The next time someone challenges me on why I only use BNC and Type N connectors, I’m going to send them this entire discussion.
wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Sep 17, 2018, at 4:41 PM, Don Wilhelm <[email protected]> wrote: > > Andy, > > The PL259 to SO239 connector "end face" contact is provided only by pressure > - it is not a sliding contact as you would find in a BNC or an N connector. > The pressure is provided only by the tightening of the threaded portion of > the PL259. > > I ask you - just how much resistance can be expected if you just touch two > ends of wires together without further positive contact? > > The "insulating spacer" is any oxidation on either the SO239 or the PL259. > That is why I like silver plated UHF connectors. They may look a bit > corroded, but the silver oxide is conductive even though it can appear brown > or black. If you are shopping for UHF connectors at hamfests, avoid all > those nickel-plated ones that a not Amphenol, but flock to those that are > oxidized, and silver plated with Mil Spec designations on them. > > 73, > Don W3FPR > > On 9/17/2018 6:39 PM, ANDY DURBIN wrote: >> " the threads of the PL259 are providing the only contact with the SO239" >> In the connectors that you are mating how do you prevent contact between the >> end face of the PL259 body and the end face of the SO239 body? You would >> need an insulating spacer for your statement to be true. > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
