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Almost two years ago, I posted several tutorials to this group indicating how to measure both parameters. Those procedures should be in the archives in this group. Dave - W0LEV [email protected]>

Hi all, I wondered if there was a guide somewhere I could read showing me how to measure the Impeedance and Reactance of Common Mode Chokes. At this point in time I'm testing my chokes using S21 Gain

Yes it’s the small plastic with rocker so it’s the H I had this problem before for swr readings What should my scale divisions be set to My Elad shows my swr as a bit high, but won’t let me key

And even a different microprocessor! Firmware for one will NOT work on the other. -- Doug, K8RFT

Did you do a full calibration of the NanoVNA (for your frequency range)? My 3+ year old, unshielded clone works fine (for HF antennas, anyway). -- Doug, K8RFT

The Hugen -H/H4 firmware (or DiSlord FW) is not compatible with the Deepelec NanoVNA-F. There are significant hardware differences not the least of which is the screen resolution. You really need to

Greetings, I am curious about the route cause of the antenna VSWR measurement failure. As I understand it the internal missing shield problem (associated with the clones) just reduced the dynamic

Hugen made the -H, not the -F. The "F" has a 4.2 inch screen and a metal case. (I have both.) You could try installing a new firmware update, or do a full re-calibration. " my reading are all stuck

Which is of little consequence unless you are measuring high-isolation devices like filters or diplexers, and none at all for those doing one-port reflection measurements (antennas), which I suspect

On professional VNAs like the 8753, the internal isolation of the hardware is so good that the isolation calibration step is only useful if you are using a fixture that has isolation problems. For the

Yes, just declare the cal complete without doing the isolation. Dave - W?LEV -- Dave - W?LEV

does that mean i just leave both ports open and skip to the next step?.

Many times, it's appropriate to skip the isolation cal. Even professionally, HP (the 8753C) gives one the choice to specifically skip isolation. If you do conduct the isolation cal, terminate both

tekguy, You should connect 50 ohm loads to both connectors. If you have an attenuator of 10 dB or more, that can be used as a reasonable 50 ohm load. --John Gord

Oops, my fault. The correct link is https://www.youtube.com/watch?v=sVoxQtiV7cY&t=6s <https://www.youtube.com/watch?v=sVoxQtiV7cY&t=6s>. The short video lasts for 6:25. Many apologies, Robin, G8DQX

Hi,what do i do during the cal when it gets too the isolation?,ive seen a few vids but its not clear,do i connect the 50 ohm load to ch 0 or leave nothing connected to that port,or put the load on ch

The-F model has a 4 inch screen with either the rocker switch or pushbuttons depending upon models. Hugan made an original VanoVNA that was small and had the rocker switch. *Clyde K. Spencer*

interesting as much as i look my old eyes can't find that part at what timestamp in the video does he do that

hi Ive a authentic hugen vna years old still works fantasticand ive just switched it back on, ive had this problem before and Roger Need told we what to do. i only use this for swr tests and need to

Garry, 'twas ever thus! /Caveat emptor!/ 2 things: 1) you might have had better luck with the antenna if there had been a coax choke immediately before the antenna feed. Even with lots of radials,