[volt-nuts] New Life of the Solartron 7081
Hi! At last I completed the repairing and modifying the Solartron 7081 DMM: 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 ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
Re: [volt-nuts] New Life of the Solartron 7081
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 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 ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there. ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
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 fabi...@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.htmlhttp://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 __**_ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/** mailman/listinfo/volt-nutshttps://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there. __**_ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/** mailman/listinfo/volt-nutshttps://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there. ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
Re: [volt-nuts] New Life of the Solartron 7081
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.ka...@gmail.com To: Discussion of precise voltage measurement volt-nuts@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 fabi...@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.htmlhttp://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 __**_ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/** mailman/listinfo/volt-nutshttps://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there. __**_ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/** mailman/listinfo/volt-nutshttps://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there. ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there. ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
Re: [volt-nuts] New Life of the Solartron 7081
Yes, very impressive - Solartron should hire you as a consultant to design or improve their current products. Ed ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
