hi andreas, yes, it was a vha512 (maybe 516, but dont think so, dont have data handy). I ordered it from their berlin area based distributor (powertron). I ordered a couple, but different values, so it was single piece price. was some time ago, so price may have increased by now.
adrian > Gesendet: Sonntag, 17. Mai 2015 um 22:00 Uhr > Von: "Andreas Jahn" <[email protected]> > An: "Discussion of precise voltage measurement" <[email protected]> > Betreff: Re: [volt-nuts] Bls: How accurate is a fluke after 9 years > > Hello Adrian, > > which actual type of resistor did you use. > And from where did you order it? > For which quantity is the 40 usd price? (single piece?) > > I guess it was one of the hzseries of vishay. right? > Perhaps a Y4725 (VHA512Z?) > http://www.vishaypg.com/docs/63120/hzseries.pdf > Was it including PMO? > > With best regards > > Andreas > > Am 17.05.2015 um 18:16 schrieb [email protected]: > > I have VPG hermetic foil resistors that drifted 0.2ppm/year (verified in > > cal lab). temp co. arround room temp <0,2ppm/k. my personal opinion, they > > are the best resistors for stability that you can purchse as a standard > > list item. Mine were < 40usd (4-wire, 0.1%, in reality they are better > > 0.01%). 2-wire types are probably cheaper. > > you cannot use standard foil resistors, they drift due to humidity, some 10 > > ppm easily pa. > > I would think Edward Petties do drift as well, most likely onsiderably more > > than the heremtic resistors, but probably less than vpg epoxy foil,(there > > is no drift spec against time from him), since his are not hermetic. And > > also, typically his temp drift is worse (1-3ppm/K versus <0,5). > > > > Adrian > > > >> Gesendet: Sonntag, 17. Mai 2015 um 03:40 Uhr > >> Von: "Anton Moehammad via volt-nuts" <[email protected]> > >> An: "[email protected]" <[email protected]>, "Discussion > >> of precise voltage measurement" <[email protected]> > >> Betreff: [volt-nuts] Bls: How accurate is a fluke after 9 years > >> > >> Hi All,What about Edward G Pettis resistor are they include in *THAT ARE > >> PROPERLY WELDED* > >> > >> > >> > >> Pada Minggu, 17 Mei 2015 2:11, Ken Peek <[email protected]> > >> menulis: > >> > >> > >> IMHO: Vishay metal-foil resistors are very good, but *ONLY* if you get > >> them in a hermetic package. Depending on where you are in the world, > >> this can be rather expensive [more or less]. Precision wire-wound > >> resistors made with with low TCR Evanohm wire *THAT ARE PROPERLY WELDED* > >> are the next best thing, and they don't cost you your first born... > >> > >> > >> _______________________________________________ > >> volt-nuts mailing list -- [email protected] > >> To unsubscribe, go to > >> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > >> and follow the instructions there. > >> > >> > >> > >> _______________________________________________ > >> volt-nuts mailing list -- [email protected] > >> To unsubscribe, go to > >> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > >> and follow the instructions there. > >> > > _______________________________________________ > > volt-nuts mailing list -- [email protected] > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > > and follow the instructions there. > > _______________________________________________ > volt-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. > _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
