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I see a General Radio 0.01 pF 0.03% capacitor on eBay today https://www.ebay.co.uk/itm/193187716259 (image attached, as eBay links soon disappear). https://www.ietlabs.com/pdf/ Datasheets/1403.pdf (

<snip> That's Brooke Clarke, who is a member of this list. <snip>

Great document! I don't like the idea of taking a thermocouple from a working Q Meter however. An alternative would be taking one from a World War surplus RDF Ammeter. Back in the '60's, we were

I have used MATBAB/Octane a but, but it wasn’t clear to me that the NPL code could read a Touchstone file. That is okay in a test jig for small capacitor

Hello David, No need to apologise, you did reply. regards?? Ken g8beq

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I have the following: HP 3575A gain-phase meter HP K34-59991A phase comparator Tracor 527A & 527E frequency difference meters The 527’s are handy for fast convergence of a significantly

I haven't been following this thread too closely, so I apologize if this has already been discussed. That said, distortion in the source becomes increasingly important as one pursues ever greater

Hello all, You may have a look at my document on:? Calibration Techniques for the Home Lab http://ve2azx.net/technical/CalTechniquesfortheHomeLab-2-Compressed.pdf I have had good results with a full

Thanks for the NPL paper. My Q factor measurement technique is as simple as possible. It only requires amplitude ratios to be measured.? No angle measurement is required. Both series and shunt modes

The question was asked previously why the thermcouple heads in the Boonton Q Meters were so fragile and prone to burnout so easily. After looking around on the web, reviewing some old notes in my

Here are a couple more pages with info about ways to measure Q. Mikek * http://w7zoi.net/twofaces.pdf https://docplayer.net/39575747-Experiments-with-coils-and-q-measurement.html* Or the same on the

There is always the venerable HP745A./ (up to110KHz) /A Rube-Goldberg, if there ever was one./ /Quite accurate for an instrument 50+ years old. I have two, different vintages, and both quite close to

Another possibility below 1 MHz or so, would be a light bulb and light meter. Apply AC to the lightbulb and it will glow. The light meter indicates the illumination level. Then apply DC to the light

There's a 105 page paper from Andrew Gregory at NPL on this topic.

Hello All, Measuring the Q factor may be easily done with a VNA or a nanoVNA, for instance. The measurement set-up cannot be simpler: Connect the L and C in series and in shunt across a transmission

Okay. I set up what I had in mind at https://www.kirkbymicrowave.co.uk/LCR/ You can see the basic structure * Chose the instrument (HP 4284A or 8285A) * Set cable length, measurement type,

Hello, the quote from Wikipedia is correct in the theory, wrong in the practice. WebAssembly itself is but an ISA which is implemented in the browser. The magic takes place a logical layer above,

Unfortunately, in the world of EMC, where field strength measurements are our daily business, this antenna is not known for its accuracy. Indeed, its resonance frequency band is fuzzy and therefore

Hi Guys, One method of AC voltage measurement that is easy to build and calibrate is the shunt diode detector. With suitable components and layout, a frequency response up to the low GHz, flat to