UPDATE (1 July 2020): Yes, I managed to tune a random wire (a bit less than 10meters), get it to 1.3 SWR and listen to the 14Mhz band! Check out Episode 51.
I'm working my way through your videos - just the sort of thing that interests me - thank you! I'm sure you would enjoy amateur radio. All the best Kevin M0XYM
Perhaps make another video in which you connect the NanoVNA S11 and S21. This will show the working of the filter. I do have to add, I am not fond of tunes. Yes, it does protect your transmitter, but other then this I see no added value. In case your antenna is not a good match for the frequency you wish to transmit on, the matcher can protect your transmitter, but some (or a lot) power will be lost in the matcher itself.
Yeah I completely agree (as I have learnt from some experiments). I now believe (like you) that the right thing to do is just to have a properly matched antenna, with no tunes, at least for home usage. Unfortunately I live in an apartment and I haven't yet found a good solution.
hi! No tuners like this only work with very low frequencies, like the HF (3-30Mhz) ham radio band. For 2.4 Ghz you need an entirely different type of technology.
@@dattran0000 Generally it is very easy (and cheap) to find antennas that are already 50ohm matched at 2.4Ghz (because 2.4ghz is the very populare frequency of Wifi) so that you will not need an external tuner. What kind of antenna do you have?
@@therfnoob7697 i usually use some flexible antenna, dipole antenna, pcb inverted-F antenna. I always retune when i assemble it into a shell. Of course, it is very easy to retune, but if i have a tunner, i will not have to solder some components
At that high frequency a tuner (if available) would cause so much loss of the signal it would not be worth it. Better off retuning your antenna as described using quality low loss coax and connectors.
I good video many compliments, i should i buy a manual tuner for my 20 watt max hf radio. I am undecided between the MFJ 901 model and the MFJ 902 model. The 901 tunes up to 160m (1.8) Mhz while the 902 has 6 Meters (which I don't care about) but starts from 80 m ie 3.6 Mhz. The 901 has the coil in the air, the 902 has coils wound in 3 toroids. What's the difference? Which do you recommend to buy between 901 and 902? I am inclined to buy the 901. Could you tell me how to make the bridge? I saw in a forum that they mount a switch which is certainly an alternative to the jumper. But what specifically is the jumper switch for?
UPDATE (1 July 2020): Yes, I managed to tune a random wire (a bit less than 10meters), get it to 1.3 SWR and listen to the 14Mhz band! Check out Episode 51.
Great videos thanks for sharing. Keep at it I am sure you will be a good youtuber.
thanks a lot for the kind words! :)
I'm working my way through your videos - just the sort of thing that interests me - thank you! I'm sure you would enjoy amateur radio. All the best Kevin M0XYM
thanks Kevin!
I was concerned about low q on ferrite inductors, but the vna says otherwise. I wonder how efficient, compared to air inductor, as mfj 901.
Perhaps make another video in which you connect the NanoVNA S11 and S21.
This will show the working of the filter.
I do have to add, I am not fond of tunes. Yes, it does protect your transmitter, but other then this I see no added value.
In case your antenna is not a good match for the frequency you wish to transmit on, the matcher can protect your transmitter, but some (or a lot) power will be lost in the matcher itself.
Yeah I completely agree (as I have learnt from some experiments). I now believe (like you) that the right thing to do is just to have a properly matched antenna, with no tunes, at least for home usage. Unfortunately I live in an apartment and I haven't yet found a good solution.
Could you use this tunner for tunning an 2.4GHz wifi antenna ?
hi! No tuners like this only work with very low frequencies, like the HF (3-30Mhz) ham radio band.
For 2.4 Ghz you need an entirely different type of technology.
@@therfnoob7697 thanks for your reply, i always hope to a tuner working at 2.4GHz, but i can not find it
@@dattran0000 Generally it is very easy (and cheap) to find antennas that are already 50ohm matched at 2.4Ghz (because 2.4ghz is the very populare frequency of Wifi) so that you will not need an external tuner. What kind of antenna do you have?
@@therfnoob7697 i usually use some flexible antenna, dipole antenna, pcb inverted-F antenna. I always retune when i assemble it into a shell. Of course, it is very easy to retune, but if i have a tunner, i will not have to solder some components
At that high frequency a tuner (if available) would cause so much loss of the signal it would not be worth it. Better off retuning your antenna as described using quality low loss coax and connectors.
I good video many compliments, i should i buy a manual tuner for my 20 watt max hf radio. I am undecided between the MFJ 901 model and the MFJ 902 model. The 901 tunes up to 160m (1.8) Mhz while the 902 has 6 Meters (which I don't care about) but starts from 80 m ie 3.6 Mhz. The 901 has the coil in the air, the 902 has coils wound in 3 toroids. What's the difference? Which do you recommend to buy between 901 and 902? I am inclined to buy the 901. Could you tell me how to make the bridge? I saw in a forum that they mount a switch which is certainly an alternative to the jumper. But what specifically is the jumper switch for?