I have build a ultra simple multiband endfed antenna. It weight 58 Gram only.
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parts list:
1x FT50-43 ferrite toroid
1x 100pF 1000V capazitor
1x 50cm of 0.25mm enameled copper wire
1x SMA female device connector
1x PVC pipe diameter 28.5mm length 60mm
1x 12m 0.14mm2 insulated wire
Other Material:
-hot glue or epoxy
-solder iron
-tape
-some shrink tubing