Read more --


Wind your own transformer
George Dowell, K0FF: By using larger cores, you need to wind fewer turns. -- Read more --

Which transformer is best?
Discussion: Which matching transformers are best suited for Flag and Pennant antennas. -- Read more --

Select your core material

Gary Breed, K9AY: The 43 material is commonly used in EMI filtering applications, where looser manufacturing tolerances may be acceptable. This can affect antenna matching transformers. -- Read more --

How to balance your antenna

Tom Rauch, W8JI: Discussing the need, or not, for shielding metal boxes, and how to balance different antennas as Beverage, small loops, Flag and Pennant. -- Read more --


Tune your antenna for better DX
The construction of a long-wire antenna is simple. By adding an easy to build Pi coupler you will get even more signals from your wires. -- Read more --
And a simple shortwave tuner

Antenna Selector
A simply circuit makes it easy for you to switch between one or two antennas, or using all at the same time.
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Antenna splitter
Tom Rauch: A "magic T" splitter or combiner is very easy to build. -- Read more --

Broadband amplifier
Mark Connelly: The BBVA-A broadband amplifier is a good choice for low-noise amplification in the 150 to 6500 kHz frequency range. -- Read more --

CATV connectors
George Dowell: CATV coax is often free for the taking. Not so the connectors. Here is a way to make weatherproof splices and connectors at little cost. -- Read more --

"Preamps are useless"
Bill Smith: A preamp is of no value. It increases both the signal and the noise by equal amounts. There is no improvement in signal to noise performance. -- Read more --


American Wire Gauge
Convert American wire measures to metrics.
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Sources for parts
Where to find those parts your need for your antenna project. -- Read more --

Great Circle maps
These four sites all have versions of Great Circle map generating software which may be centered upon your location. -- Read more --

GDO manual
How to use a Grid Dip Meter, a BAMA manual is available at this web site in PDF format (note: 7.2 megabytes).
or (loading very slowly).
Harry Lythall is also offering some interesting info on GDO use.

Alternative to coax feed line
With double pane, aluminum windows it is hard to feed an outdoor antenna with a coax cable. So here's one solution.
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Konsten att bäst skarva en koax
[Text in Swedish] Hur man bäst skarvar en koaxialkabel som gått av. -- Read more --

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