To All, The final modification of the Fluke null meters with LED's is completed. The results is impressive, keeping the basic original circuit of the meters. My rev 8 AR version has a double diode in the output stage which seems to remove the zeroing hysteresis around a zero reading was also made to my 845AB. Implementing two 1.2v reference diodes in the zeroing circuit greatly improved the zero drift for the zeroing control. There were also changes to the feedback response by changing two capacitors. If anyone is interested, please E-mail me at my personal address. dosmith@outlook.com Dallas

Dallas, I have a noisy 845AR, so I am keenly interested in your modifications. Thank you, Joe Hobart Flagstaff, Arizona On 11/23/2014 11:29 AM, Dallas Smith wrote: > To All, > > The final modification of the Fluke null meters with LED's is completed. The > results is impressive, keeping the basic original circuit of the meters. My rev > 8 AR version has a double diode in the output stage which seems to remove the > zeroing hysteresis around a zero reading was also made to my 845AB. Implementing > two 1.2v reference diodes in the zeroing circuit greatly improved the zero drift > for the zeroing control. There were also changes to the feedback response by > changing two capacitors. If anyone is interested, please E-mail me at my > personal address. > > dosmith@outlook.com > > Dallas >

Please send me an email so I can put you in my special address book for the info. > Date: Sun, 23 Nov 2014 12:51:32 -0700 > From: nova@npgcable.com > To: volt-nuts@febo.com > Subject: Re: [volt-nuts] Completion of LED Mod's for the Fluke 845AB & 845AR Null Meter. > > Dallas, > > I have a noisy 845AR, so I am keenly interested in your modifications. > > Thank you, > Joe Hobart > Flagstaff, Arizona > > > On 11/23/2014 11:29 AM, Dallas Smith wrote: > > To All, > > > > The final modification of the Fluke null meters with LED's is completed. The > > results is impressive, keeping the basic original circuit of the meters. My rev > > 8 AR version has a double diode in the output stage which seems to remove the > > zeroing hysteresis around a zero reading was also made to my 845AB. Implementing > > two 1.2v reference diodes in the zeroing circuit greatly improved the zero drift > > for the zeroing control. There were also changes to the feedback response by > > changing two capacitors. If anyone is interested, please E-mail me at my > > personal address. > > > > dosmith@outlook.com > > > > Dallas > > > _______________________________________________ > 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.

How do I make my RTF attachment available to Volt-nuts? I do not trust cloud servers and the like. Dallas On 11/23/2014 1:29 PM, Dallas Smith wrote: > To All, > > The final modification of the Fluke null meters with LED's is > completed. The results is impressive, keeping the basic original > circuit of the meters. My rev 8 AR version has a double diode in the > output stage which seems to remove the zeroing hysteresis around a > zero reading was also made to my 845AB. Implementing two 1.2v > reference diodes in the zeroing circuit greatly improved the zero > drift for the zeroing control. There were also changes to the feedback > response by changing two capacitors. If anyone is interested, please > E-mail me at my personal address. > > dosmith@outlook.com > > Dallas > _______________________________________________ > 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. > >

Dallas, Thanks for the information. Would you be opposed to uploading it to the KO4BB website? I think Didier could place it in a Fluke 845AB/AR folder. I could upload it with a copy of the manuals and send him an email. Todd On Sun, Nov 23, 2014 at 10:02 PM, Dallas Smith <dosmith@outlook.com> wrote: > How do I make my RTF attachment available to Volt-nuts? I do not trust > cloud servers and the like. > > Dallas > > > On 11/23/2014 1:29 PM, Dallas Smith wrote: > >> To All, >> >> The final modification of the Fluke null meters with LED's is completed. >> The results is impressive, keeping the basic original circuit of the >> meters. My rev 8 AR version has a double diode in the output stage which >> seems to remove the zeroing hysteresis around a zero reading was also made >> to my 845AB. Implementing two 1.2v reference diodes in the zeroing circuit >> greatly improved the zero drift for the zeroing control. There were also >> changes to the feedback response by changing two capacitors. If anyone is >> interested, please E-mail me at my personal address. >> >> dosmith@outlook.com >> >> Dallas >> _______________________________________________ >> 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. >

Thank you, that will be fine. I'm getting swamped with request. could you start a volt-nuts thead to its location? > Date: Sun, 23 Nov 2014 22:20:17 -0500 > From: tmicallef@gmail.com > To: volt-nuts@febo.com > Subject: Re: [volt-nuts] Completion of LED Mod's for the Fluke 845AB & 845AR Null Meter. > > Dallas, > > Thanks for the information. > > Would you be opposed to uploading it to the KO4BB website? I think Didier > could place it in a Fluke 845AB/AR folder. I could upload it with a copy of > the manuals and send him an email. > > Todd > > On Sun, Nov 23, 2014 at 10:02 PM, Dallas Smith <dosmith@outlook.com> wrote: > > > How do I make my RTF attachment available to Volt-nuts? I do not trust > > cloud servers and the like. > > > > Dallas > > > > > > On 11/23/2014 1:29 PM, Dallas Smith wrote: > > > >> To All, > >> > >> The final modification of the Fluke null meters with LED's is completed. > >> The results is impressive, keeping the basic original circuit of the > >> meters. My rev 8 AR version has a double diode in the output stage which > >> seems to remove the zeroing hysteresis around a zero reading was also made > >> to my 845AB. Implementing two 1.2v reference diodes in the zeroing circuit > >> greatly improved the zero drift for the zeroing control. There were also > >> changes to the feedback response by changing two capacitors. If anyone is > >> interested, please E-mail me at my personal address. > >> > >> dosmith@outlook.com > >> > >> Dallas > >> _______________________________________________ > >> 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. > > > _______________________________________________ > 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.

