[Elecraft] Low-noise receiving antennas/antennae

[Vic Rosenthal]

Following the recent discussion of this subject, I came across

http://www.wellbrook.uk.com/

a manufacturer of broadband (150 KHz-30 MHz and 3-30 MHz models) active magnetic
loop antennas for receiving only.  They claim a significant reduction in manmade
noise pickup due to the directionality of the rotatable small loop (1 m
diameter), and the fact that the loop responds to the magnetic and not electric
field.  Whether this latter claim makes sense, I don't know!

Has anyone had any experience with these antennas?  

Vic K2VCO