I have created a shared link to my working folder with the details of the HP-419A and Fluke 845A modifications. It is an in-process design so I suspect there may be many questions. Just send your questions and I will try to answer them. In the meantime, I will try to find time to clean up the design a bit. Hopefully I created the link correctly. Let me know if you have any issues with the link. https://www.dropbox.com/sh/7b3hsy0j0wq35hw/AABkmVptTwVu2EJFRqtSdAjya?dl=0 Randy Evans AE6YG

Rady, Many thanks for the uploads. One issue... the marked-up PDF of the HP 419A schematic is virtually unreadable. Could you post a higher resolution image of the markup details? Don't really need the full schematic, just the areas where the connections to the new circuit are made. Thanks again, Dave M Randy Evans wrote: > I have created a shared link to my working folder with the details of > the HP-419A and Fluke 845A modifications. It is an in-process design > so I suspect there may be many questions. Just send your questions > and I will try to answer them. In the meantime, I will try to find > time to clean up the design a bit. > > Hopefully I created the link correctly. Let me know if you have any > issues with the link. > > https://www.dropbox.com/sh/7b3hsy0j0wq35hw/AABkmVptTwVu2EJFRqtSdAjya?dl=0 > > > Randy Evans AE6YG

Dave, I should have checked it. I will generate a higher resolution version tomorrow. Randy On Wed, Jun 24, 2015 at 10:49 AM, Dave M <dgminala@mediacombb.net> wrote: > Rady, > Many thanks for the uploads. > One issue... the marked-up PDF of the HP 419A schematic is virtually > unreadable. Could you post a higher resolution image of the markup > details? Don't really need the full schematic, just the areas where the > connections to the new circuit are made. > > > Thanks again, > Dave M > > > Randy Evans wrote: > >> I have created a shared link to my working folder with the details of >> the HP-419A and Fluke 845A modifications. It is an in-process design >> so I suspect there may be many questions. Just send your questions >> and I will try to answer them. In the meantime, I will try to find >> time to clean up the design a bit. >> >> Hopefully I created the link correctly. Let me know if you have any >> issues with the link. >> >> https://www.dropbox.com/sh/7b3hsy0j0wq35hw/AABkmVptTwVu2EJFRqtSdAjya?dl=0 >> >> >> Randy Evans AE6YG >> > > > _______________________________________________ > 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. >

Dave, I checked the HP-419A marked up schematic and I find it very clear and readable. Does anyone else have problem reading the pdf file? Thanks, Randy Evans On Wed, Jun 24, 2015 at 6:38 PM, Randy Evans <randyevans2688@gmail.com> wrote: > Dave, > > I should have checked it. I will generate a higher resolution version > tomorrow. > > Randy > > On Wed, Jun 24, 2015 at 10:49 AM, Dave M <dgminala@mediacombb.net> wrote: > >> Rady, >> Many thanks for the uploads. >> One issue... the marked-up PDF of the HP 419A schematic is virtually >> unreadable. Could you post a higher resolution image of the markup >> details? Don't really need the full schematic, just the areas where the >> connections to the new circuit are made. >> >> >> Thanks again, >> Dave M >> >> >> Randy Evans wrote: >> >>> I have created a shared link to my working folder with the details of >>> the HP-419A and Fluke 845A modifications. It is an in-process design >>> so I suspect there may be many questions. Just send your questions >>> and I will try to answer them. In the meantime, I will try to find >>> time to clean up the design a bit. >>> >>> Hopefully I created the link correctly. Let me know if you have any >>> issues with the link. >>> >>> https://www.dropbox.com/sh/7b3hsy0j0wq35hw/AABkmVptTwVu2EJFRqtSdAjya?dl=0 >>> >>> >>> Randy Evans AE6YG >>> >> >> >> _______________________________________________ >> 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. >> > >