I have uploaded the mod file to the ko4bb ftp server. I could not find the AR or AB manuals so I also added them. Right now they are sitting in the Recent Uploads directory. Todd On Sun, Nov 23, 2014 at 10:31 PM, Dallas Smith <dosmith@outlook.com> wrote: > Thank you, that will be fine. I'm getting swamped with request. could you > start a volt-nuts thead to its location? > > > Date: Sun, 23 Nov 2014 22:20:17 -0500 > > From: tmicallef@gmail.com > > To: volt-nuts@febo.com > > Subject: Re: [volt-nuts] Completion of LED Mod's for the Fluke 845AB & > 845AR Null Meter. > > > > Dallas, > > > > Thanks for the information. > > > > Would you be opposed to uploading it to the KO4BB website? I think Didier > > could place it in a Fluke 845AB/AR folder. I could upload it with a copy > of > > the manuals and send him an email. > > > > Todd > > > > On Sun, Nov 23, 2014 at 10:02 PM, Dallas Smith <dosmith@outlook.com> > wrote: > > > > > How do I make my RTF attachment available to Volt-nuts? I do not trust > > > cloud servers and the like. > > > > > > Dallas > > > > > > > > > On 11/23/2014 1:29 PM, Dallas Smith wrote: > > > > > >> To All, > > >> > > >> The final modification of the Fluke null meters with LED's is > completed. > > >> The results is impressive, keeping the basic original circuit of the > > >> meters. My rev 8 AR version has a double diode in the output stage > which > > >> seems to remove the zeroing hysteresis around a zero reading was also > made > > >> to my 845AB. Implementing two 1.2v reference diodes in the zeroing > circuit > > >> greatly improved the zero drift for the zeroing control. There were > also > > >> changes to the feedback response by changing two capacitors. If > anyone is > > >> interested, please E-mail me at my personal address. > > >> > > >> dosmith@outlook.com > > >> > > >> Dallas > > >> _______________________________________________ > > >> 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. > > > > > _______________________________________________ > > 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. >

Thank you Todd Dallas > Date: Sun, 23 Nov 2014 23:13:11 -0500 > From: tmicallef@gmail.com > To: volt-nuts@febo.com > Subject: Re: [volt-nuts] Completion of LED Mod's for the Fluke 845AB & 845AR Null Meter. > > I have uploaded the mod file to the ko4bb ftp server. I could not find the > AR or AB manuals so I also added them. Right now they are sitting in the > Recent Uploads directory. > > > Todd > > On Sun, Nov 23, 2014 at 10:31 PM, Dallas Smith <dosmith@outlook.com> wrote: > > > Thank you, that will be fine. I'm getting swamped with request. could you > > start a volt-nuts thead to its location? > > > > > Date: Sun, 23 Nov 2014 22:20:17 -0500 > > > From: tmicallef@gmail.com > > > To: volt-nuts@febo.com > > > Subject: Re: [volt-nuts] Completion of LED Mod's for the Fluke 845AB & > > 845AR Null Meter. > > > > > > Dallas, > > > > > > Thanks for the information. > > > > > > Would you be opposed to uploading it to the KO4BB website? I think Didier > > > could place it in a Fluke 845AB/AR folder. I could upload it with a copy > > of > > > the manuals and send him an email. > > > > > > Todd > > > > > > On Sun, Nov 23, 2014 at 10:02 PM, Dallas Smith <dosmith@outlook.com> > > wrote: > > > > > > > How do I make my RTF attachment available to Volt-nuts? I do not trust > > > > cloud servers and the like. > > > > > > > > Dallas > > > > > > > > > > > > On 11/23/2014 1:29 PM, Dallas Smith wrote: > > > > > > > >> To All, > > > >> > > > >> The final modification of the Fluke null meters with LED's is > > completed. > > > >> The results is impressive, keeping the basic original circuit of the > > > >> meters. My rev 8 AR version has a double diode in the output stage > > which > > > >> seems to remove the zeroing hysteresis around a zero reading was also > > made > > > >> to my 845AB. Implementing two 1.2v reference diodes in the zeroing > > circuit > > > >> greatly improved the zero drift for the zeroing control. There were > > also > > > >> changes to the feedback response by changing two capacitors. If > > anyone is > > > >> interested, please E-mail me at my personal address. > > > >> > > > >> dosmith@outlook.com > > > >> > > > >> Dallas > > > >> _______________________________________________ > > > >> 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. > > > > > > > _______________________________________________ > > > 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. > > > _______________________________________________ > 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.

To All, Anyone who received the RTF file for the Fluke meter mod, the latest revision can be found at ko44's FTB server. This will be the final source for the modifications. Dallas > > The final modification of the Fluke null meters with LED's is > completed. The results is impressive, keeping the basic original > circuit of the meters. My rev 8 AR version has a double diode in the > output stage which seems to remove the zeroing hysteresis around a > zero reading was also made to my 845AB. Implementing two 1.2v > reference diodes in the zeroing circuit greatly improved the zero > drift for the zeroing control. There were also changes to the feedback > response by changing two capacitors. > > Dallas > _______________________________________________ > 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. > >