Re: Noise cancelling for G8 etc


Many DXers are using the "Quantum Phaser" sold by RadioPlus. See "" for more information.

Alternately there are several homebrew designs from the simple to the complex available on my tech page "" and Dallas Lankford's page "".

If the antennas used have the same pick-up pattern, they should be placed at least 100 ft. / 30 m apart, otherwise you null everything together - noise/pests and desired DX as well. If the antennas have different pick-up patterns: loop versus vertical, or two loops at a right angle, they can be located closer together, maybe about 10 ft. / 3 m apart, and still allow nulling of one pest station or noise signal without appreciably weakening stations you want to hear.

Mark Connelly, WA1ION
Billerica, MA + South Yarmouth, MA, USA

--- In ultralightdx@..., "bty49514" <michael.setaazul@...> wrote:

For now, I am inductively coupling my G8 to a longer ferrite aerial
with MW and LW coils and separate tuning capacitors. I may later
experiment with direct connection to the PCB and/or a 5-turn coupling
link on the internal ferrite.

Does anyone have designs for phase-cancelling of digital and transient noise (computers, domestic equipment, power-lines etc.)? I wonder if TWO external ferrite aerials (equal length, one long one short or one and a pick-up wire aerial) might be used so that interference can be phased-cancelled. Any circuit ideas would be valuable as a starting point.


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