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Old March 19th 05, 08:45 PM
RST Engineering
 
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Default 160 meter mobile -- Reality Check

My bag is VHF, so forgive me if I've bumbled up the calculations. My
numbers show that a standard 108" whip has an input impedance of somewhere
around 0.04 ohms in series with a 22 pf capacitor.

These numbers are so far from what I normally deal with that I'm not sure
that I'm right, and I'd appreciate somebody who actually works down in this
area giving my numbers a reality check.

If they ARE right, how in heaven do most people match to 0.04 ohms? The 22
pf I can resonate out with a 1 millihenry choke (or thereabouts), but how do
most people match 50 ohms to fractional ohms in the homebrew arena -- that
is, without just going out and buying a "magical matching box" of some sort?

Jim


 
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