Thanks. But at 0.37 you said 4×1k resistors in series to get 250 ohm effective resistance. It should have been "in parallel" But the dummy load may be good for HF spectrum, I believe. For the VHF UHF bands you have to use the SMD resistors on the SMA connector itself to avoid reactance. De VU2RZA
Great vid Ape! I like seeing things to back up what someone talks about, as for me it helps the info sink in better. Oh, and was looking to get one of the test boards you have listed, but the link doesn't work for me.. Searched your store and found it there. Ordered and on the way!
Thanks for the video, I've noticed there are two rows displayed at 2:50. Does that mean you have to implement either one circuit from the corresponding row? Or maybe it says that the "Series" element should be composed from 1.09 uH and 114 pF somehow?
Hi Ape, Great demonstration. You could have used a 22pf and 33pf from your kit in parallel to make 55pf of capacitance for the experiment. Stay safe. 73 WJ3U
Am I right in thinking this basically like adding a resonance coil to an antenna and tuning it? I just got ahold of a NanoVNA and barely have any idea what I'm doing with it. I saw these measurement options on it and had no clue what I was looking at. Now I have a better idea. 👍
He DP, thats pretty close. The inductor I added in series is actually a small coil under that heat shrink. I also added the capacitor... but it's a tuned circuit 👍
Very good instructional video. I have a question . My Nano VNA SAA-V2 does not appear to have the measure function or the Match L/C. I noticed you did a review on one so you likely have one. Can you tell me is there a function in My unit that does the L/C match or another way of using it to accomplish the same thing. That feature saves a lot of work.
BROTHER, i have a question if you please, i do have the exact same VNA you used in this video, i need to sync it with an IQ modulator but unfortunately as you know the VNA doesn't have a 10 Mhz input. any ideas around that before i buy liberVNA or old HP VNA? thanx.
Is it brining the antenna into resonance, or just making the transceiver believe the antenna is resonant via impedance matching? (Still new to the hobby, trying to learn as I go)
It's impedance matching, we're not making any any physical changes to the "antenna" but you would / could say the circuit is now resonate. Great question Frank, and thanks for watching 👍
Hi Ape,......I could really Use this Function, but Apparently Not all NanoVNAs have this cool "L/C Match" function.....Neither my original NanoVNA & my Newest NanoVNA--F Deepelec have the this function or make any mention of it....This is 1st even Aware such Nano feature even exist !! .....Can you Advise how I can get either my NanoVNAs to find the L/C Match function ? .....Thx...
The load ( resistors) is still NOT resonant , you just transformed the impedance from the mismatch to the 50ohms feed. ,at the frequency it’s at 155 ohms with a reactance of -j115, the L/c transforms that impedance to 50 ohms , it does NOT resonate the load at 14mhz , just keeps the transmitter happy. If that is a transmitter the inductor would probably burn up at the higher power levels.
Thanks.
But at 0.37 you said 4×1k resistors in series to get 250 ohm effective resistance. It should have been "in parallel"
But the dummy load may be good for HF spectrum, I believe.
For the VHF UHF bands you have to use the SMD resistors on the SMA connector itself to avoid reactance.
De VU2RZA
Hey Subramanian, great catch! It is indeed parallel 👍
Great tips!
Thanks for watching RT 👍
Great vid Ape! I like seeing things to back up what someone talks about, as for me it helps the info sink in better. Oh, and was looking to get one of the test boards you have listed, but the link doesn't work for me.. Searched your store and found it there. Ordered and on the way!
Glad it was helpful Arnold, good luck with the test board 👍
Great video Ape!
Thanks Shane, appreciate you stopping by... 👍
Great job explaining this.
Glad it was helpful 👍
My OCD wouldn't let me stop looking at the single resistor soldered in different from the other three!!! 🤣🤣🤣
Just tell yourself it's supposed to be that way... thanks for watching USAF 👍
The SV4401 is the best of the low cost VNAs out there. Big enough to see and use.
I agree, I love that I can read this one 👍
Wow...nice explanation! Now I just have to figure out the output impedance of the device I'm trying to match.
You can do that with the Nano, thanks for watching and good luck with the project 👍
Thanks for the video, I've noticed there are two rows displayed at 2:50. Does that mean you have to implement either one circuit from the corresponding row?
Or maybe it says that the "Series" element should be composed from 1.09 uH and 114 pF somehow?
