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<[email protected]> Sent: Sat, Mar 15, 2014 at 09:35 PM To: <[email protected]> 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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
