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How To Do A SWR Sweep on 2 Meter HT Antenna ? Whats better: Should I connect the 2 meter HT antenna directly to the VNA or should I connect the 2M HT antenna to the end of a SMA cable then to the VNA

hello, The latest menu map I have seen is for FW 1.2 The FW keeps changes so fast that, so far, no one has taken the time to try and update the menu maps. As soon as one is presented, it's obsolite.

Oh yeah. Like the venerable MRF454 with 1 ohm impedances. But the NanoVNA isn't much worse than any other VNA. And typically, you're looking to optimize a narrow band matching circuit, right? So you

Thanks PE0CWK, appreciate your help.

Hi Tim, I have tried both.? With my HW version 4.3_MS NanoVNA the MS file works fine, but with my HW version 4.2 neither the SI hex or binary files will work.? They download fine but the NanoVNA

I have loaded the, iirc, .14 with Cube just fine, but have used the .bin as opposed to .hex images . . . . Have you tried those by chance? -- Sent from my Android device with K-9 Mail. Please excuse

At least in his GitHub repo the version is still at 1.2.15 (I get the version info by grepping for this line):

Using STM32CubeProgrammer I can get both NanoVNA-H-SI_v1.2.08.00 hex and NanoVNA-H-SI_v1.2.14 hex to download to the NanoVNA-H4 but only NanoVNA-H-SI_v1.2.08.00 hex will run. DfuSe Demo (v3.0.6) will

In case it may be of interest, I also measured one of the triode sections in a 12AU7 dual triode tube recently in grounded grid. I biased it at 0Vgk and 90V HT at 11mA anode current and extracted an

To Donald S Brant Jr and Jim Lux, I want to match an old transmitting transistor. The coil nearest the base is about 6 ohms, that is about 1-3cm wire. Calibration and measuring those is hard. It is

Isn't DiSlord's latest version 1.2.16? DiSlord posted version 1.2.16 in message # 4004 on September 30, 2022. Mike N2MS

At the bottom of your e-mail you read: Learn about the NanoVNA in the following forum areas: Documentation & Update Files:/g/nanovna-users/files If you visit that link you will find:

Hi All. I am a newbie here and I need a manual for my new NanoVNA-H4 and also step by step instructions on how to calibrate and save the cal data. Frank

Nice results. I did the same experiment with a Hugen 2.3 and had to move to S21 measurements for accurate results on 1-30 MHz. Maybe, if I get around to it, I? will try these low/high resistance S11

It's also possible to post process the VNA data to do other things. Here's a chart of current gain vs frequency for the same 2N3904 at 10Vce and 10mA Ic. This chart is derived from the same dataset

I often use a lab VNA to measure and model semiconductors up to many GHz. These 2 port models work well in practice and a lot can be learned about a transistor from these measurements. In the plots

Sure - and people do that - sometimes as part of a research project or dissertation. Ultimately, what you do is look at what you need to measure, assess the uncertainty with your "50 ohm" equipment

VNA errors get high when the mismatch is also high; we try to calibrate them out but it is an imperfect process. When we needed to measure the impedances of large L-band power bipolar transistors,

I have had success on my Baofeng using a female barrow between the Baofend RP and a rubber duck with a normal BNC. Dave - WB6DHW

Across the 5MHz to 50MHz frequency range, it's still possible for a basic nanovna to make fairly accurate resistance measurements across a wide range of resistances using a basic s11 measurement. In