You would use the components in row 1 or row 2. 👍
Hi Ape,
Great demonstration. You could have used a 22pf and 33pf from your kit in parallel to make 55pf of capacitance for the experiment. Stay safe. 73 WJ3U
Good call Don, I didn't even think about that. I was considering using a variable cap that I have sitting here 👍
Hey can u help me out configure my rtl device..
Where is the vna connected for measurement? I have an antenna, matching network and a receiver chip. where to connect? Thanks !
Either the transmission line or the antenna feedpoint 👍
Nice upgrade on the hat!
I couldn’t find my other one! 🧢
Am I right in thinking this basically like adding a resonance coil to an antenna and tuning it?
I just got ahold of a NanoVNA and barely have any idea what I'm doing with it. I saw these measurement options on it and had no clue what I was looking at. Now I have a better idea. 👍
He DP, thats pretty close. The inductor I added in series is actually a small coil under that heat shrink. I also added the capacitor... but it's a tuned circuit 👍
Very good instructional video. I have a question . My Nano VNA SAA-V2 does not appear to have the measure function or the Match L/C. I noticed you did a review on one so you likely have one. Can you tell me is there a function in My unit that does the L/C match or another way of using it to accomplish the same thing. That feature saves a lot of work.
Hey Joseph. I believe that the Dislord firmware has this option: github.com/DiSlord/NanoVNA-V2-firmware
QUESTION: If trimming the antenna is an option, should I do it before or after including a matching network?
I’d get it close before adding the network and then fine tune but either way 👍
have you seen the lcr tester that runs off a 3.7v 14500 cell? autodetects resistor cap inductor or even npn/pnp I think.
No, but it sounds pretty sweet 👍
@@TheSmokinApe mines the DIY MG328 tho really bare bones totally unbranded. usual import sites.
@@wrenchmonkey3920 I’ll check it out 👍
@@wrenchmonkey3920 I’ve seen these before, they are pretty cool 👍
BROTHER, i have a question if you please, i do have the exact same VNA you used in this video, i need to sync it with an IQ modulator but unfortunately as you know the VNA doesn't have a 10 Mhz input.
any ideas around that before i buy liberVNA or old HP VNA?
thanx.
Sorry man, I am not sure how to do that.
So how do I “fix” a 2m/70cm mobile install that is saying I need a load shunt?
You would need to install a match box / matching unit at the point where you take the measurement 👍
@@TheSmokinApe I have no idea what that is but I’ll google! 😅
Does it mean there’s something wrong with my instal?
Not if your swr is good. I’d mess with the antenna length if your swr is off, LC matches for UHF and VHF are pretty difficult to construct
Is it brining the antenna into resonance, or just making the transceiver believe the antenna is resonant via impedance matching? (Still new to the hobby, trying to learn as I go)
It's impedance matching, we're not making any any physical changes to the "antenna" but you would / could say the circuit is now resonate. Great question Frank, and thanks for watching 👍
Hi Ape,......I could really Use this Function, but Apparently Not all NanoVNAs have this cool "L/C Match" function.....Neither my original NanoVNA & my Newest NanoVNA--F Deepelec have the this function or make any mention of it....This is 1st even Aware such Nano feature even exist !! .....Can you Advise how I can get either my NanoVNAs to find the L/C Match function ? .....Thx...
Look under “measure” from the top menu, it should be there 👍
There's no "Measure" displayed anywhere on the menu...
Found out !! ........Apparently I need to install Firmware 1.0.0 .....Thx for helping.....
God luck with the install 👍
So is this now the VNA to go with or do you still recommend the H4?
Unless you need something like this or have a spare $500 I’d get the h4 👍
Great explanation, son!
Thanks man, it was a fun one to make 👍
OMG! Thansk!!!
👍
That's good solderin', son.
Haha, thanks Ed 👍
The load ( resistors) is still NOT resonant , you just transformed the impedance from the mismatch to the 50ohms feed. ,at the frequency it’s at 155 ohms with a reactance of -j115, the L/c transforms that impedance to 50 ohms , it does NOT resonate the load at 14mhz , just keeps the transmitter happy. If that is a transmitter the inductor would probably burn up at the higher power levels.
Glad you liked the video!
Yes that’s correct , it just matched the load to 50 ohms., keeps the transmitter happy. Hi powers would burn things up.
You meant parallel not series.
That's possible, thanks for the catch 👍
Wonder why you always wear headphones since no one is talking to you ?? ..
@@Welshwizzard1 so I can hear myself, like radio DJs
Pff.
This will work with any VNA... not just a Nana's VNA.
>click
Did I say it wouldn’t or are you just talking tuff on the internet again?