[volt-nuts] New Life of the Solartron 7081

[shalimr9 at gmail.com]

That is quite the reverse engineering effort! Congratulations Mickle!

It is good to see such a quality effort paying off.

Didier KO4BB 

Sent from my Droid Razr 4G LTE wireless tracker.



-----Original Message-----
From: Mark Kahrs <mark.kahrs at gmail.com>
To: Discussion of precise voltage measurement <volt-nuts at febo.com>
Sent: Thu, 10 Jan 2013 7:38 AM
Subject: Re: [volt-nuts] New Life of the Solartron 7081

I think the preceding article:

http://bbs.38hot.net/read-htm-tid-15406.html

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!!
>
> Fabio.
>
> Il 2013-01-10 10:08 Михаил ha scritto:
>
>  Hi!
>> At last I completed the repairing and modifying the Solartron 7081 DMM:
>> http://bbs.38hot.net/read-htm-**tid-36350.html<http://bbs.38hot.net/read-htm-tid-36350.html>
>> Zener reference was totally dismounted and replaced with DIY LTZ1000
>> board.
>> 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
>> drift
>> approximation is 1-2 ppm/year.
>>
>> Regards,
>> Mickle T./iddqd2001
>>
>>
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