Re: [volt-nuts] Fluke 735C - Information Needed
Same color scheme on the batteries in the 5315A. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Chuck Harris Sent: Tuesday, September 10, 2013 10:30 PM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] Fluke 735C - Information Needed Nope, I was talking about GE and their early Nicads.. And, the cylindrical sealed LEAD acid cells were also originally commercialized by GE. They later spun off that division to became GATES. I had an old SOLA UPS that was made in the mid 1960's that was full of GE SLA's... The color scheme of the cells was exactly the same as the later GATES cells. (Black bottom, white top with red trim...) and I had an old Sulzer 2.5A double oven oscillator that was full of the GE Nicads from about 1960. GE was big in battery research in the late 50's, early 60's. I don't recall the exact order, but there is a big connection between GE, Gould, and GATES batteries. ... both Nicads and SLA's. -Chuck Harris J. L. Trantham wrote: > Chuck, > > Do you mean 'commercialize the cylindrical sealed LEAD cells'? The > cylindrical cells in the 6 V battery that powers the HP 5315A is a > Gates IIRC. > > Joe > > -Original Message- > From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] > On Behalf Of Chuck Harris > Sent: Tuesday, September 10, 2013 9:53 AM > To: Discussion of precise voltage measurement > Subject: Re: [volt-nuts] Fluke 735C - Information Needed > > As I recall, GE was first to commercialize the cylindrical sealed > Nicad cells. They spun off their battery division to Gould, then to > GATES... or some such memory muddled permutation like that... > > -Chuck Harris ___ 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] Fluke 735C - Information Needed
Nope, I was talking about GE and their early Nicads.. And, the cylindrical sealed LEAD acid cells were also originally commercialized by GE. They later spun off that division to became GATES. I had an old SOLA UPS that was made in the mid 1960's that was full of GE SLA's... The color scheme of the cells was exactly the same as the later GATES cells. (Black bottom, white top with red trim...) and I had an old Sulzer 2.5A double oven oscillator that was full of the GE Nicads from about 1960. GE was big in battery research in the late 50's, early 60's. I don't recall the exact order, but there is a big connection between GE, Gould, and GATES batteries. ... both Nicads and SLA's. -Chuck Harris J. L. Trantham wrote: Chuck, Do you mean 'commercialize the cylindrical sealed LEAD cells'? The cylindrical cells in the 6 V battery that powers the HP 5315A is a Gates IIRC. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Chuck Harris Sent: Tuesday, September 10, 2013 9:53 AM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] Fluke 735C - Information Needed As I recall, GE was first to commercialize the cylindrical sealed Nicad cells. They spun off their battery division to Gould, then to GATES... or some such memory muddled permutation like that... -Chuck Harris ___ 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] Fluke 735C - Information Needed
Chuck, Do you mean 'commercialize the cylindrical sealed LEAD cells'? The cylindrical cells in the 6 V battery that powers the HP 5315A is a Gates IIRC. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Chuck Harris Sent: Tuesday, September 10, 2013 9:53 AM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] Fluke 735C - Information Needed As I recall, GE was first to commercialize the cylindrical sealed Nicad cells. They spun off their battery division to Gould, then to GATES... or some such memory muddled permutation like that... -Chuck Harris gandal...@aol.com wrote: > Ah well, I think that probably settles it then:-) > > > In a message dated 10/09/2013 15:17:16 GMT Daylight Time, > jlt...@att.net > writes: > > Nigel, > > All help appreciated. I never knew about SLA batteries in a 1/2 D > size looking like NiCd's. I have seen 'packaged' cylindrical SLA's > as used in the battery option HP 5315A but they are much bigger than a 'D' cell. > > The cells certainly look like NiCd based on the 'corrosion' and 'exudate' > they produced. I have never seen an SLA do that. > > In addition, they clearly say 'RECHARGEABLE NICKEL-CADMIUM BATTERY' > in all caps, bold letters next to the 'GE' trademark. > > Thanks again. > > Joe > ___ 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] Fluke 735C - Information Needed
