Very informative video and you made a good point regarding the VNA causing continual interference. I didn't realise that. Great video, well presented, shame about the intro music noise. 😉
@@acestudioscouk-Ace-G0ACE sorry the intro is painful. Haha. This whole project is definitely a work in progress, and I’ll keep trying to learn and improve as I go. Thank you for your patience.
I can't remember exactly where I heard this. But someone mentioned that using a balun is not always needed. In the beginning of my ham ventures I used one once. Didn't ever use one after that as it did seem to do anything. That might be something to experiment with. Nice video. Gets me motivated to delve deeper in my Nano VNA.
Or perhaps there was another point to be made.. further investigation is needed to understand what’s going on here… which is what happens in a follow up video… 😉
The balun keeps your coax shield at ground potential and keeps the coax from adding a spurious radiation sidelobe at a high launch angle. Mostly for the purists as you've measured nearly the same characteristic seen by the transmitter.
You'll get even better results on the screen if you swap out that imperfect antenna for a high quality dummy load. I mean, it won't radiate anything, but the results on the screen will be good, and that's the main thing right? ;)
Very informative video and you made a good point regarding the VNA causing continual interference. I didn't realise that. Great video, well presented, shame about the intro music noise. 😉
Haha! Yeah, I was waiting for the ribbing on that.. and here it is! Lol!
@@ve6wo Lol! Your videos are really good and now I skip the first 40 secs or so to get to the good stuff. Keep up the good work!
@@acestudioscouk-Ace-G0ACE sorry the intro is painful. Haha. This whole project is definitely a work in progress, and I’ll keep trying to learn and improve as I go. Thank you for your patience.
Interesting to know that the addition of a choke made little difference. I use chokes to reduce RF. Great video and Many thanks.
Ahhhh, but if I can see no difference using the nanoVNA, why would we need a balun? Next video.. ;-)
@@ve6wo Reduces common mode interference.
Thanks, Gregg, nicely done! I have a Nano VNA I need to get smart on... look like I need to dive into some of your vids!
I can't remember exactly where I heard this. But someone mentioned that using a balun is not always needed. In the beginning of my ham ventures I used one once. Didn't ever use one after that as it did seem to do anything.
That might be something to experiment with.
Nice video. Gets me motivated to delve deeper in my Nano VNA.
If it wasn't doing anything, then it wasn't designed and built right !
Or perhaps there was another point to be made.. further investigation is needed to understand what’s going on here… which is what happens in a follow up video… 😉
The balun keeps your coax shield at ground potential and keeps the coax from adding a spurious radiation sidelobe at a high launch angle. Mostly for the purists as you've measured nearly the same characteristic seen by the transmitter.
Common Mode Current Balun is preferred
Would also be nice to hear / see any difference with the balun switched in or out with a relay for the demo.
You'll get even better results on the screen if you swap out that imperfect antenna for a high quality dummy load.
I mean, it won't radiate anything, but the results on the screen will be good, and that's the main thing right? ;)