I have been playing around with a new magnetic loop antenna and a RTL-SDR dongle. I would like to try the antenna to a couple of receivers that I have. The antenna has a BNC connector but I have cobbled together contections to link it to the RG-173 SMA cable that was included in the dongle antenna kit. Is there some connector that I can get to link SMA to a 3.5 mm plug to fit the other radios?