Joe wrote: I found 1.2 V 2.5 AH 1/2 D cells for $5.50 ea. On the internet. I would like to find a cheaper source since I need 20 of them, enough for two packs, one pack on each side of the Battery PCB. Available NiCds exhibit a huge range of quality. Also, series strings last much better if the cells are matched for capacity and leakage. The best results I've ever had with NiCds are with packs made up by SR Batteries (www.srbatteries.com/). He carries extremely high quality cells and matches them for series packs. I doubt his prices are the lowest, but you will not find better, longer-lasting packs than his. Usual disclaimers. Finally, you do NOT want to solder to NiCD cells -- welded tabs only. I did a study for a client some years ago, which showed that soldering, even very quickly and carefully, had disastrous effects on NiCd battery life. I wonder what would be better, SLA or NiCd's? The NiCd's had 'spewed' and corroded the PCB a bit but I have that cleaned up. I have seen SLA's (in UPS's) 'shrivel' and get very hot as they die. The charging protocols are very different, so you are committed to what was there before unless you re-engineer the charging system. Since even a repair to the 732A charging circuit, which is then adjusted to specification according to the manual, throws the unit out of calibration, changing the battery type and re-engineering a charger could have unfortunate effects on the standard's stability. For practical purposes, you are probably committed to the NiCds that were there unless you are willing to install SLAs and clone the 732A charging circuit. Best regards, Charles ___ 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] Fluke 735C - Information Needed
Yeah but watch out for the ebay Chinese nicads. You might test a few samples before investing much in them. I have some 4/5 C cells that are marked 2500 maH but test out at 1300 maH. Tom - Original Message - From: "Robert Atkinson" To: "Discussion of precise voltage measurement" Sent: Tuesday, September 10, 2013 2:21 PM Subject: Re: [volt-nuts] Fluke 735C - Information Needed Hi, Cell capacities have gone up. I'd buy four six cell (7.2V) 2500mAH model RC battery packs and break up as required. Smaller cells much cheaper and tags already welded. Robert G8RPI. From: J. L. Trantham To: 'Discussion of precise voltage measurement' Sent: Tuesday, 10 September 2013, 13:40 Subject: Re: [volt-nuts] Fluke 735C - Information Needed Charles, The NiCd pack (of five 'units', side by side, with each 'unit' being two 1/2 D cells stacked on top of each other) is 12 V 2.2 AH, GE Cat. No. JF 479147 8249. I suspect the '8249' is a date code and they look original. The Cal date was also Feb 82. I found 1.2 V 2.5 AH 1/2 D cells for $5.50 ea. On the internet. I would like to find a cheaper source since I need 20 of them, enough for two packs, one pack on each side of the Battery PCB. I'll also need some 'thin' heat shrink tubing to go around the 2 cell 'units'. I could also use some 'spare' 1/2 D cells for the battery packs in my 5061A's and B's. I wonder what would be better, SLA or NiCd's? The NiCd's had 'spewed' and corroded the PCB a bit but I have that cleaned up. I have seen SLA's (in UPS's) 'shrivel' and get very hot as they die. I'll have to take a look at the 732A manual to see what it's battery construction looks like. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Charles Steinmetz Sent: Monday, September 09, 2013 11:10 PM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] Fluke 735C - Information Needed Joe wrote: I need to fabricate a couple of 12 V NiCd battery packs using 1/2 D cells Does it have NiCds now? If so, do they look original? The 732A uses SLA batteries (originally 4x 6v, but most folks replace them with 2x 12v). If it has SLAs or gel cells (or originally did), you should replace them with the same so the charger works properly. Best regards, Charles ___ 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.
