The practical answer is try to insert your coax into the bushing. RG-59 and RG8X are the same size and RG-58 is smaller. If RG-58 is sloppy in the bushing and RG-59 or RG8X fits then it is OK to use unless you are trying to get an exact match for micro-wave. If you are a micro-wave engineer you are more qualified than I, but for 6 meters and below the extremely small bump will not be noticeable. You are jousting windmills to avoid an impedence bump that you cannot see. Willis 'Cookie' Cooke, TDXS DX Chairman K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart
On Monday, October 13, 2014 12:42 PM, Sandy Blaize <ebj...@charter.net> wrote: YES!!!! The 75 ohm series are UG-260/U connectors, the 50 ohm series is the UG-88/U. If they don't have this stamped into the rear barrel of the connector, THEY ARE Counterfeits or JUST PLAIN TRASH! There is a lot of "crap" parts available at hamfests these days! Be careful what you buy!! 73, Sandy W5TVW On 10/13/2014 11:18 AM, Michael Walker wrote: > Thanks Jim > > I was going to ask that exact question. For the amateur world, does it > make a difference if a 75 ohm connector is installed on a 50 ohm feedline. > > You made it very clear for everyone. Thanks! > > Mike va3mw > > > On Mon, Oct 13, 2014 at 12:15 PM, Jim Brown <j...@audiosystemsgroup.com> > wrote: > >> On Sun,10/12/2014 6:32 PM, Acbross via Elecraft wrote: >> >>> Don't know where anyone got the idea that BNCs made for RG-8x we 75 ohm. >>> I worked in the tv industry for many years and we used hundreds of BNCs >>> that were made specifically for 75 ohm video. By the way, RG-59 not RG-79. >>> >> While you are entirely correct that there are 75 ohm and 50 ohm BNCs, the >> difference DOES NOT MATTER at HF, because the connector is such a small >> fraction of a wavelength and the difference is small. 75 ohm connectors >> were important with analog video because of the smearing of very fine >> detail in a high res image, and because studios do lots of patching and >> routing. >> >> 73, Jim K9YC >> >> ______________________________________________________________ >> 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 >> Message delivered to va...@portcredit.net >> > ______________________________________________________________ > 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 > Message delivered to ebj...@charter.net ______________________________________________________________ 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 Message delivered to wrco...@yahoo.com ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
