Re: [volt-nuts] JJA progress report

2014-02-14 Thread Randy Evans
We'll all probably want a spare unit also. On Friday, February 14, 2014 11:02 AM, Tom Miller tmiller11...@verizon.net wrote: Can we get a group buy? - Original Message - From: Tom Knox act...@hotmail.com To: volt-nuts@febo.com Sent: Friday, February 14, 2014 12:50 PM Subject:

Re: [volt-nuts] Connector PN

2014-01-16 Thread Randy Evans
, 2014 7:44 AM, Bill Gold wpgold3...@att.net wrote: update The HP/AGILENT/KEYSIGHT P/N is 1251-6041 and is in stock at $5.13 ea. Bill - Original Message - From: Bill Gold wpgold3...@att.net To: Randy Evans randallgrayev...@yahoo.com; Discussion of precise voltage measurement volt-nuts

[volt-nuts] Connector PN

2014-01-15 Thread Randy Evans
Does anyone know the manufacturer and part number of the connectors used on the HP-3458 voltage reference board? thanks, Randy Evans ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo

Re: [volt-nuts] PWM voltage divider

2014-01-11 Thread Randy Evans
Charles, I did find some information in the thread. thanks, Randy On Thursday, January 9, 2014 5:33 PM, Charles Steinmetz csteinm...@yandex.com wrote: Randy wrote: Does anyone have sources for the Fluke 5440 manual and the Datron 4910 manuals with schematics.  I looked on K04BB's site

Re: [volt-nuts] PWM voltage divider

2014-01-09 Thread Randy Evans
Charles, I looked over the list of videos on eevblog but I didn't see anything on Datron equipment. The list is not indexed so I had to manually search the list. I looked several times to no avail. Do know which episode it was? Randy Evans -- On Thu, Jan 9

Re: [volt-nuts] Fluke 845 Modification

2013-12-29 Thread Randy Evans
Frank, The specs for the ICL7650on page 3 of the data sheet show a max bias current of 200 pa AT 85C (the ICL7650b is no longer available), higher than the LTC2054 at 150 pA at 150C.  The 845 will not be operating higher than 40C ambient, for a typical test lab environment, and the temp rise

Re: [volt-nuts] Fluke 845 Modification LTC2057

2013-12-28 Thread Randy Evans
John, I looked at the LTC2057 but it doesn't go down to 3V operation (4.75 V min) and I want to power the Fluke 845 with 3V lithiums.  In addition, the LTC2054 has a lower input bias current (1 pA at 25 C).  I wanted the lower bias current since I want to use the circuit to upgrade an HP-419A

[volt-nuts] Fluke 887A Modifications

2013-12-22 Thread Randy Evans
.  Just send me an e-mail request. Randy Evans ___ 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] Resistors for LTZ1000A circuit

2013-12-09 Thread Randy Evans
haven't contacted them directly. Thanks, Randy Evans ___ 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.

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