Re: [volt-nuts] Fluke 735C - Information Needed
Hi, Cell capacities have gone up. I'd buy four six cell (7.2V) 2500mAH model RC battery packs and break up as required. Smaller cells much cheaper and tags already welded. Robert G8RPI. From: J. L. Trantham To: 'Discussion of precise voltage measurement' Sent: Tuesday, 10 September 2013, 13:40 Subject: Re: [volt-nuts] Fluke 735C - Information Needed Charles, The NiCd pack (of five 'units', side by side, with each 'unit' being two 1/2 D cells stacked on top of each other) is 12 V 2.2 AH, GE Cat. No. JF 479147 8249. I suspect the '8249' is a date code and they look original. The Cal date was also Feb 82. I found 1.2 V 2.5 AH 1/2 D cells for $5.50 ea. On the internet. I would like to find a cheaper source since I need 20 of them, enough for two packs, one pack on each side of the Battery PCB. I'll also need some 'thin' heat shrink tubing to go around the 2 cell 'units'. I could also use some 'spare' 1/2 D cells for the battery packs in my 5061A's and B's. I wonder what would be better, SLA or NiCd's? The NiCd's had 'spewed' and corroded the PCB a bit but I have that cleaned up. I have seen SLA's (in UPS's) 'shrivel' and get very hot as they die. I'll have to take a look at the 732A manual to see what it's battery construction looks like. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Charles Steinmetz Sent: Monday, September 09, 2013 11:10 PM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] Fluke 735C - Information Needed Joe wrote: >I need to fabricate a couple of 12 V NiCd battery packs using 1/2 D >cells Does it have NiCds now? If so, do they look original? The 732A uses SLA batteries (originally 4x 6v, but most folks replace them with 2x 12v). If it has SLAs or gel cells (or originally did), you should replace them with the same so the charger works properly. Best regards, Charles ___ 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.
Re: [volt-nuts] Fluke 735C - Information Needed
>I posted this on the 6th and it appeared. >It was answered once and I responded. ... >I have a heavy couple of weeks coming up so it will >likely be late September or early October before >I get a chance to further investigate. I guess you are not the only one who is busy at work. That could explain the slow answering. And I already told pretty much all I know... The 735 prototypes were some sort of "missing link" between the 731B and the 732A. The project probably started as a "temperature stabilized 731B" and the reference circuitry of the C version was quite close to the commercial 732A. >Do you have any 'specifications' or other documents about it? I think the 735 series was an R&D project rather than a commercial product. Someone who worked for Fluke could have something. >The 'TH' resistance read about 8000 ohms (IIRC) and slowly >came down as the unit 'warmed up'. This AM it is about 3330 ohms. >I'd love to know what the 'normal value' of this is at operating temperature. 3300 ohms => 50 - 55 C oven temperature. The actual value is not important, if the resistance is stable the oven works as it should. >The NiCd pack (of five 'units', side by side, with each 'unit' being >two 1/2 D cells stacked on top of each other) is 12 V 2.2 AH The charger circuitry could be closer to the 731B than the 732A... ___ 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] Fluke 735C - Information Needed
As I recall, GE was first to commercialize the cylindrical sealed Nicad cells. They spun off their battery division to Gould, then to GATES... or some such memory muddled permutation like that... -Chuck Harris gandal...@aol.com wrote: Ah well, I think that probably settles it then:-) In a message dated 10/09/2013 15:17:16 GMT Daylight Time, jlt...@att.net writes: Nigel, All help appreciated. I never knew about SLA batteries in a 1/2 D size looking like NiCd's. I have seen 'packaged' cylindrical SLA's as used in the battery option HP 5315A but they are much bigger than a 'D' cell. The cells certainly look like NiCd based on the 'corrosion' and 'exudate' they produced. I have never seen an SLA do that. In addition, they clearly say 'RECHARGEABLE NICKEL-CADMIUM BATTERY' in all caps, bold letters next to the 'GE' trademark. Thanks again. Joe ___ 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] Fluke 735C - Information Needed
