Thank you very much. The S20 is a good phone. I lost mine while on vacation and replaced it with the s21.

I do apologize. That was definitely not our intention, and I'll be sure to include both measurements in the next video.

That's a good point!

because of antenna size. antenna size has to be at least 1/4 of the wavelenght 700 MHz wavelenght is 0,4m so minimal antenna size iz 0,1m 50 MHz wavelenght is 6m so minimal antenna size iz 1,4m

I think you're describing the future of cellular networks and what we'll be seeing with satellite networks.

@@TelecomTraining super low earth orbit to reduce latency. I tried gaming on satellite and it was unusable

You're doing very well with 750Mbps. Your speed is very good. However the majority of cellphone subscribers don't get such high speeds generally because of where they may be located in proximity to the cell tower.

@@TelecomTraining That makes sense I guess. I was in one part of town with a big hill and tall trees blocking and got 40 Mbps there. So it does seem that on rare occasions it might go lower. Glad I don't live on that street!

You're welcome

That's a very good question. The first director element has to be 5% shorter than the driven element. The 2nd, 3rd, 4th, and even 5th director element etc. of course has to be shorter but how much shorter depends on how narrow you want your transmitted signal to be or if you are receiving a signal how focus you want your antenna to be.

Not yet!

No we still use coax cable. However cable companies use fiber-optic cable as the backbone and the final distance to homes and businesses use coaxial cable. Newer or refurbished areas may have total Fiberoptic cable but a large part of the cable network is still coaxial cable.

I am so sorry to hear about your experience. Thank you for sharing that. Take care.

You can use the IMEI number or the serial number of the phone in either one of the websites I introduced you to in order to find the age of the phone.

I did change the microphone. Thank you so much for bringing that to my attention. It really made a difference.

@@TelecomTraining Cheers!

You're welcome.

You are correct. However what I was referring to was a bit different. I was referring to how frequency is divided into channels with modems, and connecting cable bandwidth limitations.

Thank you

It really is!

Awesome, thank you!

Thank you so much. I really did not know about this piece of history. One of the benefits of making these videos is that we gain so much knowledge from each other. Thank you so much for sharing this with us. Take care.

You got your wish. I'll be releasing a video with in the next two weeks on how to design a Yagi Antenna. This would be a total design showing how to calculate the length of the elements, spacing between elements etc. This video would be released before the end of October.

@@TelecomTraining -- FANTASTIC.. THANK YOU!

Glad it was helpful!

Thanks for the question. Changing the shape of the wire from round to square won't solve the issue where high frequencies find high resistance down the middle of copper wire, and is forced to travel along the outer edge. This is called the skin effect.

Thank you

Coaxial cable may have a different impedance depending on the cable. Like RG 6 75 ohms and RG8 50. The impedance of the cable should match the equipment it is connected too in order to have maximum power transfer.

You're welcome

While it's true that the inner and outer conductors in a coaxial cable or a monopole antenna connection carry the same signal, they do so in very different ways, and their roles are not interchangeable. Here's why swapping them would make a difference: 1. Signal Propagation and Radiation Inner Conductor: In a monopole antenna, the inner conductor carries the signal to the radiating element (the monopole). This radiating element is designed to emit electromagnetic waves into the environment. Outer Conductor: The outer conductor (shield) in a coaxial cable is typically grounded. It acts as a reference plane (ground plane) and helps to return the signal in a controlled manner without radiating it. It also prevents interference and leakage of electromagnetic waves. Swapping these would mean the ground becomes the radiating element and the signal would no longer be properly transferred to the antenna structure designed to radiate. This would severely degrade or block the antenna’s ability to radiate efficiently. 2. Impedance Matching Coaxial cables and antennas are designed for a specific impedance, typically 50 ohms for RF systems. The coaxial cable's impedance depends on the ratio of the inner conductor's diameter to the outer conductor's diameter, as well as the material between them. Swapping the inner and outer conductors would dramatically change the impedance, leading to severe impedance mismatch. This mismatch results in reflection of the signal back toward the source, causing signal loss and inefficiency. I'll be releasing a video within the next ten days explaining "How Monopole antennas work" in detail. Hopefully it would answer any doubts you may still have. Thanks for the question. This is a very good question. I am sure many people may be thinking about the same.

Cool, thanks👍

Thank you so much. I do appreciate that.

Hello, thanks for the input. However a reference to 600 ohms impedance or a ratio of 12:1 was never made in this video.

@@TelecomTraining Sure it was, when you showed the chart of swr values up to 10:1. I'm talking about the mismatch at the feedpoint. That mismatch is defined by the impedance of the antenna load and the transmission line's Z0. Whether it is 10:1 or 12:1, the principle is the same and there is large reflected power. The question is, what happens to that power and your presentation implied that it was lost. If the generator is matched to the line it is NOT lost and the system as described is super high efficient

You're welcome.

Well that is on a totally different level which would require much more time to explain. However for anyone who may be curious. The reflected power is caused by the capacitance and inductance in the cable which is only seem when the impedance is not the same for the Transmitter out, the cable and the antenna. When impedance is the same just resistance play a role so you don't have reflected power. I'll make a video to further explain this soon.

@@TelecomTraining Thank you. I think the closest explanation is Power Factor. Your explanation is just a more detailed impedance definition, not a physical explanation. We know its due to capacitance and inductance. Please post a video explaining physical reasons. I'm very curious

Thank you.

That would work as well.

Thank you

Yes you can use either twisted pair or coaxial for speaker. Neither is ideal. If I had to pick one it would be twisted pair. Coaxial cable is good as well but more expensive to be used for just speaker wire.

You are welcome

In what way?

@@TelecomTraining after one month I have seen too many other videos I don't recall anymore I would have to rewatch again

They trap your mind, that much is for sure. 😂

You are welcome

Yes it can be called FTTP. Some Telecom companies refer to it as FTTH for Residencial customers and FTTB for business customers. Sone others refer yo it as FTTP which covers both.

Thanks

Thank you. I do appreciate that.🙏

You're welcome.