Let's talk about radio technology, Zig Forums. What would be a good radio frequency for point-to-point transmission of data without needing to go through the FCC? My guess would be the unlicensed microwave frequencies, but that's not good for transmitting through weather. Is there something near AM that could use the magnetic portion of a radio wave to transmit digital data legally like how AM does? The idea of a high-gain loop antenna on top of a pole for sending/receiving digital data seems intriguing.
Have any of you guys built your own radios? If so, what kit did you use and how good was it?
Does increasing antenna length or size do anything to affect the gain of said antenna or is it more complicated than just adding more metal?
What amplification kits exist that could be used for boosting signals coming from an antenna?
433 mhz ? you can find cheap radio modules for that, connect it to a pi or arduino or go full analog
Evan Ortiz
As long as you don't transmit beyond 150 feet or something, it is legal.
Jace Evans
No idea. But you have to be knowledgeable about how your signal attenuates due to weather and distance.
Wow genius! You must be getting a nobel to separate magnetic waves from electromagnetic waves and transmitting that to send data. What will the electric wave do? Come here to shitpost?
Yes. Very basic MW radios with ~1.5m range. I used some transistors.
It depends on the antenna. the length and size generally determine the wavelength of your transmission. The gain depends on the type of antenna you are using. If your antenna is omnidirectional, you can increase the gain by increasing power to the antenna. If it has a directed gain, then you need a polar map of the antenna and figure out in which direction you get maximum gain. Then arrange or modify the antenna to maximize or sharpen it. You might also want to reduce the side-lobes to increase efficiency.
Your last stage amplifier should be able to boost your signal. Give it more power supply. And choose something whose output impedance matches with the input impedance of antenna.
Do you have a girlfriend? I guess not. Here is an anime girl for you. Perfect waifu. Your autism will be cured.
Everything in the ISM band is loosely regulated. Title 47 CFR Part 15 defines allowed unlicenced communication.
Basically, you can build and use your own stuff as long you play fair (Reasonable about of transmission power, so you don't blanket others).
Juan Price
Its either regulation, or swarms of old angery boomer hams busting down your door with sledge hammers and seizing your transmitters and antennas at gunpoint because your transmissions aggressively interfered with theirs. Yes, some of them are that serious.
You could try using the PMR 446 band with a 500mW transmitter, that's the band for cheap unlicensed walkie-talkies, and the 500mW is the transmission limit in that band, in a good day(at night) it can get some incredible distances.
Nope.
Does increasing antenna length or size do anything to affect the gain of said antenna or is it more complicated than just adding more metal? the antenna size is determined by the band you're trying to use, by the wavelength, you're going to gain the most by having a full wavelength antenna, but depending on the frequency you're using, it's going to escalate very quickly, so most antennas are a harmonic fraction (a quarter, an eighth) of the full wavelength or a fractal. Really, any piece of wire can recieve any frequency, but if it's length is an harmonic of the frequency it's going to have a noticeable gain on that particular band. But you should be careful of adding more gain without thinking about it as it also makes the noise floor higher.
All of them Wideband amplification? no problem. Single band amplification? yep. Single channel amplification? of course.
Parker Brown
That would be me. Radio space is very much a shared resource. I am offended when selfish individuals want to take this commons away from the rest of the public. This level of offense is really on the level of life and death because it is a resource that can support injured people in their rehabilitation to being well.
Jacob Foster
You're a fucking autist. You could have played the we need it in an emergency card, but those frequencies are already agreed on and are monitored by the relevant bodies.
Henry Wood
you're the reason i'm designing a traveling solar sdr balloon to loop earrape on all frequencies
Joseph Martinez
The government is very good at tracing the history of components used in electronics.
Adrian Flores
lmao
Bentley Bailey
Yar, fucking fund it.
Cooper Gomez
Radios are for boomers
Carter Powell
Everything wireless is radio
Anthony Allen
Just make it nuke itself.
Lincoln Cox
Have you seen the videos of government agencies recovering airline fragments. They will literally reconstruct every remaining component over the course of a decade until they have enough to figure out where it came from.
Connor Ross
Have you seen the videos of government agencies recovering airline fragments? They will literally reconstruct every remaining component over the course of a decade until they have enough to figure out where it came from.
Brayden Bailey
They have black boxes for that actually orange coloured It's simple to avoid that shit, delay the beginning of the emission some time and don't have GPS.
John Edwards
Let's just throw away good technology, cuz boomers. ZOMG!!!! GUYZ ZUCKERBERG JUST INVENTED FACEBOOK DIGITAL RADIO 101010101011111010101010101010 MUH TUNES!!!!
Adam Gutierrez
Adhoc Wifi is probably the best legal way of transmitting data. AM and FM don't transmit digital data. They are both analog. There is such thing as HF digital modems, but they are like dial up modem speeds. You couldn't do wide bandwidth transmissions in HF without the FCC raping you with a plunger after they take away everything you own.
Austin Butler
Aren't digital transmissions highly regulated?
Nolan Clark
You don't understand what those acronyms stand for. What is 4G?
You can transmit whatever the fuck you want with an unlicensed PMR-446 that nobody is going to say shit about it.
Julian Williams
I don't think this applies with the FCC.
Austin Wilson
No it's the ECC. Your equivalent band would be the FRS channels 8 to 14.
Leo Clark
Please go educate yourself.
Julian Gomez
How about you stop larping and go educate yourself?
Fab all of the parts yourself so once they reconstruct it there's nothing to look up in factories as you made it. This also means creating from scratch the parts for the baloon and string etc etc. Just make sure to have it self destruct and to clean all fingerprints/human residue/residue from local area off all the parts and make it super clean.
Your worst enemy would be getting triangulated. They could measure the signal strength and do a massive operation to find you because why not and the police have too much free time.
Next would be implementing ECC and autoatically correct corrupted shit like how packets work and other shit that ensures TxRx quality from bad weather or interferrance because you're trying to go in the digital realm.
Get Ubuquity like this user says to save you time then have a unlocked router that has many features but don't let the Land of the Free know about your router.
Adrian Lopez
Salvage parts. scrub off anything that can be used to identify shit after palcing them and make your own PCB or don't and have everything via wires, it's going to be a mess but if it works it works, and give it an isoprpyl alcohol bath before sending it out, just in case.
