I am in the process on building a J-pole antenna for a 2 meter base station out of 1/2 inch copper.  I have a couple of questions regarding the construction of the antenna.

1st - I read instructions on the internet from a couple of sites on how to build the antenna.  In my haste, I skipped over the portion of the instructions that said to use rosin core solder, and instead used lead free plumbing flux and solder.  After re-examining the instructions, and realizing what I'd done, I read that the plumbing solder could break down at high frequency due to its acid content (acid core)?  I never realized plumbing solder or the flux had acid? The little voice in my head is telling me to unsolder the antenna, clean the joints, and use rosin core solder. Does anyone have any comments or experience with this? 

2nd - I recently received my SO-239 base mounts in the mail, and I'm pondering how to solder these to the J-pole.  The advice I found on the web said to tin the SO-239 and copper prior to soldering, once determining the location for lowest SWR.  What type of heat source would be recommended for this process so I don't destroy the center insulator of the SO-239?  Any other advice on this would be greatly appreciated. 

Thanks so much for taking the time to read this, and offering any advice.

73, KB7FSC - Wane