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Sounds interesting. I have a few LM399s but not done the work to make a transfer standard. But it would be very good to get a UK cal group together, for both DC and the stuff Reg is talking about.

Hi Adrian, good to hear from you... especially as you are local. Maybe we need to start with a portable Voltage Standard. I made a 5 Volt ref in a box some time back but have not checked it's tempco

Chris, It is, but I'm in the US. Resistors are easy. It's the inductors and capacitors that are hard. However, an SMD string of capacitors which can be trimmed by hand by adding a capacitor in

Nice to see another UK user. I'm quite close to you, in Bedford. I have Keithley and HP 6 1/2 digit meters but well out of cal. I have an HP53310A which aiui will give FM modulation measurements

Hi Reg. I'm in. For a start, there are lots of 1ppm precision resistors here that could be put in boxes or indeed just left as they are. The 4 terminal ones are fairly large like Vishay VCS332 16R000

Is there any interest here in circulating a set of RF related references? The voltnuts on EEVblog are now in the 3rd round. A set of voltage references, resistors and a temperature and humidity logger

Not that is useful. The photos show the gadget. lsusb(1) reports: "ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter" and it shows up as a serial port on Debian. So there may be hope.

That part I guessed, but without a way to set the coefficients it's pretty useless.

Eric, Thanks. Tomorrow is a rainy day so I will test. 73, Mike N2MS

It has a cal chart built in to the firmware.

ROFL! I wanted to retire to a Spray type boat working on boats and marine radios. Too old now and stuck on land. My Field Day kit has: nanoVNA H4 4x tinySA LCR/Transistor tester diode noise source 2x

Trace/calc/max hold

Just in case anyone wonders why I have 4 tinySAs. Two for sources and two for the ports on a directional coupler will evaluate a mixer quite nicely. Thank you Erik! As for the gadget I bought, it

Erik, Fine. One last question. How do I set the trace to max hold? I'm amazed at the capabilities of these sets. When I was in college 45-50 years ago I used to repair marine radios. Much of the work

No, set to zero span and at the carrier frequency. The resolution filter should be maximum width This makes the tinysa a tuned power meter. Set the trace to max hold to measure peak power

Eric, I will test it. I assume the 5000 cycle burst is at a single frequency, similar to whistling into the microphone. To measure the peak power while I am speaking would I set the start and stop

Sorry, 1ms should be 0.1 ms

Here a 5000 cycle burst of 50 MHz (1 ms)

Erik, Good idea. Is the tinysa response fast enough to measure the peak power of a single sideband signal? Mike N2MS