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Old August 24th 03, 03:38 PM
Ken Bessler
 
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Default Coaxial coil=choke=problem?

At my dipole's feedpoint I have a coil of rg8 mini coax
wrapped 6 turns in a 2-5/8" dia circle. I found a program
for calculating coaxial traps for dipoles and here are the
numbers it gave me:

Form diameter 2.375"
Coax diameter 0.242"
Capacitance/ft 25.20pf
Turns 6.000
Coil length 1.45"
Coax length 50.30"
End sensitivity 99.130 khz/inch
Turn sensitivity 257.94 khz/inch
Length/Diameter 0.550
Inductance (L) 2.342 uH
Capacitance (C) 105.620 pF
Reactance (X) 148.90 ohms


The program says this coil is resonant (?) at 10.120 mhz

Now here comes the really dumb question - will this cause
a problem on 30 meters? I seem to hear OK but I've not
yet tried to make any contacts...

My SWR meter indicates a 3:1 SWR there but my nifty
Z11 autotuner tunes it just fine.......

What am I not understanding here?

Ken KG0WX


 
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