The GenRad 874 connector was good to 4.5 Ghz and took a Banana plug in the center conductor without changing electrical characteristics!!!
http://www.ietlabs.com/pdf/GR_Experimenters/1948/GenRad_Experimenter_Oct_1948.pdf Not bad for a connector designed in 1948! It was largely supplanted by the APC-7 connector from Bunker-Ramo which was also a hermaphrodite design but had a 18 Ghz frequency limit Lots of Tek calibrators used this connector due to its good impedance matching without requiring obsessive connector maintenance as the APC-7 does (cleaning, gauging and finger replacement) Content by Scott Typos by Siri > On May 28, 2017, at 12:21 AM, djl <d...@montana.com> wrote: > > Yep, GR once made the best. The GR connector had at least three things going; > as noted hermaphroditic. No need for several sexes. Second, they are seamless > 50 ohms, very very small reflections at the connection. Third, banana plugs > (also a GR idea, I think) fit in the center "post" of the connector without > wrecking anything. GR also made an hermaphroditic connector good to several > GHz before passing into legend. . . > Don > > >> On 2017-05-27 05:01, Bob kb8tq wrote: >> Hi >>> On May 26, 2017, at 11:21 PM, Gary Woods <garygar...@earthlink.net> wrote: >>>> On Mon, 22 May 2017 05:59:59 -0700, you wrote: >>>> https://goo.gl/photos/tygN5ZFeFLUhc4zX6 >>>> Near Portland Oregon >>> Neat stuff...did anybody but GR use those hermaphrodite connectors? >> At one time, GR was pretty much the only source for a wide range of RF >> and microwave test gear. Anything that was going to work with that gear >> may have come with the GR connectors. That includes stuff like attenuators, >> cables, and other bits of “lab clutter”. When you checked the box for the >> GR connectors, the price went up quite a bit. That made the gizmos with >> the connectors on them a bit more rare than they otherwise would be. >> Bob >>> I have >>> an adapter for them that came with a wide-band amplifier; "delay line" >>> type, with a whole row of, I think, 6AK5s in it. >>> -- >>> Gary Woods AKA K2AHC- PGP key on request, or at >>> home.earthlink.net/~garygarlic >>> Zone 5/4 in upstate New York, 1420' elevation. NY WO G >>> --- >>> This email has been checked for viruses by AVG. >>> http://www.avg.com >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > -- > Dr. Don Latham > PO Box 404, Frenchtown, MT, 59834 > VOX: 406-626-4304 > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
