Ham Radio World - Antenna Trap Calculator Link: http://vwlowen.co.uk/java/ trap.htm | Facebook
Making trap vertical antennas
The Coax trap program computes design parameters for the construction of coaxial traps for HF usage. Typically these are constructed from PVC tube and RG58/59 coax
Ham Radio 20 / 40 Meter Short Coax Trap Dipole Antenna | The Wonderful World of Microcontroller!
Antenna Trap Calculator - Resource Detail - The DXZone.com