Yuri Blanarovich wrote:
Simple rule for (non resonant) radials in or on the ground:
1. Mo' - da better
2. Longer the better.
3. Better to use (insulated) wire on the surface than buried. Just stretch
it out and let the grass grow over.
4. Water before contest or major DX hunting.
5. Forget the above and set it up on the salty beach.

All good advice. Well, except for #5. Can't afford beachfront property!
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73,
HZ