Some of the old one eighth inch plugs out of the 60s will not make contact in the newer jacks. These are the two conductor type. So I think that years ago a 1/8 plug was really a 1/8 plug.
Sent from my iPhone this time > On Mar 16, 2014, at 12:07 AM, Mark Petiford <rv6am...@yahoo.com> wrote: > > Re: "Are they REALLY 0.137795 inches or is 3.5mm just a rounded off way to > describe the same physical part using two > different measurement standards?" > > Charlie, > > Not sure you are going to get a real definitive answer, but I now believe the > 1/8" designation is just a rounded off way to describe a 3.5mm connector. I > didn't believe that before this thread got going. > > I dug out all the old connectors I could find from the very bottom of my junk > box and measured them. All of them measured 3.5mm (0.138") as best I could > read on my calipers. None were below 0.137. I thought for sure I would find > some that were 1/8" (0.125") dia., because I remember buying some of them > from the local "exploded television" store that were marked as 1/8" phone > plugs. I think those were all mono, not stereo. In those days, I didn't > have a set of calipers or a micrometer to check them, so I just assumed they > were 0.125" dia. Looks like that assumption was wrong. > > Whoever wrote the Wikipedia entry on "3.5mm Plug" agrees that 1/8" is just an > approximate description used in some countries, and that they actually > measure 3.5mm (0.138") diameter, which agrees with my junk box. I also did a > search of Mouser looking for 1/8" Plugs, and all I came up with was 3.5mm > plugs. > > My memory still recalls seeing connectors that wouldn't quite fit together > correctly, but I don't have any that I can find now...and I have some pretty > old junk. Just ask my wife! ;-) > > 73 > Mark > KE6BB > > From: Charlie T, K3ICH<pin...@erols.com> > Sent: Sat, Mar 15, 2014 at 09:35 PM > To: <elecraft@mailman.qth.net> > Subject: Re: [Elecraft] Powerpole police here.... > > That doesn't answer my question..... Are they REALLY 0.137795 inches or is > 3.5mm just a rounded off way to describe the same physical part using two > different measurement standards? > > 73, Charlie k3ICH > > > l > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
