Dave, That type you describe is "non-captive", as the center pin is not an integral part of the connector body.
The crimp on pin, and "snap into shell" type still leave some margin of error. If the tech gets the center conductor too long, there is a possibility of the braid portion not being inserted enough to get proper crimping action with the ferrule. Additionally, the longer center conductor and pin allows a space to be created between the foam dielectric and the dielectric between the center pin and the connector body. This MAY cause problems. YMMV, but if any install step or calculation which has to be performed by a tech can be eliminated, the percentages of correct connections goes up. Mis dos centavos. Milt, N5IA ----- Original Message ----- From: "dave" <[email protected]> To: "Milt, N5IA" <[email protected]> Cc: "Ken Kopp" <[email protected]>; <[email protected]> Sent: Friday, July 23, 2010 9:12 AM Subject: Re: [Elecraft] OT: Pin migration in Type N connectors > > Curious, how does one identify a 'captive' center pin from a 'non-captive' > one? > > I typically use the crimp-on type N's from RF Industries and wonder which > category those fall into. For those who are not familiar with these > connectors, the pins crimp onto the center conductor and then snap into > the shell. > > > 73 de dave > ab9ca/4 > > > > > Milt, N5IA wrote: >> I have been using the Times series of crimp-on "N" male connectors with >> the captive center pin for the past 10+ years. In particular, IMHO, the >> Times EZ-400-NMH for use on LMR-400 has been a boon to the communications >> industry. >> >> My group has installed thousands of them for use at 2.4 GHz and 5.8 GHz. >> No failures unless a tech made an install mistake with one of them. >> >> As Ken has indicated, they are highly recommended because of the >> potential pin migration problem AND for proper pin placement. >> >> Good luck to all. Have a great weekend. >> >> 73 de Milt, N5IA >> >> ----- Original Message ----- >> From: "Ken Kopp" <[email protected]> >> To: <[email protected]> >> Sent: Friday, July 23, 2010 8:42 AM >> Subject: [Elecraft] OT: Pin migration in Type N connectors >> >> >> >>> I use UG-1185's for almost all of my N males here. >>> They have a captive center pin. >>> >>> Otherwise, center pin migration -can- be a problem >>> here in Montana with it's temperature extremes. (;-) >>> >>> 73! Ken Kopp - K0PP >>> [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 >> >> ______________________________________________________________ >> 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 >> >> >> ______________________________________________________________ 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
