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The normal way to do it on the nanovna is a bit different. You attach the near end of the coax to the nanovna, then calibrate (using the open/short/load calibration loads) at the far end of the cable.

Phil, From what I've seen on the various write ups and Youtubes, you are able to determine the length, loss and any breaks in a coax by shorting the far end and using the 2nd VNA port to determine the

The AntScope2 software by RigExpert allows the user to add or subtract cable and then make a series of measurements. There is a database of cable types (RG-58, LMRxxx etc.) to choose from. You select

Roger, Martin straightened me out, got it upgraded. But, special thank for your document. Much needed. 73 Paul W1BIU

Matin, Thank you, that's what I needed. Upgrade went like a Qiuck Brown Fox! 73 Paul W1BIU

Paul, Hugen is the manufacturer of the NanaVNA-H4 and he tracks DiSlord's firmware release and periodically issues updates for your NanoVNA. You can get his recent update here >>

Just download the NanoVNA-H4.bin file and send it to the NanoVNA-H4 instead of the build/ch.bin file. $ dfu-util -d 0483:df11 -a 0 -s 0x08000000:leave -D NanoVNA-H4.bin

I downloaded NanoVNA-H4.dfu to my Macbook, and have dfu-util installed and working from a Terminal screen, as I used it on my TinySA. The only instructions I find for command line are: $ dfu-util -d

On 12/8/22 8:23 AM, William tunna wrote: > Thank you for the highly detailed response Bob, I have indeed got the shielding from the coaxial soldered to the strip on the top of the fuselage and the

A typical dipole made with relatively thin conductor has a 2:1 bandwidth of roughly 10% or ±5% of the center frequency. Your total bandwidth is 136 - 117 = 19 MHz Please note this is not mHz which

Thank you for the highly detailed response Bob, I have indeed got the shielding from the coaxial soldered to the strip on the top of the fuselage and the centre core soldered to the strip going up the

For more bandwidth, build a 2D (flat) bow tie antenna. Make it vertically polarized for best performance.

Hello all XMAS-gift hopefuls, Is there a way/method/technique for subtracting coax length from readings, as can be done in Rig-Expert's ANTScope, sftwr? 73 Phil, WF3W

117 to 136MHz is a wide band, proportionally wider than the amateur 80 meter band, which is also difficult to cover with a single antenna. One method of broadbanding a dipole antenna is to make the

Hello Bill, You have explained your problem quite well. Presumably the leading edge of the vertical stabiliser on your aircraft will be faired with fabric, fibreglass or timber. If it will be faired

Should have a balun at the feedpoint. The OEM dipole in my Cessna did. This reduces/eliminates the effect of the feedline and rest of the radio and wiring in the aircraft.

Hello all. Have had this VNA for a while and never used it much. Plugged it in to charge after a couple of years. Did well. Went thru all the usual calibration steps as always did in the past.

Each half of your dipole should be around 60 cm. They should be both equal in length for your center frequency of 126 mhz Trim each end by the same amount on each test. Half wave dipole length calc in

Hi all, I hope this is okay to post in this group as I'm new here. I've built a dipole antenna using copper tape and a RG58 coaxial for my kit aircraft as per some plans I have and I wanted to test it

This is where the magic of DiSlord happens, either you get his source code and build it yourself (currently 1.2.16): https://github.com/DiSlord/NanoVNA-D Or you get my -H and -H4 binaries (choose one