[Lowfer] 17.8 kHz TACAMO

[JD]

Even 200 feet of the skinniest coax will scarcely exhibit a couple dB loss 
below 500 kHz; coax is not the real problem below the BC band.  It's the 
impedance of the antenna not being anywhere near the input impedance of the 
radio, let alone the transmission line.  If you can tune or (better yet, 
IMO) buffer the antenna to something closer to 50 ohms at LF before the 
signal goes into the cable, you'll get much better results.

This is, after all, the secret to getting anything out of small active whips 
(I refuse to use the misnomer "e-probe").  They pick up far, far less of the 
available signal than a more typical size antenna, but because they 
transform the impedance to 50 ohms or thereabouts, they deliver more of what 
they capture to the receiver than an inherently mismatched bigger antenna 
can do by itself.

John