RE: "One seller, with the two high stability reference boards at $750, claims that they come from working and recently calibrated 3458As. Why would anyone wreck a working and recently calibrated 3458A? "
Some contracts may require the more stable reference and the standard reference is pulled to make room for the option 002. I know I have done that at lest 30 times. On Thu, Jan 29, 2015 at 12:59 PM, Dr. David Kirkby (Kirkby Microwave Ltd) < [email protected]> wrote: > On 27 Jan 2015 09:47, "Orin Eman" <[email protected]> wrote: > > > > There is a seller letting a slow trickle of them out there... they seem > to > > be going for about $165. The current batch of two is around $100, but > will > > probably be bid up. > > I am puzzled why there are so many reference boards that are supposed to > come from 3458As on the used market. It makes me wonder if they are > genuine. > > One seller, with the two high stability reference boards at $750, claims > that they come from working and recently calibrated 3458As. Why would > anyone wreck a working and recently calibrated 3458A? > > It is not beyond the bounds of possibility that a 3458A might be worth more > in parts than as a complete unit. I know this is true for some HP items, > but I doubt that is the case with a 3458A. > > Another seller, who has them at $395 "or offer", has sold 17 and has 11 > left. > > Although expensive, having two and monitoring the difference between them > would probably allow their stability to be measured with a DVM of modest > specification. > > There are lots of counterfeit components around, and I fear that it could > be some of these boards could fall into that category. This makes the > building a board from new components more attractive. In the short term it > is likely to be less stable than an old reference, but at least one would > know the history of it. If the components were sourced from reliable > sources, it would get around the potential counterfeit problem. > > Dave. > _______________________________________________ > 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. > -- *John Phillips* _______________________________________________ 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.
