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Before I retired federal civil service (Naval Station Norfolk) 2 years ago, I found out that there were none of the NEETS series issued in print anymore, and I also attempted to go to Langley AFB to

Hi, AFSC Design Handbook 1-4 Electromagnetic Compatibility - among others was a good starting point for EMI. Ross From: [email protected]

Hi Morris, I'm not exactly sure what core I'm using, since it was an unknown junk box item. After some measurements and using it for the project, I got more figured out and surmised that it's nearly

I neer saw the manuals for my MOS I tested out of the electronics school, while still in Basic, at Ft. Knox. wrote:

Good stuff. I have turned on a dozen techs to this. Now if could find USAF training manuals. I stupidly left them in a closet when moving. About 7 foot wide stack. Get Outlook for

Hi Ed, This is a very interesting topic and thanks very much for posting details of your experiences. I was wondering what you used for a core? I am trying to make an exciter for my Marconi Q meter

Ed Thank you for putting up the pictures. It's interesting to see how others have solved the transformer problem. I put up my pictures a few weeks ago when all the Activity on Q meter design was being

I put up some pictures of the transformer assembly innards. The planned tight winding and mounting of a fairly big toroid worked out nicely. I found in the junk dept a brass gear piece that could be

The following photos have been uploaded to the Ed's Q meter transformer ( /g/Test-Equipment-Design-Construction/album?id=283881 ) album of the

Ed Breya <edbreya@...> added the album Ed's Q meter transformer ( /g/Test-Equipment-Design-Construction/album?id=283881 ) : first round build

Hi, I did further simulations and calculations on the idea of measuring the voltage ratio of the Q meter voltmeter voltage TO the source voltage, to eliminate the source voltage variations. I found

Hi Arie, very good point. Indeed I have built also a limiter circuit with a BNC jack and a plug. I simply plug this onto the BNC port of the LISN to protect the test equipment. I guess I should add

Hi Matthias, A nice design and well build. I have used equipment like this professionally and one item that I added are clamping circuits over the output to the spectrum analyzer. The input of that

Hi Jeff, thank you very much for your advice. I generated an English version which can now be downloaded here:

Hello all, This DC-LISN ( WURTH design) is only for DC but works very well. https://www.elektor.com/elektor-dual-dc-lisn-150-khz-200-mhz Jan ON4MMW Sent: Monday, January 30, 2023 12:30 PM To:

Chiao Claudio, I have built something similar also based on Thilo’s inputs and it is very helpful: http://www.dd1us.de/Downloads/Netznachbildung%20mit%20Regel-%20und%20Trenntrafo%201v0.pdf Sorry it

not exactly a "professional" equipment but good enough for our amatorial purposes: https://www.youtube.com/watch?v=o8zMhjXcmoA best 73 de i2NDT Claudio

Check out my LISN design. It includes a wideband current probe that CORRECTLY measures common-mode EMI, something that has never been properly addressed in the measurement standards. They all ignore

Hi Morris, For the amplifier you might consider an amplifier from Mini-circuits, such as: ZHL-32A? (P1dB=+29 dBm),? 50 KHz to 130 MHz, 25 dB gain? or ZHL-3A? (P1dB=+29.5 dBm),? 400 KHz to 150

wrote: Interesting. What's the spectrum ? Is it the switching converter or the rectification ? Big Clive recently did a teardown of an LED bulb with no switcher :