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J-Pole Antenna Calculator
VHF band III 3/4λ coaxial J-pole - Radio/TV transmitter superstore
José Jesus (PS8ET) 🇧🇷🇺🇦 on X: "Antenna J-Pole 145/440 (Desing KN9B) First test on satelitte AO91 I spoke with: PT7MGS, PU1UDS, PY1LT, PS8BR, FY5HB and 9Z4DZ Excellent to carry in the backpack ...
Slim Jim and J Pole calculator – M0UKD – Amateur Radio Blog
Super J Pole Antenna Calculator - Design a Super J Pole Antenna For Any Band!