The type of coaxial; cable also matters. You want to use cable that is not only 50 ohms in impedance but also good for the band you are operating on plus making sure it can handle the TX RF power in watts you are running into it. Another factor on cable is length. You need to determine how long a cable you need then find one that will work for you with low losses over the length. There will be loss so you want to minimize these as much as possible by choosing the correct cable, not using a lot of adapters and making sure the end fittings are installed correctly, secure and water tight. Water ingress can cause major issues (corrosion) if a fitting is not tightened down fully and treated to resist water..

@inspiresoundpro

8 ай бұрын

Yes I talk about all of that in my other videos. Check them out.

@TheOirishhAmerican

3 ай бұрын

LMR-400 50ohm is preferrable.

The level of work you put into these videos is amazing. Thank you...

@inspiresoundpro

7 ай бұрын

You are very welcome :) Thank you for saying.

I like the antenna build videos! I wonder if its possible to make a tuneable tv antenna the same way?

@inspiresoundpro

6 ай бұрын

Thank you. Yes it is possible to make a tunable TV antenna but most TV antennas are directional yagi antennas that have massive gain but they need to point t in the direction of the TV station. But you could build a dipole antenna like the one in my other video for TV frequencies. It actually would be even easier because most terrestrial TV frequencies are VHF or UHF which have a much shorter wave length. That means the antenna would be much smaller. So less material needed and easier to set up.

Hi i have a question I have a 15w fm transmitter with the antenna that came with it but my question is Is it normal when i turn on the transmitter that the antenna becomes very warm after 1 minute of being on? Is ot because it is out of tune or they are supposed to get hot while working Thanks

@inspiresoundpro

7 ай бұрын

If it gets warm switch it off immediately. The transmitter can blow its power transistors. The antenna should never get hot even if you put 100 watts into it. Very likely your antenna is bad or possibly because you are using it indoors that is getting reflections. 15W also has a huge range so I would say be careful with that.

@gearamihai2782

7 ай бұрын

@@inspiresoundpro yeah its a small antenna that came with the transmitter And another thing Is it normal that when I touch the antenna it gives me a shock And furthermore when I touch the antenna with a piece of metal I can see an arc forming

@inspiresoundpro

7 ай бұрын

LOL seriously throw that away. It's junk

animation is good ❤❤

@inspiresoundpro

Жыл бұрын

Thank you. I hope it helps keep people interested in the video lol. 😀

@HIFISOUNDS

Жыл бұрын

@@inspiresoundpro best wishes . This animation reminded me of the character 'Charlie Frost' from the Movie '2012' 😁😁 .

@inspiresoundpro

Жыл бұрын

LOL! I don't know how that happens. I guess funny things can make us think of other things. Hey as long as you enjoyed it :)

@HIFISOUNDS

Жыл бұрын

@@inspiresoundpro you are 100 % right . i liked your presentation , very easy to understand . thats why i subscribed 😊

@inspiresoundpro

Жыл бұрын

Thank you :) I try my best to make my videos easy to understand. I feel like if my videos don't help people then there is no point lol. Thanks for subscribing too! I just past 1K subs so I'm so excited! So nice to see new subscribers. It means a lot thank you :)

But it antenna should be tune with antenna analyzer instead of SWR power meter

@inspiresoundpro

Жыл бұрын

Hey thanks for your comment. Yes you can certainly use an antenna analyzer but with only one frequency being used for broadcast FM stations an SWR meter can be more than enough. With multiple frequencies being used for example in HAM radio antennas then an antenna analyzer can certainly be better. This video is also intended for first time antenna tuners so an antenna analyzer might be good for a more advanced tutorial. But yes an antenna analyzer is great for tuning antennas :)

Actually, those radio waves are not that dangerous... even with 1kW it won't heat you up enough!

@inspiresoundpro

6 ай бұрын

Yes, the FM signal coming out of the antenna (depending on signal strength) which is set up correctly is most likely not going to heat you up enough to harm you purely with heat but is still very unhealthy. Extended exposure to high-power radio waves can cause all sorts of medical problems. I am not a doctor and don't give any medical advice so don't take this as medical advice or safety advice of any kind but from my experience most responsible broadcast companies will not allow anyone to be near a high-power signal for any length of time. In many broadcast installations, the entire broadcasting system needs to be shut down before anyone can even walk into the room where the equipment is stored. There may even be regulations in different countries that prohibit close contact with high-power transmitters when they are on, not to mention being anywhere near the antenna that is putting out any significant power. Working on an antenna that is "live" with RF power is also silly because if, for example, the cable is pulled out then the transmitter can be damaged because of the load being mismatched and if the person holding the end of that cable touches the core of that cable they could end up with some serious medical problems. Like I said, I am not a doctor and don't give medical advice, but I also would not advise people to be irresponsible.

@sjoervanderploeg4340

6 ай бұрын

@@inspiresoundpro I never said to touch an antenna that is live. Either way, those radio waves are not going to hurt you. Yes, if you are next to a high power millimeter wave antenna you could get some tissue damage because it can't dissipate the heat fast enough. But for FM down near the 100MHz range, you would need an awful lot of power... not something anyone making a DIY antenna is going to deal with. We have a 50kW output, in general radio waves are a form of non-ionizing radiation so all that happens is heat transfer. Nothing more, nothing less.

@inspiresoundpro

6 ай бұрын

I didn't say that you said to touch the antenna. I was simply pointing out the dangers. As you mentioned, there are people who enjoy DIY projects, which I have on this channel. They are not always aware of potential dangers. The part in the video about being near the antenna when it is on is precautionary. It was not intended to be a scientific explanation of how radio waves affect people. I assumed that most people would understand that the cartoon character would also show that there was some exaggeration in expressing how dangerous it is while still suggesting that people be safe. I get your point about the level of power of radio signals needed to become a serious problem but the clip in the video was a simple short cautionary insert to make people aware of potential dangers and not to make a factual statement about the level of radio signals and their direct corollation with specific medical conditions. I'm not sure why you seem to take this so personally. It's a fun video filled with animation to introduce new people to tuning antennas and not a documentary. The video is far from being a scientific thesis and more a fun piece of edutainment. While I enjoy and appreciate input from so many people, I really did not intend to put out a controversial statement about any disputed scientific facts to start a battle of wills. If you see the video in the light of how it was intended you might understand that the argument is moot.