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Greetings, I've recently completed the construction of my first 'home brew' antenna (1/4 wave vertical). A radio friend of mine suggests I should look at resonance as well as SWR. SWR is fine, but I

try cw mode

All, The groups.io fee for maintaining this group has been paid. I received several donations after I sent the notice that the amount required had been reached and have refunded those donations. For

The screenshot function was finally solved, the reason was that there was a problem with my chip, I didn't find that the SD_CS pins were pulled low when I probed the waveform, which was very strange,

This happens when you have common mode issues and the outer surface of the coax shield has become part of the antenna. For example - A dipole connect to coax with out a balun will have this issue.

I have a -F and I have never encountered this problem with either a 10 m coaxial or a 40 m coaxial (3-30 MHz). I make my measurements from the station, the NanoVNA being connected to my PC. The

Whenever I have made measurements to antennas I have had very different results -even calibrating the antenna feed coaxial cable- than placing my VNA-F with a 10 cm. patch cord directly to the antenna

RE: "digging in" Old proverb: "When you're up to your ass in alligators it's hard to remember that your job was to drain the swamp!" Bill K2TNO [email protected]> wrote:

The best way to conquer the "steep learning curve" is to just dig in..... Dave - W?LEV [email protected]> wrote: -- Dave - W?LEV

Yes it can do much more and it has a steep learning curve... Roger

SimSmith can do all this and far more..... And.....its freeware: https://www.ae6ty.com/smith_charts/ And an excellent tutorial: https://www.w0qe.com/SimSmith.html Dave - W?LEV [email protected]>

There is an excellent free program for Windows that really helps to understand how transmission lines work. It is called TLDetails >> https://www.ac6la.com/tldetails1.html Using this program you can

I use the nanoVNA to get my Hallicrafters S-40B receiver on frequency for a CW net when using it with my Elmac AF-67 transmitter on CW. I could easily set the nanoVNA slightly off the CW frequency I

Not as a BFO, that should work well. It does make for a good VFO going into a first mixer. getting the levels right can be challenging.

Appreciate all the quick replies here confirming the BFO is do-able in theory. Easiest thing for me to try first would be the Gander VOLMET station on 13270 kHz USB, during the daytime, believe they

There is an article in the August, 1963 issue of Popular Electronics describing an external BFO. It attached to the receiver antenna terminal so the idea has been around 60 years at least. I would

Probably best to do it at the IF frequency rather than at RF. 73 Jeff G8HUL ________________________________________ Sent: 16 January 2025 13:31 To: [email protected] Subject: [nanovna-users]

Hi Bruce, Yes, I have done something similar using my NanoVNA SAA-2N. I set the NanaVNA to a particular CW frequency, but have only used it to test effects of using a filter or amplifier at the input

Has anyone ever tried using the CW output feature to generate a carrier for reception of SSB (LSB/USB) on a cheap shortwave receiver that can only receive AM mode signals? It seems like this should be

Why not perform an swr sweep and see where the min swr falls? The impedance will change with exact length of feedline but thr swr min. should show you where your antenna is closest to resonance. 73,