Hi Tony
Absolute Calibration in the UK charged 144UKP+VAT to measure a SR104. This
included pickup and dropoff using their own vehicle!
Their stated capability is to +/- 0.24ppm
Very happy with them so far, they can also do zener measurements, e.g 10V to
within 0.23ppm, for similar price.
Joh
On 11/08/2015 17:53, Richard Moore wrote:
True of any resistor that you want to trust to better than 10ppm, including the
Vishays.
Of course, but Dr Frank's experience with the oil filled Vishay foils
has been good - from another eevblog post:
'Only the hermetically sealed, oil filled types (
True of any resistor that you want to trust to better than 10ppm, including the
Vishays.
> On Aug 11, 2015, at 9:00 AM, volt-nuts-requ...@febo.com wrote:
>
> Edwin Pettis states his resistors drift is typically better than 2ppm in
> the first year, so pretty good but you'd still need to have th
On 06/08/2015 16:25, David C. Partridge wrote:
> Looking for a set of precision resistors for calibration purposes.
>
> The crucial factor isn't that they be *exactly* the values above, so
I don't necessarily need 0.001% parts. Low TCR is important, and I will
need to know that actual values to
Seems like a work for a small cpld...
Em 07/08/2015 03:53, "Mark Sims" escreveu:
> One thing to watch out for on the 5450A is burned out segments in the
> 14-segment LED displays. The display chip they used is rather weird (each
> 14 segment digit is actually two 7-segment displays mixed togethe
Sounds like a plan :)
Regards,
David Partridge
-Original Message-
From: volt-nuts [mailto:volt-nuts-boun...@febo.com] On Behalf Of Four Designs
Company
Sent: 06 August 2015 18:36
To: volt-nuts@febo.com
Subject: Re: [volt-nuts] Precision Resistors
You could acquire a Fluke 5450A
One thing to watch out for on the 5450A is burned out segments in the
14-segment LED displays. The display chip they used is rather weird (each 14
segment digit is actually two 7-segment displays mixed together) and VERY
unobtainium. Mine has a missing segment on one of the digits and I have
> Message: 1
> > Date: Thu, 6 Aug 2015 16:25:54 +0100
> > From: "David C. Partridge"
> > To: "'Discussion of precise voltage measurement'"
> > Subject: [volt-nuts] Precision resistors
> > Message-ID: <5D9EFA13BAB94DCA901607C1EDEA49
...@q.com
Dick Moore
> Message: 1
> Date: Thu, 6 Aug 2015 16:25:54 +0100
> From: "David C. Partridge"
> To: "'Discussion of precise voltage measurement'"
> Subject: [volt-nuts] Precision resistors
> Message-ID: <5D9EFA13BAB94DCA901607C1EDEA4911@APO
David,
Depending on the time frame needed for these resistors you can order many
(but not all) of the parts from Farnell. I believe the Rhopoint resistors
are the recommended brand. The high value resistors could be Caddock USF
series.
Another alternative would be to contact Edwin Pettis. He manu
-Digital-Calibrator-Free-Shipping-/261992687873?hash=item3cfffb2901
Regards,
Ludger
Gesendet: Donnerstag, 06. August 2015 um 17:25 Uhr
Von: "David C. Partridge"
An: "'Discussion of precise voltage measurement'"
Betreff: [volt-nuts] Precision resistors
Looking for a
Message: 1
Date: Thu, 6 Aug 2015 16:25:54 +0100
From: "David C. Partridge"
To: "'Discussion of precise voltage measurement'"
Subject: [volt-nuts] Precision resistors
Message-ID: <5D9EFA13BAB94DCA901607C1EDEA4911@APOLLO>
Content-Type: text/plain;
Looking for a set of precision resistors for calibration purposes.
I need the following values to calibrate the ohms ranges on my meters:
100
1k
2k
10k
20k
100k
200k
1M
2M
10M
20M
The crucial factor isn't tha
> Sent: Sunday, 18 August 2013 2:47 PM
> To: Discussion of precise voltage measurement
> Subject: Re: [volt-nuts] Precision resistors
>
> Raj and John,
>
> Thanks for the advice. I'll go with some mild dish detergent and water. The
> black, rectangular resistors are definitely
nt
Subject: Re: [volt-nuts] Precision resistors
Raj and John,
Thanks for the advice. I'll go with some mild dish detergent and water. The
black, rectangular resistors are definitely marked "Daven", just like all
the others.
The bobbins are marked .02%, 1/2 W. The black rectangles
Raj and John,
Thanks for the advice. I'll go with some mild dish detergent and water. The
black, rectangular resistors are definitely marked "Daven", just like all
the others.
The bobbins are marked .02%, 1/2 W. The black rectangles are .1% (no
wattage) and the micas are simply marked 85, which I
The red 'sealant' is Glyptal laquer. Probably safe to water wash.
I would not use any solvent on the bobbins.
The black encapsulates are likely Vishay, if they look like CK-05/6
ceramic caps. Alcohol should be safe for a quick rinse.
-John
=
> Nothing abrasive should be used. Soa
Nothing abrasive should be used. Soap and water and old toothbrush is what I
would try. Very high values avoid water!
I use a cheap ultrasonic clear for some things in the shack!
Raj
VU2ZAP
(former resistor manufacturer)
At 17-08-2013, you wrote:
>What is the recommended method for cleaning dirt
What is the recommended method for cleaning dirt, oil, etc from precision
resistors? I'm talking about a combination of wirewound on plastic bobbins,
wirewound on mica (and sealed with something) and an unknown type that is
encapsulated in black plastic rectangles. These are all 1950-1960 vintage
a
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