[Premium-Rx] STEERABLE LOW NOISE RECEPTION

[Pat1McA at aol.com]

Hello to all,
 
My receivers here are fed from a large (10mx6m)  homebrew electrically 
steerable crossed loop array utilising a goniometer  arrangement.
 
There appears to be very little information on the Web concerning  anything 
relating to tuned and aperiodic goniometers and I wondered if anyone  else 
uses this method for unilateral low noise reception?
 
Up to now my only source of information has been, the excellent  book, 
Keen's Wireless Direction Finding, 3rd Edition, 1944.
 
In relation to the above does anyone know a source of PL259 lookalike plugs 
 with two centre pins, one larger than the other and the special double 
centre  screened coax to go with them?
 
Please contact off list - many thanks!
 
Pat G3YFK