Randy, False alarm. When I downloaded the PDF again, it came through fine. The file that I downloaded originally was only about 75K, not the 500K file that I got the second time. Sorry for the alarm. Thanks again for sharing your work. Dave M Randy Evans wrote: > Dave, > > I checked the HP-419A marked up schematic and I find it very clear and > readable. Does anyone else have problem reading the pdf file? > > Thanks, > > Randy Evans > > On Wed, Jun 24, 2015 at 6:38 PM, Randy Evans > <randyevans2688@gmail.com> wrote: > >> Dave, >> >> I should have checked it. I will generate a higher resolution >> version tomorrow. >> >> Randy >> >> On Wed, Jun 24, 2015 at 10:49 AM, Dave M <dgminala@mediacombb.net> >> wrote: >> >>> Rady, >>> Many thanks for the uploads. >>> One issue... the marked-up PDF of the HP 419A schematic is virtually >>> unreadable. Could you post a higher resolution image of the markup >>> details? Don't really need the full schematic, just the areas where >>> the connections to the new circuit are made. >>> >>> >>> Thanks again, >>> Dave M >>> >>> >>> Randy Evans wrote: >>> >>>> I have created a shared link to my working folder with the details >>>> of the HP-419A and Fluke 845A modifications. It is an in-process >>>> design so I suspect there may be many questions. Just send your >>>> questions and I will try to answer them. In the meantime, I will >>>> try to find time to clean up the design a bit. >>>> >>>> Hopefully I created the link correctly. Let me know if you have >>>> any issues with the link. >>>> >>>> https://www.dropbox.com/sh/7b3hsy0j0wq35hw/AABkmVptTwVu2EJFRqtSdAjya?dl=0 >>>> >>>> >>>> Randy Evans AE6YG >>>>

For all, working on a modification of the HP-419A: I have uploaded to my HP-419A share point some high quality schematics, I have created for the modification process. Link: https://www.dropbox.com/sh/czd2uc3t0uvgggz/AAC--ykVziW9rSJkdg2J_-wZa?dl=0 Important note: I created them using PaintNET on 64-bit Win7. It may impossible to open them with the 32-bit Win7 version because of the memory restrictions. I uploaded following files: HP419A optimized original schematic complete (with doc).PDN (the original amplifier schematic with some additional notes) HP419A optimized original schematic complete.PDN (the original amplifier schematic) HP419A optimized original schematic (3µV mode).PDN (amplifier schematic in the 3µV mode) Enjoy and feel free to comment. BR PeLuLe     Gesendet: Donnerstag, 25. Juni 2015 um 18:55 Uhr Von: "Dave M" <dgminala@mediacombb.net> An: "Discussion of precise voltage measurement" <volt-nuts@febo.com> Betreff: Re: [volt-nuts] HP-419A Fluke 845A Mods - shared link Randy, False alarm. When I downloaded the PDF again, it came through fine. The file that I downloaded originally was only about 75K, not the 500K file that I got the second time. Sorry for the alarm. Thanks again for sharing your work. Dave M Randy Evans wrote: > Dave, > > I checked the HP-419A marked up schematic and I find it very clear and > readable. Does anyone else have problem reading the pdf file? > > Thanks, > > Randy Evans > > On Wed, Jun 24, 2015 at 6:38 PM, Randy Evans > <randyevans2688@gmail.com> wrote: > >> Dave, >> >> I should have checked it. I will generate a higher resolution >> version tomorrow. >> >> Randy >> >> On Wed, Jun 24, 2015 at 10:49 AM, Dave M <dgminala@mediacombb.net> >> wrote: >> >>> Rady, >>> Many thanks for the uploads. >>> One issue... the marked-up PDF of the HP 419A schematic is virtually >>> unreadable. Could you post a higher resolution image of the markup >>> details? Don't really need the full schematic, just the areas where >>> the connections to the new circuit are made. >>> >>> >>> Thanks again, >>> Dave M >>> >>> >>> Randy Evans wrote: >>> >>>> I have created a shared link to my working folder with the details >>>> of the HP-419A and Fluke 845A modifications. It is an in-process >>>> design so I suspect there may be many questions. Just send your >>>> questions and I will try to answer them. In the meantime, I will >>>> try to find time to clean up the design a bit. >>>> >>>> Hopefully I created the link correctly. Let me know if you have >>>> any issues with the link. >>>> >>>> https://www.dropbox.com/sh/7b3hsy0j0wq35hw/AABkmVptTwVu2EJFRqtSdAjya?dl=0 >>>> >>>> >>>> Randy Evans AE6YG >>>> _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts[https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts] and follow the instructions there.