Ah well, I think that probably settles it then:-) In a message dated 10/09/2013 15:17:16 GMT Daylight Time, jlt...@att.net writes: Nigel, All help appreciated. I never knew about SLA batteries in a 1/2 D size looking like NiCd's. I have seen 'packaged' cylindrical SLA's as used in the battery option HP 5315A but they are much bigger than a 'D' cell. The cells certainly look like NiCd based on the 'corrosion' and 'exudate' they produced. I have never seen an SLA do that. In addition, they clearly say 'RECHARGEABLE NICKEL-CADMIUM BATTERY' in all caps, bold letters next to the 'GE' trademark. Thanks again. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of gandal...@aol.com Sent: Tuesday, September 10, 2013 8:54 AM To: volt-nuts@febo.com Subject: Re: [volt-nuts] Fluke 735C - Information Needed Not wanting to labour the point, but just to be sure as I don't recognise that part number, in the 80s GE did make cylindrical sealed lead acid cells under the brand name "Cyclon" and these looked very similar to Ni-Cads. If the cells themselves aren't clearly marked one obvious check is the charging circuit, basically constant voltage for lead acid and constant currrent for Ni-Cad. Regards Nigel GM8PZR In a message dated 10/09/2013 13:42:27 GMT Daylight Time, jlt...@att.net writes: Charles, The NiCd pack (of five 'units', side by side, with each 'unit' being two 1/2 D cells stacked on top of each other) is 12 V 2.2 AH, GE Cat. No. JF 479147 8249. I suspect the '8249' is a date code and they look original. The Cal date was also Feb 82. I found 1.2 V 2.5 AH 1/2 D cells for $5.50 ea. On the internet. I would like to find a cheaper source since I need 20 of them, enough for two packs, one pack on each side of the Battery PCB. I'll also need some 'thin' heat shrink tubing to go around the 2 cell 'units'. I could also use some 'spare' 1/2 D cells for the battery packs in my 5061A's and B's. I wonder what would be better, SLA or NiCd's? The NiCd's had 'spewed' and corroded the PCB a bit but I have that cleaned up. I have seen SLA's (in UPS's) 'shrivel' and get very hot as they die. I'll have to take a look at the 732A manual to see what it's battery construction looks like. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Charles Steinmetz Sent: Monday, September 09, 2013 11:10 PM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] Fluke 735C - Information Needed Joe wrote: >I need to fabricate a couple of 12 V NiCd battery packs using 1/2 D >cells Does it have NiCds now? If so, do they look original? The 732A uses SLA batteries (originally 4x 6v, but most folks replace them with 2x 12v). If it has SLAs or gel cells (or originally did), you should replace them with the same so the charger works properly. Best regards, Charles ___ 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.
Re: [volt-nuts] Fluke 735C - Information Needed
Nigel, All help appreciated. I never knew about SLA batteries in a 1/2 D size looking like NiCd's. I have seen 'packaged' cylindrical SLA's as used in the battery option HP 5315A but they are much bigger than a 'D' cell. The cells certainly look like NiCd based on the 'corrosion' and 'exudate' they produced. I have never seen an SLA do that. In addition, they clearly say 'RECHARGEABLE NICKEL-CADMIUM BATTERY' in all caps, bold letters next to the 'GE' trademark. Thanks again. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of gandal...@aol.com Sent: Tuesday, September 10, 2013 8:54 AM To: volt-nuts@febo.com Subject: Re: [volt-nuts] Fluke 735C - Information Needed Not wanting to labour the point, but just to be sure as I don't recognise that part number, in the 80s GE did make cylindrical sealed lead acid cells under the brand name "Cyclon" and these looked very similar to Ni-Cads. If the cells themselves aren't clearly marked one obvious check is the charging circuit, basically constant voltage for lead acid and constant currrent for Ni-Cad. Regards Nigel GM8PZR In a message dated 10/09/2013 13:42:27 GMT Daylight Time, jlt...@att.net writes: Charles, The NiCd pack (of five 'units', side by side, with each 'unit' being two 1/2 D cells stacked on top of each other) is 12 V 2.2 AH, GE Cat. No. JF 479147 8249. I suspect the '8249' is a date code and they look original. The Cal date was also Feb 82. I found 1.2 V 2.5 AH 1/2 D cells for $5.50 ea. On the internet. I would like to find a cheaper source since I need 20 of them, enough for two packs, one pack on each side of the Battery PCB. I'll also need some 'thin' heat shrink tubing to go around the 2 cell 'units'. I could also use some 'spare' 1/2 D cells for the battery packs in my 5061A's and B's. I wonder what would be better, SLA or NiCd's? The NiCd's had 'spewed' and corroded the PCB a bit but I have that cleaned up. I have seen SLA's (in UPS's) 'shrivel' and get very hot as they die. I'll have to take a look at the 732A manual to see what it's battery construction looks like. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Charles Steinmetz Sent: Monday, September 09, 2013 11:10 PM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] Fluke 735C - Information Needed Joe wrote: >I need to fabricate a couple of 12 V NiCd battery packs using 1/2 D >cells Does it have NiCds now? If so, do they look original? The 732A uses SLA batteries (originally 4x 6v, but most folks replace them with 2x 12v). If it has SLAs or gel cells (or originally did), you should replace them with the same so the charger works properly. Best regards, Charles ___ 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.
