That reminds me, should anyone have a schematic for an SR 830 walking amplifier, can you please get in touch with me. I have one that keeps eating voltage regulators.
> On Nov 12, 2017, at 12:12, Dr. David Kirkby (Kirkby Microwave Ltd) > <drkir...@kirkbymicrowave.co.uk> wrote: > >> On 10 November 2017 at 16:37, Bob Camp <kb...@n1k.org> wrote: >> >> Hi >> >> There is no perfect answer. I’d go with the 53230 simply because it >> *might* be supported >> the longest. >> >> Bob >> > > > If I had to take a bet, I would say the SR620 will be supported longer. > Stanford Research seem to be selling the same products they have for > decades. I started my Ph.D. in about 1994, and bought what was a very new > product - the SR830 lock in amplifier. > > http://www.thinksrs.com/products/SR810830.htm > > 23 years later, it is still a current product. > > Stanford Research also sell a couple of LCR meters > > http://www.thinksrs.com/products/SR715720.htm > > The SR720 looks remarkably like the long obsolete HP E4925A LCR meter. > > There's no doubt in my mind that Stanford Research sell their products much > longer than HP/Agilent/Keysight. Of course, that does mean Stanford > Research are using older technology. > > I would add, when I have contacted Keysight about obsolete products they > have always been helpful. When I contacted Stanford Research to ask what > was the latest firmware for an SR620, I was ignored. They also ignored some > other email I sent them. So their support does not seem as good as > Keysight, but I assume, with persistence, one could get support on a > current product. > > Dave > _______________________________________________ > 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.