[time-nuts] Favorite counters (current production)?

Dr. David Kirkby (Kirkby Microwave Ltd) drkirkby at kirkbymicrowave.co.uk
Sun Nov 12 12:12:20 EST 2017

On 10 November 2017 at 16:37, Bob Camp <kb8tq at 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.


23 years later, it is still a current product.

Stanford Research also sell a couple of LCR meters


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.


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