Re: [volt-nuts] Fluke 735C - Information Needed
Not wanting to labour the point, but just to be sure as I don't recognise that part number, in the 80s GE did make cylindrical sealed lead acid cells under the brand name "Cyclon" and these looked very similar to Ni-Cads. If the cells themselves aren't clearly marked one obvious check is the charging circuit, basically constant voltage for lead acid and constant currrent for Ni-Cad. Regards Nigel GM8PZR In a message dated 10/09/2013 13:42:27 GMT Daylight Time, jlt...@att.net writes: Charles, The NiCd pack (of five 'units', side by side, with each 'unit' being two 1/2 D cells stacked on top of each other) is 12 V 2.2 AH, GE Cat. No. JF 479147 8249. I suspect the '8249' is a date code and they look original. The Cal date was also Feb 82. I found 1.2 V 2.5 AH 1/2 D cells for $5.50 ea. On the internet. I would like to find a cheaper source since I need 20 of them, enough for two packs, one pack on each side of the Battery PCB. I'll also need some 'thin' heat shrink tubing to go around the 2 cell 'units'. I could also use some 'spare' 1/2 D cells for the battery packs in my 5061A's and B's. I wonder what would be better, SLA or NiCd's? The NiCd's had 'spewed' and corroded the PCB a bit but I have that cleaned up. I have seen SLA's (in UPS's) 'shrivel' and get very hot as they die. I'll have to take a look at the 732A manual to see what it's battery construction looks like. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Charles Steinmetz Sent: Monday, September 09, 2013 11:10 PM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] Fluke 735C - Information Needed Joe wrote: >I need to fabricate a couple of 12 V NiCd battery packs using 1/2 D >cells Does it have NiCds now? If so, do they look original? The 732A uses SLA batteries (originally 4x 6v, but most folks replace them with 2x 12v). If it has SLAs or gel cells (or originally did), you should replace them with the same so the charger works properly. Best regards, Charles ___ 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.
Re: [volt-nuts] Fluke 735C - Information Needed
Charles, The NiCd pack (of five 'units', side by side, with each 'unit' being two 1/2 D cells stacked on top of each other) is 12 V 2.2 AH, GE Cat. No. JF 479147 8249. I suspect the '8249' is a date code and they look original. The Cal date was also Feb 82. I found 1.2 V 2.5 AH 1/2 D cells for $5.50 ea. On the internet. I would like to find a cheaper source since I need 20 of them, enough for two packs, one pack on each side of the Battery PCB. I'll also need some 'thin' heat shrink tubing to go around the 2 cell 'units'. I could also use some 'spare' 1/2 D cells for the battery packs in my 5061A's and B's. I wonder what would be better, SLA or NiCd's? The NiCd's had 'spewed' and corroded the PCB a bit but I have that cleaned up. I have seen SLA's (in UPS's) 'shrivel' and get very hot as they die. I'll have to take a look at the 732A manual to see what it's battery construction looks like. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Charles Steinmetz Sent: Monday, September 09, 2013 11:10 PM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] Fluke 735C - Information Needed Joe wrote: >I need to fabricate a couple of 12 V NiCd battery packs using 1/2 D >cells Does it have NiCds now? If so, do they look original? The 732A uses SLA batteries (originally 4x 6v, but most folks replace them with 2x 12v). If it has SLAs or gel cells (or originally did), you should replace them with the same so the charger works properly. Best regards, Charles ___ 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.