The .PDN image files can be opened on Win XP, Win7 & Win8 with Irfanview if you download and install the plugin package from the Irfanview web site. I use XP 32-bit, and the files opened just fine for me. Cheers, Dave M Ludger.Lenzen@gmx.de wrote: > For all, working on a modification of the HP-419A: > I have uploaded to my HP-419A share point some high quality > schematics, I have created for the modification process. > Link: > https://www.dropbox.com/sh/czd2uc3t0uvgggz/AAC--ykVziW9rSJkdg2J_-wZa?dl=0 > > Important note: > I created them using PaintNET on 64-bit Win7. > It may impossible to open them with the 32-bit Win7 version because > of the memory restrictions. > > I uploaded following files: > HP419A optimized original schematic complete (with doc).PDN (the > original amplifier schematic with some additional notes) > HP419A optimized original schematic complete.PDN (the original > amplifier schematic) > HP419A optimized original schematic (3µV mode).PDN (amplifier > schematic in the 3µV mode) > > Enjoy and feel free to comment. > BR > PeLuLe > > > > > > Gesendet: Donnerstag, 25. Juni 2015 um 18:55 Uhr > Von: "Dave M" <dgminala@mediacombb.net> > An: "Discussion of precise voltage measurement" <volt-nuts@febo.com> > Betreff: Re: [volt-nuts] HP-419A Fluke 845A Mods - shared link > Randy, > False alarm. When I downloaded the PDF again, it came through fine. > The > file that I downloaded originally was only about 75K, not the 500K > file that > I got the second time. > > Sorry for the alarm. > > Thanks again for sharing your work. > Dave M > > > Randy Evans wrote: >> Dave, >> >> I checked the HP-419A marked up schematic and I find it very clear >> and readable. Does anyone else have problem reading the pdf file? >> >> Thanks, >> >> Randy Evans >> >> On Wed, Jun 24, 2015 at 6:38 PM, Randy Evans >> <randyevans2688@gmail.com> wrote: >> >>> Dave, >>> >>> I should have checked it. I will generate a higher resolution >>> version tomorrow. >>> >>> Randy >>> >>> On Wed, Jun 24, 2015 at 10:49 AM, Dave M <dgminala@mediacombb.net> >>> wrote: >>> >>>> Rady, >>>> Many thanks for the uploads. >>>> One issue... the marked-up PDF of the HP 419A schematic is >>>> virtually unreadable. Could you post a higher resolution image of >>>> the markup details? Don't really need the full schematic, just the >>>> areas where the connections to the new circuit are made. >>>> >>>> >>>> Thanks again, >>>> Dave M >>>> >>>> >>>> Randy Evans wrote: >>>> >>>>> I have created a shared link to my working folder with the details >>>>> of the HP-419A and Fluke 845A modifications. It is an in-process >>>>> design so I suspect there may be many questions. Just send your >>>>> questions and I will try to answer them. In the meantime, I will >>>>> try to find time to clean up the design a bit. >>>>> >>>>> Hopefully I created the link correctly. Let me know if you have >>>>> any issues with the link. >>>>> >>>>> https://www.dropbox.com/sh/7b3hsy0j0wq35hw/AABkmVptTwVu2EJFRqtSdAjya?dl=0 >>>>> >>>>> >>>>> Randy Evans AE6YG >>>>>