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Frank, Very useful feedback. I think going P-to-P (instead of PCB) with this makes a lot of sense. Makes the project go faster too! I was thinking about Z201 resistors - why doesn't anyone seem to use

Hello, This is my design for a 10k reference resistor. It's based on a 9k9990 VHP202Z, plus a Thin Film resistor as a fixed trim. But I would recommend a 10k VHP101 instead. It's sitting in a aluminum

Well, in the past there was only one reasonable 10V voltage reference from Joe Geller, the SVR-T. It was very stable over time, temperature and humidity and could be used as a starting reference point

I have an ESI 8 1/2 digit ohm meter. I measured my Leeds & Northrup 10K reference on a freshly calibrated 3458. Get Outlook for Android<https://aka.ms/AAb9ysg>

Typo, obviously "you need a calibration". Not an intervention ?

There is another option if the goal is to make a presicion 1/2 voltage divider or *2 multiplier. Rather than selecting and matching 0.005% bulk metal foil resistors (which cost ~$5.00 each), one can

Jeff, Interestingly, this reminds me I have an MAX6225ACPA little kit I put together some years ago for purposes such as this. I also placed a resistive divider on there to add an 185mV output... The

I was also thinking of making a resistance "standard" for myself that would help calibrate my impedance analyzer (that I posted to this group in the past). The main reasons I want to make my own is to

I think such a project would be useful for your typical "highly invested" hobbyists like me, for which I think a 6.5 digit DMM is pretty normative. In my case, my workhorse is a Fluke 8840A (5.5), and

wrote: What use are you going to put this to? You really need to think about what uncerties you can tolerate. Is it for che

Hi all, I thought this may be worth its own thread. Definitely spun off of a "WTB" post which has its purpose, but an alternate approach would be to build something at DIY level and expected

You need a JVS: https://en.wikipedia.org/wiki/Josephson_voltage_standard -- Prof. Thomas H. Lee Allen Ctr., Rm. 205 420 Via Palou Mall Stanford University Stanford, CA 94305-4070

wrote: I think you need a celebration.

Huh? Don’t know anything about that… Sent: Wednesday, December 14, 2022 9:31 AM To: [email protected] Subject: Re: [Test Equipment Design & Construction] Precision

No, BBC Radio 4 actually… ? Sent: 14 December 2022 16:25 To: [email protected] Subject: Re: [Test Equipment Design & Construction] Precision Voltage Reference Hmmm….

Hmmm…. Dilbert right? What would Dilbert think are the necessary precision Nail characteristics to revise the new Power Supply design anyway? Would he consider that he needs a higher precision Nail?

Not going for anything with precision then.... ???Ho Ho, Merry Christmas. Sent from my iPad by banging a nail into a piece of wood...

I am not in denial...?? I can quit calibrating equipment any time I want.???????? I just don't want to right now... ...and don't worry about sending me any nice precision resistor, just a

It's not, he's in denial. We should probably get him a nice precision resistor. Vince - K8ZW. -- Michigan VHF Corporation -- nobucks dot net https://www.nobucksboutique.com

I didn't realise recovering was even possible !