I have not used this radio for a few years. Now I want to get back to listening and would like to connect an external antenna. The DX-440 has a RCA connection for the external antenna. So this is what II'm thinking about setting up. Going to cut 65 feet of 24 gauge speaker cable. Going to pull apart so I have 25 feet on each side that would make a V. I would have 15 feet remaining and attach the end to MFJ 1702c - https://www.hamradio.com/detail.cfm?pid=H0-001006 Then I would attach a a PL259 adapter to RCA and use a RCA cable to connect to the back of my radio. So, I have 2 questions 1) What is the best way to connect the speaker wire to the MFJ 1702c that has a PL259 connection.2) Is it okay to use the RCA cable from MFJ 1702c to the radio with the adapter? Any suggestions would be greatly appreciated.