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I am very new to this NanonVNA, so I don't rule out user error. I'm trying to determine if the operation of my device is normal or defective. It seems to me that it runs warm. With use it heats up

Dzi?ki ;-)

Thank you Barry. Good info to know.

I too did a 40m loop to test the NVIS on 40m. Always negative result. In both directions I lost 10 dB compared to my trapdoor doublet. On the other hand I put an L adapter to work on 20 m and there,

It is about 20 ft high and in a “delta” shape, horizontal of course. Fed with a 1:1 balun (I did not need) and 50 ft RG213 I thought I needed a 4:1 balun or a 1/4 wave 75 ohm matching line, but I

All fine and dandy, but non-applicable on the Linux system the OP was asking about. There, you get either the CLI he is asking ahout, or the ST Cube programmer.

Andy, Don't know if this will help but these info below is what I used to update my firmware in my NanoVNA-H4. NanoVNA H / H4 Firmware Now you have to download the firmware. You can find it on Github

These params work for me: for dfu file: dfu-util -a 0 -D filename.dfu for bin file: dfu-util -d 0483:df11 -a 0 -s 0x08000000:leave -D filename.bin

Folks.. I have an ancient NanoVNA, 0-900Mhz, sandwich board type. I have dfu_util already on my Linux PC and working. I have a bunch of .dfu files (NOT .BIN) that I'd like to experiment with. All I

Hi Mark, thanks for all your comments. This antenna has been up for several years now and I have addressed most of the points you covered. The wire is hard drawn so no stretching. I made no attempt to

There are some great ideas here. I have both the tinySA Ultra and the NanoVNA H4.. but add in a Hioki Analog 3030 VOM, and a owon hds2102s oscilloscope, the fluke and such, I'm still working an

I modeled the antenna presented in the previous email on the subject. It's clear why this configuration does not function on 20-meters. Have a look at the attachment. Dave - W?LEV -- Dave - W?LEV

Just an additional note, that I did not mention in this type of scenario... If you do need to do tuning, make sure you are making that decision AFTER examining the plots across ALL your workable

Hello Mike, Very nice setup. Everything looks great. I see the wire is 16 SWG (14AWG) enameled copper wire. Since you installed it, have you noticed any stretching of the wire? (Does it droop more?)

Bryan The attached drawings should answer your questions. The wire was bent to fit my garden. Performance is very good, with 100W SSB QSOs from my QTH near London to the US midwest, South America and

How high Barry?

So, it's just a tad too long to center on the band. But if you're a CW operator, perfect. Dave - W?LEV -- Dave - W?LEV

Thank you, Zack and Robin for the reply. I bought a NANO VNA and had second thoughts about using it to measure an AM radio station tower, given the presence of another local AM signal. I might make an

I just put up a full one-wavelength (140 ft) 40 meter loop antenna for NVIS over the MidAtlantic area. testing with my 3 yr old Nano VNA reveals no surprises using Nano VNA SAVER to make these graphs

Adding to Zack's reply, the first active device that the input encounters is an SA612 mixer chip. The data sheet (from NXP) suggests that compression non-linearity starts at around -30 dBm, and is -1