[volt-nuts] Banana jack shorting straps

[Mark Sims]

Mine have 2 oz copper on each side and some via stitching between the sides.   
I am waiting for the prototypes from OSHPARK to determine if / where I can add 
additional vias without compromising the structural integrity by creating 
"break me here" fault paths.

I have a 4-way layout in the works (basically the same design with longer 
"legs" that will reach to the other pair of jacks.   Unlike the Fluke one, I 
don't have any solder mask on mine.  Different banana jacks have different 
sized contact disks and if you get the solder mask too close to the slot it can 
keep the jack from making contact to the copper / ENIG gold.

--

That said, the 8508A-7000K board has thick, wide traces on BOTH sides for the 
current and sense terminals and a smaller trace bridging sense to current
___
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] HP-3458A NVRAM

[Randy Evans]

Frank,

Thanks for the information.  I was hoping to hear from someone that had
actually successfully used the DS1220AD in the 3458A.  I did not understand
the comment about the "instrument of 'quarks'", but it may be in regards to
the second set of DS1230Y NVRAMs?  Did you change those out to DS1230AD
NVRAMS also?

Thanks,

Randy

On Sat, Nov 11, 2017 at 6:31 AM, Dr. Frank 
wrote:

> Hello Randy,
>
> I have replaced the CAL-nvRAM by a DS1220AD-150 in 2013, as the Y version
> was not available.
>
> The speed was not the problem, but a slightly different supply volatge
> range, if I remeber correctly.
>
> My 3458A works w/o any problem, as does the instruments of 'quarks', who
> got the 2nd nvRAM which I have ordered.
>
> Frank
>
> ___
> volt-nuts mailing list -- volt-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/m
> ailman/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] Fluke 853A

[george]

Hi All

Whilst trying to decide just what T kit keep I discovered a long forgotten 
Fluke 853A, does anyone know anything about this and is it worth its keep?

73 George G6HIG
___
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] Banana jack shorting straps

[Don@True-Cal]

For all of the instruments I referenced, including the Fluke 8508A by inference 
of the Fluke short model number, it is much more about controlling or 
minimizing Seebeck EMF. For the low end resistance ranges on these instruments, 
far greater error is introduced from thermal EMF than from the absolute trace 
resistance of the board. That said, the 8508A-7000K board has thick, wide 
traces on BOTH sides for the current and sense terminals and a smaller trace 
bridging sense to current. A more compelling test might be to measure and 
record sub-microvolts changes over time with air currents on the terminals. If 
this test was repeated using the solid copper S-shaped 4W short suggested for 
the 3458A calibration, I would guess that the solid wire might take more time 
to come to thermal equilibrium with the terminals. I may give it a try.
Don

-Original Message-
From: volt-nuts [mailto:volt-nuts-boun...@febo.com] On Behalf Of Jeremy Nichols
Sent: Saturday, November 11, 2017 12:52 PM
To: Discussion of precise voltage measurement 
Subject: Re: [volt-nuts] Banana jack shorting straps

It would be interesting to see results of a resistance measurement of some of 
these "shorts" using an appropriate low-resistance instrument.

Jeremy
N6WFO


On Sat, Nov 11, 2017 at 8:09 AM Don@True-Cal 
wrote:

> Mark,
> I would recommend duplicating the Fluke 8508A-7000K 4W Short 
> Calibration Board design. This board fits my 3458A & 3457A exactly and 
> drops in place nicely from the top after the binding posts are opened 
> sufficiently. I also have the banana plug style 2001-182-01B Cal Short 
> that fits my Keithley
> 2002
> (also 2000/01/15). I can provide hi-res pictures of either one and 
> provide measurements if needed. Both styles have Ag plating. See attachment 
> left.
> Don
>
> -Original Message-
> From: volt-nuts [mailto:volt-nuts-boun...@febo.com] On Behalf Of Mark 
> Sims
> Sent: Thursday, November 09, 2017 7:01 PM
> To: volt-nuts@febo.com
> Subject: [volt-nuts] Banana jack shorting straps
>
> Here's what they should look like...  dots are via stitching between 
> the top and bottom.
> ___
> 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.

--
Sent from my iPad 4.
___
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] Banana jack shorting straps

[Jeremy Nichols]

It would be interesting to see results of a resistance measurement of some
of these "shorts" using an appropriate low-resistance instrument.

Jeremy
N6WFO


On Sat, Nov 11, 2017 at 8:09 AM Don@True-Cal 
wrote:

> Mark,
> I would recommend duplicating the Fluke 8508A-7000K 4W Short Calibration
> Board design. This board fits my 3458A & 3457A exactly and drops in place
> nicely from the top after the binding posts are opened sufficiently. I also
> have the banana plug style 2001-182-01B Cal Short that fits my Keithley
> 2002
> (also 2000/01/15). I can provide hi-res pictures of either one and provide
> measurements if needed. Both styles have Ag plating. See attachment left.
> Don
>
> -Original Message-
> From: volt-nuts [mailto:volt-nuts-boun...@febo.com] On Behalf Of Mark Sims
> Sent: Thursday, November 09, 2017 7:01 PM
> To: volt-nuts@febo.com
> Subject: [volt-nuts] Banana jack shorting straps
>
> Here's what they should look like...  dots are via stitching between the
> top
> and bottom.
> ___
> 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.

-- 
Sent from my iPad 4.
___
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] Banana jack shorting straps

[Mark Sims]

If the two wire straps  work out, I will probably do a four wire short.  When I 
need I four wire short (which isn't very often), I usually just use a freshly 
stripped piece of copper wire.
___
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] Banana jack shorting straps

[Don@True-Cal]

Mark,
I would recommend duplicating the Fluke 8508A-7000K 4W Short Calibration
Board design. This board fits my 3458A & 3457A exactly and drops in place
nicely from the top after the binding posts are opened sufficiently. I also
have the banana plug style 2001-182-01B Cal Short that fits my Keithley 2002
(also 2000/01/15). I can provide hi-res pictures of either one and provide
measurements if needed. Both styles have Ag plating. See attachment left.
Don

-Original Message-
From: volt-nuts [mailto:volt-nuts-boun...@febo.com] On Behalf Of Mark Sims
Sent: Thursday, November 09, 2017 7:01 PM
To: volt-nuts@febo.com
Subject: [volt-nuts] Banana jack shorting straps

Here's what they should look like...  dots are via stitching between the top
and bottom.
___
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.