Electronics > Metrology

Budget 10V (etc.) Voltage References/Standards on the marketplaces out there

(1/8) > >>

Rax:
Hi all,
I wonder if anyone has tried, and has some measurements, results, thoughts on some of these voltage standards on the various marketplaces out there. They seem to go for somewhere between $140 - $210 (USD), and most are adjusted against your typical 3458A, maybe nulled against a Fluke standard, etc.
Is there any one that is particularly good?

Some are 2W, others 4W, and there are other functionality and features differences.

Some of the sellers are zildjianboy7, kaysert, etc.

bdunham7:
https://voltagestandard.com/001%25-10v-reference

I have one of Doug's earlier versions, back when he only guaranteed 24ppm, had an open-chassis w/ solder turrets for terminals and was just starting to add the extra diode temperature compensation.  It has been excellent, very stable and a better temp coefficient by far than my Fluke 731.  I can highly recommend the voltagestandard.com for both product and service.  This latest model looks even better than before--although the price has gone up a bit, I think it is pretty cheap for what it is and what is included now.  They also actually send their 3458A to Keysight's primary standards lab for calibration--some of the competitors are using more questionable references.  That may not seem to matter much in the 10-ppm class, but mine has been way better than advertised. 

guenthert:
   I got one of fredchu's (seller's name on eBay) LT1021 based 10V references [1] (meanwhile he also offers LM399 based ones) almost a year ago.  Works like a charm afaict.  Unfortunately a good chunk of my gear is still in storage, so I can't sensibly characterize it. 

   I like that it has screw/banana-plug combination terminals.  They are gold color (gold flashed?), not sure if they are truly low thermal EMF terminals though (there is no claim that they would be).  Oddly, the same kind is used for input and output (clearly marked though, albeit with sticky labels -- it's not meant to be used in decades like old -hp- gear).

   I also like that he publishes pictures of the internal construction.  Removes the mystery and temptation to open one up oneself (and potentially invalidating calibration).

EDIT:  with the recent addition of a 50+ y/o -hp- 735A DCV transfer standard, I'm now in a better position to evaluate the LT1021 based 10V voltage reference (fortunately I already had a DV211 "dekavider" KVD).  Still can't say much about long-term stability, but at least the short term stability / [absence of] noise was good enough to verify the power-on behavior (limit of hysteresis) of the -hp- 735A (see attached, the green line being the differential voltage between those sources).
 
[1] https://www.ebay.com/itm/133639951608?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D245488%26meid%3D740e89ab81a9416ea9d79e5598cc60b2%26pid%3D101195%26rk%3D2%26rkt%3D12%26sd%3D134257761418%26itm%3D133639951608%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DSimplAMLv11WebTrimmedV3MskuWithRevOptLambda85KnnRecallV1WithCassiniImageSim%26brand%3DUnbranded&_trksid=p2047675.c101195.m1851&amdata=cksum%3A133639951608740e89ab81a9416ea9d79e5598cc60b2%7Cenc%3AAQAHAAABMBTnULwZvkwwvWb54Sp3TESux6kFTXxeByyFeTbBEJTAHELVvJ%252BnpiRCZsaEJO6SgqSsQIHvbg9YL2jxELBYJZWPAuIRQj6%252FC29lmsqlxuBAp5GZml%252B6FjHNFCmsArHfMC4jQ3nozzbfp%252BfjnKt%252FtKzCUl3FiGFoFWL2nZyg4EmAmpHfYbAOSWUQ9qzNLM8oaLQ8yWPqw97HEa%252FdNBNVmdQuwcxRJ9lwFup6fJ9Y4BPJa1kejiwmYKyv0fAT5MjN1e0IZVJALwW9dsRwfB02OlEzva9%252BQCzLKi0YUJIf3oOU9KTyFSbgw2WZHqIJUbhf%252BvfZlgQYlFV86ktKC5yLpJ4wVlVe45z0%252FApZMOFJH5wPJYQEShj9MZ4CSNtN6LSauespCDm%252FBxetQUasnyYKYIo%253D%7Campid%3APL_CLK%7Cclp%3A2047675

ScoobyDoo:
You can read more about adventures of "Awesome14 (Kaysert - Tom Kayser)" here:

Calibratory D-105 DC Precision Voltage Reference Standard
https://www.eevblog.com/forum/metrology/calibratory-d-105-dc-precision-voltage-reference-standard/
Search for the teardown EEVBLOG members have done on Awesome14 artwork - be careful

Best regards
ScoobyDoo


kaysert
https://www.grelly.com/itm/10-volt-10-v-dc-prec-voltage-reference-standard-nulled-to-fluke-732a-or-732b-251756273626

We know from past that Kaysert = Tom Kayser = Awesome14

RoadDog:

--- Quote from: ScoobyDoo on January 25, 2023, 06:49:58 pm ---You can read more about adventures of "Awesome14 (Kaysert - Tom Kayser)" here:

Calibratory D-105 DC Precision Voltage Reference Standard
https://www.eevblog.com/forum/metrology/calibratory-d-105-dc-precision-voltage-reference-standard/
Search for the teardown EEVBLOG members have done on Awesome14 artwork - be careful

Best regards
ScoobyDoo

--- End quote ---

Oh man that thread is gold. I had to force myself to stop reading because I have to get back to work but what a piece of work that guy is. I can’t wait to read more of his replies this evening 😂

Navigation

[0] Message Index

[#] Next page