[Lowfer] Loading coil fight

Bill Ashlock [email protected]
Wed, 12 Feb 2003 16:42:54 -0500


John A,

>Maybe not all that significant. Say that he has 20 ohms in ground loss 
> >(the radiation resistance might be 0.03 ohms).  The #14 coil might >have 
>a realistic RF resistance of 5 ohms, and the #22 coil would be 12 >ohms.

>For the usual 1 watt, that gives a base current of 0.2 A for the #14 >coil, 
>and 0.176 A for the #22 coil. That's 1 dB of field strength >difference.

I would think that the two AC resistances for typical Lowfer loading coils 
would be more like 12 ohms and x 2.5 = 30 ohms. On your 20 ohm ground loss 
system the additional 18 ohms would represent a 50/32 additional loss 
resistance factor or 2db. Well, not exactly a huge loss but just enough to 
eat away at me to the point where I no longer could sleep at night!!!!! <G>

Bill



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