And there was the HP 540 and the HP 2590B... I still use a HP 2590B for frequency measurement and in conjunction with a HP 851B display as a spectrum analyzer.
John WA4WDL > > On June 8, 2017 at 8:35 AM Scott McGrath <[email protected]> wrote: > > The heterodyne trick has been done before the first > 'Modern' frequency counter the HP 5245 used plug ins to extend its range > to 18 Ghz by doing exactly that. The plug in contained a tunable LO mixer and > indicator to show tuning lock > > These were a pain to use but they beat the 'frequency meters' by a mile > > Content by Scott > Typos by Siri > > > > > > On Apr 26, 2017, at 2:52 PM, al wolfe <[email protected]> wrote: > > > > such > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > > > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
