Unfortunately probably no manufacture is using Amphenol jacks. I have had N jack failures in equipment where non-Amphenol connectors lost their spring and I previously owned an Acom amp that had very loose fitting SO-239's. John KK9A from: Barry w2up Thu May 19 08:01:25 EDT 2016 Do you think whatever you're plugging into uses Amphenol SO-239's? Barry W2UP