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Yes, that was my mis-understanding of what was written. Sorry. Yes. I should probably plot that on a log scale to get a better idea of how little/radiation is at 900 nm. The more I think a

Thank you very much, George. Thanks to you, I now have the 1927 edition of the Admiralty Handbook (archive.org has it, as well as volume 1 of the 1938 edition). And thanks to this thread, I have

I think the basic RF connection would be very simple. I often make fairly well matched 50 ohm loads by connecting 2 100 ohm chip resistors from a BNC center pin to ground connections (radial and

That sounds good. How would you do the RF load connection to coax to not have reflections? What is the "mount package" like? S

The page posted by BH1BPG may be of interest. Limited frequency range but useful for many. https://sites.google.com/site/linuxdigitallab/rf-homebrew-instrument/thermistor-rf-power-meter

Mike, The HP 8640B was a very nice sig gen in its day, but it's older than half the people on the planet. The high end of the HP 8640B is about 1000 MHz with the extended frequency option, so it's

Jim, your mention of the HP 8640B made me curious about the SSB phase noise specs of the AD9166 system. At 100 MHz it appears to be equivalent to that of the 8640B, but I couldn't find a spec for the

I'm a bit confused. He said RMS, not RMS power. Isn't "RMS power" a meaningless term? Voltage and current can be RMS, and the end result is precisely what you say, the same heating (work) as DC would

I'd like to suggest another option. I have some Platinum RTD temperature sensors bought for another project. They are very stable and accurate as temperature sensors and relatively cheap. They are

Those bolometer chips work from well below zero (C or F) to a few hundred. Getting the environment for the sensing element to be consistent and stable over the measurement period is always going to be

I think the measured amperage would be RMS, by virtue of measuring the temperature of the resistor. Guided by the title of thread, was only referring to current. Interesting calculator for temperature

One technique , I think it was an HP RF power meter. Used a thermistor in a bridge configuration, which had a bias supply to set the thermistor to a particular resistance. When the RF was applied, it

I am personally interested in doing this in a low impedance circuit. That probably means having a transformer with a single turn on the secondary. A bit of nichrome wire as the secondary would be

I happen to have a 1931 copy of The Admiralty Handbook of Wireless Telegraphy, a great tome for its day. It speaks of capacitance in jars. I also have a 1927 copy of "Les Ondes Electriques Courtes"

Hmm, one issue with the eval board is -- the dox for the eval board show it being used with a Raspberry Pi 4 board, which is nearly as much unobtainium as the USD$599 that the eval board costs, and

This will be very interesting to find out at what point the temperature of the wire gets to the point that it can be detected by a near infrared diode. Definitely has a possibility of being good low

I had a look at the AD9166 when it was released, but the price for just the chip was off-putting. Current 10-off cost from Mouser UK just for the 9166 chip seems to be ?639 + tax.

This not exactly pocket money at $599 https://www.analog.com/en/design-center/reference-designs/circuits-from-the-lab/CN0511.html But the evaluation board could form the basis of a low cost signal

I would not expect it to be necessary for the bult to be visible to the human eye before an IR photodiode could detect it. But

Hello, I recently built such a LISN unit. You can find a brief description here: http://www.dd1us.de/Downloads/Netznachbildung%20mit%20Regel-%20und%20Trenntrafo%201v0.pdf Sorry, it is presently only