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160/80/40 meter band trapped dipole

I use the following dimensions, 40m Trap 63/16 - 80m Trap 140/42 Millimeters before/after heat treatment
post 10 Oct 2020

Coils Traps Antennas Links


Coaxial Traps Grid-dip meter method
A trap is a parallel resonant circuit network that can perform either of two functions in an antenna system, depending on whether the traps are resonant at the operating frequency

Coil Design
The coil design is one of the most difficult and important parts of the coilgun

Cool It
I have owned an AT-AUTO since they were first released and its given good service. One area that it let me down was 10M

Current Through a 75m Bugcatcher Loading Coil
Many experiments and measurements have been made on loading coils using net standing wave current

Coil Designer