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So does the shunt coil work across 10m to 80m bands? I'm curious as to how the shorting screws work in the original design. I will say that I am learning alot from this thread and all who have contributed so far.

You are correct. The screws were not fully tightened. If they were, they would result in a complete short. The more I delve into this the more I learn and the more questions arise. The three lower screws appear to ground the matching coil. Shouldn't the body of the antenna be isolated frm the...

Top coil has about 150 turns with a 59" whip.

The top coil has approximately 150 turns. Here are pictures of the base with a steel rod and the threaded mounting bolt. There appears to be an insulation spacer between the outer wall and the inner tube that the steel rod slides into. What I don't understand is why there would be continuity...

Fourstringburn - My thoughts were that it was home brew but was hoping that by some chance that it was manufactured with some documentation available. The motor works fine. I took the antenna apart and cleaned the windings with a electronics contact cleaner and lube. I installed a new...

I was recently given a screwdriver antenna by a non ham. Can anyone give me an idea as to what brand or model screwdriver this is? Also, can you explain what is missing from its base? I'm assuming that it is the matching coil and tap points but am to new to the hobby don't completely understand...