Hi Dave; I am not sure I saw you email, please contact me again off list to work out details.
Cheers; Thomas Knox Sr Test and Measurement Engineer Ascent Concepts and Technology 4475 Whitney Place Boulder Colorado 80305 1-303-554-0307 act...@hotmail.com ________________________________ From: volt-nuts <volt-nuts-boun...@febo.com> on behalf of Dr. David Kirkby (Kirkby Microwave Ltd) <drkir...@kirkbymicrowave.co.uk> Sent: Sunday, September 24, 2017 10:10 AM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] Power consumption of 3458A reference board / fitting one in a 3457A On 23 September 2017 at 18:03, Tom Knox <act...@hotmail.com> wrote: > If you want I will send you a few to play with for a few months. > Thank you very much. I'd like to have a play. I sent you a private email. Someone suggested using the DCV:DCV ratio mode to look at two references, but I don't see this facility on the 3457A. I think the only way to compare two of them would be to put them in series, but back-to-back to subtract the voltages, and look at the difference on the 3457A. > > Thomas Knox > It's odd there's someone selling LTZ1000A chips on eBay at $50 each. http://www.ebay.com/itm/1x-LTZ1000ACH-Ultra-Precision-Reference-LTZ1000A-/111325506311 [https://i.ebayimg.com/images/g/EGYAAOSwNRdX7g25/s-l300.jpg]<http://www.ebay.com/itm/1x-LTZ1000ACH-Ultra-Precision-Reference-LTZ1000A-/111325506311> 1x LTZ1000ACH Ultra Precision Reference LTZ1000A | eBay<http://www.ebay.com/itm/1x-LTZ1000ACH-Ultra-Precision-Reference-LTZ1000A-/111325506311> www.ebay.com 400°C/W Thermal Resistance for LTZ1000A Reduces. Insulation Requirements. Low Noise RF Oscillators. Standard Cells. | eBay! It looks like they have been removed from PCBs with a sledge hammer - they are heavily scratched and/or dented. The sellers seems to have sold quite a few, yet the chips are only marginally more expensive if bought new from the manufacturer. Dave _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts volt-nuts Info Page - American Febo Enterprises<https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts> www.febo.com volt-nuts is a low volume, high SNR list for the discussion of precise voltage measurement and related topics. To see the collection of prior postings to the list ... 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.
