[volt-nuts] New Life of the Solartron 7081
mark.kahrs at gmail.com
Thu Jan 10 13:37:47 UTC 2013
I think the preceding article:
Is even more interesting!
So, why did you post this on a chinese BBS Mickle? (just curious)
On Thu, Jan 10, 2013 at 6:02 AM, Fabio Eboli <FabioEb at quipo.it> wrote:
> Although way above my knowledge and skills,
> thank you very much for sharing, excellent
> work and read, Mickle!!
> Il 2013-01-10 10:08 Михаил ha scritto:
>> At last I completed the repairing and modifying the Solartron 7081 DMM:
>> Zener reference was totally dismounted and replaced with DIY LTZ1000
>> Moreover the floating logic PLL clock was made a switchable to
>> crystal oscillator
>> with a lower phase noise.
>> After all, low-frequency noise is halved to 0.028 ppm (better than
>> Keitley 2002,
>> Datron 1271 and Advantest 6581T), TempCo is less 0.2 ppm/C, long-term
>> approximation is 1-2 ppm/year.
>> Mickle T./iddqd2001
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