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I hate to to reply to myself, but I got this PM: Hi Very interesting! You mean you had someone with a computer and nanovna at the other end of the cable and you were controlling them remotely via VNC

DiSlord, Thanks for your work on the firmware keeping these devices relevant.

Martin, thank you very much for the instruction manual. I’m sure it’s gonna help many people in the future. I haven’t even read, but just took a quick glance and I can tell you did a great job.

Thank you so much Gyula, I ordered one there. Jos Op 6-11-2020 om 17:26 schreef Gyula Molnar:

Hi Dave, Maybe the reason you get a high voltage when using higher u materials is that they are working effectively and creating a high impedance to common mode current. I'm concerned that your

4NEC2 will get you in the ballpark, but we found Helix antennas didn't quite agree when tested in a commercial RF anechoic chamber and far off enough to require modifications. PITA when it's a

Hi Chris, In Wiki->Files map or my website in pdf -- *** If you are not part of the solution, then you are the problem. ( http://ha3hz.hu/ ) ***

This is the antenna when it its wound to the 14m markers so even shorter than the 7m marker on the wires. This position gives good readings for the 40, 15, and 6m bands i think i will leave it here

Hi all, Where do I get the latest DiSlord firmware download for my Nanovna H-4? I’m using windows 10 on my computer and have never tried DiSlord firmware on my nanovna as yet. Any help gratefully

Kind of weird its now stretch out as long as at it can be and it seems to be acting as though i shortened it i would have expected it to move lower. There are a lot of areas under 3:1 but they line up

I like data modes and i am a night owl so I think i am more interested in getting the 80m band I am gonna test it down the other side of the house i have 123.5 feet between the fences along that line

Thank You Martin Just what I needed right now. Easy to follow and understand even for an old fart like myself. It does in seconds what used to take hours with pen and paper or XL spreadsheets and

The choke you built is good for center fed doublets - equal lengths of wire either side of the center insulator. More or less turns on your choke will not change the resonant points of the wires. If

Dave, Yes it's nicely under 3:1 on 40 and 15 meters for sure and if i had equipment for 6m its good there as well so i guess if the markers say this setting is for 7m then would it be right to say it

David, Good reference material. I downloaded and printed out the pdf chart from the link at the bottom of the page. Roger

Martin: I believe on page 8 with respect to blue trace (R) and green trace (X), the scale is 20 ohms “per VERTICAL division,” versus “per HORIZONTAL division.” Thanks for you effort and

For those who wish to dwell more in the return loss world instead of the SWR world, or to gain a link between the two, here is a nice online chart that converts between the two measurements.

Re: your open wire fed doublet, 1. do you attach the Twin lead through a banana plug adapter into the VNA port 0 and measure directly? No. If you are referring to the data in the Word write-up, the

Baluns What is a balun really? Something which converts a balanced load, antenna etc to an unbalanced source, a transmitter a VNA etc. If your antenna is not balanced (a dipole) then you don't need a

I can't comment on your VNA measurements as I have no experience with VNAs. Mine hasn't been delivered yet but I do know about antennas. Your predicament is not going to get solved with VNA graphs &