[R-390] Line Noise and Balanced Antennas

[JMILLER1706 at cfl.rr.com]

Ever since the Florida power company routed a high voltage live through 
my neighborhood, I have been plagued by S-9 impulse noise in the 3-7 
Mhz range, except on rainy days.  I have sent a problem report to the 
company, we'll see what they do.  The noise blanker on my "modern" 
transceiver takes most of it out, but the 390a ears it all too well.  I 
have heard that a balanced antenna using both sides of the balanced 
input, with dual center conductor coax, may help with noise sources.  
Would this help with line noise, and what are the design dimensions?
Jim N4BE