[R-390] Broadcast radio at 2 meg

[Gord Hayward]

We always have a similar problem on 160 for field day from a station at 
570 kHz.
To fix it we built a can (yes, a can at 570 kHz).  Its a helical 
resonator, 160 turns
of number 12 wire on a 12 inch sonotube (concrete form tube) in a 45 gal 
drum.
Believe it or not its 18 dB deep at 5780 with a 10 kHz bandwidth.  I do love
titanic engineering.

Cheers, Gord VE3EOS

-- 

Gordon L. Hayward, Ph.D., P.Eng.,
Associate Professor, Biological Engineering,
School of Engineering, University of Guelph,
Guelph, Ontaro, N1G 2W1.