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What ferrites and where's the reference for them. Jim K9YC has done some fairly extensive choke testing.http://k9yc.com/RXChokesTransformers.pdf Mike W9MDB

I having fits trying to measure lossy "soft" ferrites against the manufacturers curves. Over the range 1 to 300 MHz, I'm not even getting close, looking at either S11 into a short or S21. I've tried a

My guess, the ISEC folks but radar would be very appropriate for InfoAge & Camp Evans. A lot of work was done there from WWII until the 80's (maybe the 90's). The makerspace used to be called IXR -

Well, that would have not only magnetic coupling but considerable capacitive coupling also with the wire wrapped around the tower. The resonant frequency of the magnetic and capacitive coupling could

... So as to stay on the topic of Network Analyzers one piece of equipment Info-Age accepted was my General Radio 916 RF Bridge. Mike N2MS

InfoAge did accept my Radio and Electronic Data Books, Equipment Manuals and Electronic perodicals. I donated it in the spring of this year. The person I worked with is Ray Chase. Is business card

Not InfoAge but more likely The Vintage Computer Federation (VCF - museum) or NJARC (Antique Radio museum). I don't think we (Computer Deconstruction Lab - CDL - Makerspace) got them. InfoAge manages

In the 70's I worked at a transmitting station that had about 10 three wire 2 to 30 MHz "rhombic" field antennae fed with 600 ohm open wire feeders.On a whim one day I backed up my Celica fitted with

I don't know that you want to wrap the coils *around* the tower. You want them magnetically coupled - which is sort of challenging, since you'd normally have a magnetic core, the tower is "one turn",

Jim Allyn, I don't have a tower to test this idea. I read the Notes on measuring tower resonances that you posted where Rudy couples to the tower with a rectangular loop. What if a number of insulated

Hi Tom, Nice job. 73...Bob VK2ZRE

Thanks Stan, I won't be so impatient on start up.

It starts that way, and in some installations can take a very long time (two or three minutes or more the first time) as it unpacks and loads all of the necessary python environment (amd perhaps it

I would add to the question about saver. I only get a command line box when I download from nanoVNA saver to windows 11. Where can I find info about getting the program to work? Dave, AC0YW

Hugen, I replaced R93 with a short and that fixed the problem. Thank you, Tom? W0IVJ

Thanks, Hugen, Attached are two pictures of the area.? The board that does not write has a lot more circuitry around the SD card slot than the board that does write.? Should I just place a ferrite

I updated. It works, Thanks

Charlie, all versions of nanovna-saver (that I am aware of) can show a Smith Chart. It just needs to be selected using the "Display setup..." button at the bottom left of the main screen. Near the

What version do you have and where did it come from?Mine does not show this.

On Sat, Oct 29, 2022 at 12:12 AM, Tom Thompson W0IVJ wrote: