Topband: Topband Digest, Vol 45, Issue 17

[Herb Schoenbohm]

>My question is with respect to loading it on 80. In Chicago, it 
>was far enough from an ideal full wave that my tuner handled it 
>just fine, but here in Santa Cruz where it's almost a perfect half 
>wave (with the loading coils), the Z is far too high. What's the 
>best way to load it on 80?  It's only about 25 ft from the shack, 
>so a ladder line stub as a transformer is not very practical. 
>
>73,
>
>Jim K9YC
>
>Suggest a resonant circuit with a 50 ohm feed line tapped up a few turns from the grounded side.  Since this is outside a small WX proofed plastic box of the appropriate size may be needed.  Also you might consider, depending on you ultimate power levels, determining the required C needed with the coil with a low power capacitor and then switching in a good Mica HV cap such as a G2.  This antenna you describe should be a real performer on 80 meters.
>
73,

Herb Schoenobhm, KV4FZ


>  
>
>
>  
>