Hi Joe,

How about a picture or two on this item ? ? ?

I have never heard of it.  So, maybe Charles is right it was an internal
unit never intended to be sold, but used by Fluke's representatives or
internal cal labs.

Bill....WB6BNQ

J. L. Trantham wrote:

Bill and Charles,

I have not had a chance to compare my unit with the 732A manual yet.  My day
job keeps interfering with fun.

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 need to
fabricate a couple of 12 V NiCd battery packs using 1/2 D cells, finish the
'clean up', get everything back together then turn it on and see how it
settles out.

Then, I can spend some time 'twiddling' with it using a 3458A and 7081.

It looks to be quite the beast, size and weight wise, and would appear to be
as discussed, a Fluke item with a cal sticker from their 'Primary Standards
Lab'.

Joe

-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com] On
Behalf Of wb6bnq
Sent: Monday, September 09, 2013 9:30 PM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] Fluke 735C - Information Needed

Hi Joe,

How about a picture or two on this item ? ? ?

I have never heard of it.  So, maybe Charles is right it was an internal
unit never intended to be sold, but used by Fluke's representatives or
internal cal labs.

Bill....WB6BNQ

J. L. Trantham wrote:

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.

Joe wrote:

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

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-bounces@febo.com [mailto:volt-nuts-bounces@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:

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.

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 jltran@att.net
To: 'Discussion of precise voltage measurement' volt-nuts@febo.com
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-bounces@febo.com [mailto:volt-nuts-bounces@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:

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.

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" robert8rpi@yahoo.co.uk
To: "Discussion of precise voltage measurement" volt-nuts@febo.com
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 jltran@att.net
To: 'Discussion of precise voltage measurement' volt-nuts@febo.com
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-bounces@febo.com [mailto:volt-nuts-bounces@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:

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.

Joe wrote:

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.

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