Last summer an attempt was made to homebrew a couple of 2m antennas, using parts salvaged from a disused VHF TV Yagi Beam.
The radiating element (folded dipole) provided the stub portion for two J-Poles. Bakelite pieces were used to ensure rigidity and also to locate the BNC connector.
The moulded plastic box was used for the second version of the J-Pole. For the stub portion, the 2 elements were shorted inside the box. A BNC connector was located at the lower end of the box. A length of PVC pipe was fastened to the box to facilitate mounting of the antenna.
'M-Seal’(epoxy sealant in dual component lump form) was used at the joints and to waterproof the connections.