Topband: The band sans noise

[Andrew Ikin]

Mike Waters wrote on April 22.

snip<
1. What does the Pixel Loop do better than these and other loops?
2. What does the Pixel Loop's preamp do to improve the S/N ratio???
3. And what IS its RDF?>

The Pixel loop is balanced, so it will reject locally radiated E-Field noise 
providing this noise is within the near -field of the loop. This feature is 
not available with Vertical and terminated loop antennas. Plus the 20dB 
nulls previously mentioned. Also balanced loops afford very high rejection 
of conducted power-line noise.

The Pixel loop pre-amp. doesn't improve the S/N ratio except that the IMD 
noise floor will be much lower compared to single ended amps. Generally 
speaking the amp. noise of the Pixel loop is on the high side compared to 
Wellbrook Loops.
The RDF is about 5dB.

End -fire phasing will improve the RDF whilst still providing rejection of 
near E-Field noise.  However, one requires very low noise loops or larger 
loops to maintain a good S/N to compensate for phasing signal loss.

73

Andrew Ikin

G8LUG