A History of Amateur Radio
Вставка
- Опубліковано 25 сер 2024
- Cyril Browne, based in Dublin, tells us what amateur radio is, why it isn’t CB, and why it is more popular than ever. The talk includes some technical explanations of how it works, what the appeal is to enthusiasts, how they use it and what their goals are, and how it has evolved in the internet age. There is also a mention of the time his radio club arranged a radio link-up with the International Space Station for a local school.
In "Point-of-Fact" Guglielmo Marconi was NOT the invertor of the radio. It was actually Nikola Tesla, who Marconi apprenticed with in his laboratory in the 1890's. Tesla patents were finally upheld by the Supreme Court approaching Tesla's death in 1943. Just sayin'. Barry VE3BMY.
CAPS.
Thankyou I was about to coment on the same thing he stole Tesla's design and for some strange reason his lab burned down .. Set Tesla back and Marconi took all the credit.. Thanks Barry for being on the same page..
there were others
The correct use of the old railroad telegraphy code for best regards is 73. Saying 73s is equivalent to saying best regardses so it isn't normally used in plural. "Very 73 de Cliff, KU4GW"
Good presentation! Thanks
Thank you for taking the time to put this together. I learned some things I didn’t know, although I’ve been in the hobby for some time. You really captured the amateur spirit!
Very educational. Thank you for your time , gained plenty of knowledge from this lecture. Well done.
KDKA was the first commercial licensed broadcast station in the US. WWJ didn't get a commercial license until early 1922. Its first call sign was WBL but shortly changed to WWJ. Up until then the station operated as an amateur radio station under the call 8MK.
Well done. Just a few comments on the video, amateurs use frequencies above 47MHz. The velocity factor of the conductor needs to be considered in calculating the length of a half wave antenna.
73 and not 73s de Tony, EI5EM.
THE FIRST COMMERCIAL RADIO BROADCAST
WAS KDKA PITTSBURGH, PA NOVEMBER, 1920.
You aren’t boring me because it’s educational ! I’d bore everyone more by describing the moments which had me improving domestic reception of tv & fm Radio because of our regions’ poor choice of entertainment. My lack of intellect re some of the nitty gritty of the physics is overtaken by a strange fascination I’ve had with radio since being small & seeing mum thumping an old Echo wireless during reception problems & later when being sick of bbc radio 1s’ constant repetition of bee gees music on 247 metres forcing me to twiddle & finding a closer weaker signal playing The Tubes & The Stranglers at 257 which was Radio Victory 25 miles away in Portsmouth which in turn had me seriously trying to pick up their FM signal which petered out 10 miles away from us…so Punk rock helped start my radio interest ! 👍😁❤️from southern england
History of licensing is what brought me here. Fascinating case study in regulation.
2 out of 3 of your Q-codes are wrong. QSY means changing frequency. QST is used by ARRL for 'calling all amateurs.' QRL means 'are you / is this frequency busy? QRT means shutting down. 73 is 73 on telegraphy, meaning 'Best regards' in Philips code. The S is added on phone, for some unknown reason, and rarely heard in Morse, except by absolute neophytes. Other than that, good video.
Home construction is an important part of the hobby too.
Blaux Knox antenna right down the road from me. Did a video on it a couple years ago. WLW - More wattage for your cottage!
Excellent video. Very interesting and informative. Subscribed.
Let's get one fact corrected. Marconi did NOT invent radio! That accolade goes to Nikola Tesla. Marconi DID invent the vertical antenna, and he was largely responsible for commercializing radio and making improvements to it, but he did not invent it.
In 1943, the US Supreme Court declared that Tesla was the original inventor of radio, thereby reversing the US Patent Office's earlier 1904 judgment. Marconi's original patent was canceled; the Court found that Marconi actually "borrowed" 17 of Tesla's patents and copied them into his own application. In other words, Marconi plagiarized Tesla's patents!
Misinformation continues unabated, however. Even with the Court's 1943 reversal, people continue to think erroneously, even to this day, that Marconi invented radio. The US Supreme Court ruled otherwise.
Dont worry mate u r doing a grt job .... grt presentation 73s
….plus 10 years later our region hadn’t bbc radio 1 on FM so the answer was to rig up an old vhf tv Ariel which somehow improved the hissy signal from London or Mendip & in the 90s C5 was only relayed from a power station chimney as to not interfere with viewers in northern France but left a huge population in Bournemouth/ Poole & us to the east of there unable to watch - an 18 E Ariel worked but it was always grainy as was the soccer programme from neighbouring HTV West from Mendip 54 miles distant (behind 900 ft hills halfway between )BUT it was fun occasionally trawling up & down the scale on an old portable tv & better than old b&w movies from our region - until the DSO 10 years ago which has made my old TV set redundant.
We’ve considered getting CB or Amateur Radio for years & years with a home rig & one portable ( or a decent pair ) for dog walks so one reason work like yours is very helpful & interesting because there’s too much consumer choice for my non consumer mindset & even with my very basic understanding of uhf / fm reception it’s bloody confusing. We’d just need something that allows us to communicate up to just 15 miles so I’m going to re listen to the latter bit of your video.
Thanks for reading my long less than exciting story & the info .😁👍🐢
The word amateur just means you don’t earn your living from a pass time or hobby, I know many professionals that don’t know as much as the typical amateur in the same subject.
It does not mean lacking in knowledge.
Indeed, I found the Commercial GROL, Radar Endorsement and GMDSS exams no more challenging than the Amateur Extra. The Telegraph T was a bit harder but it is no longer required by anyone except some Navy jobs.
Maeconi used multiple Tesla pantents to "invent " radio
Für diesen Filmfachbeitrag vergeben wir von maximal erreichbaren Bewertungspunkten: 9.
9:45 Max power in the UK is 4W AM/FM and 12W SSB
uk to victoria/Australia, 3 watts and homemade antenna.
antenna tuning unit: does not tune the antenna !!!!!!!!!!!!!
Is that Tony Hancock in the thumbnail photo on the Home page??
Yes it is, in an episode called The Radio Ham from 1961.
You mean 47 GHz.
The number of licences might be at an all time high but where is the activity? Young people are supposedly coming into the hobby but they don't appear at radio rallies.
I found this video too long, information overload. Perhaps a few videos instead covering history, frequencies and modes, propagation, etc.
Nice chemtrails in The Yagi photo
12:00 47MHz is not an amateur band either in the UK or Eire. Amateur radio goes right down to millimetre wavelengths in the GHz range.
26:25 classy , contradicted ya self.
Q-codes are a legal requirement ? really? on what planet ?
47 mhz is not in the microwave spectrum a lot of incorrect information
I'm not familiar with other parts of the world, but in North America AM broadcast is currently 20 kHz total bandwidth, with audio response limited to 10 kHz. Although he channel spacing is 10 kHz, adjacent channels are not assigned in the same geographic areas to prevent interference. FM broadcast in North America is 150 kHz bandwidth on 200 kHz channels..
Ever since NRSC spec's decades ago, US broadcast AM is limited to 9 kHz audio, to reduce adjacent channel carrier to audio intermod, and 2nd adjacent audio interference.
Bessel functions for F3 deviation to bandwidth are a bit more complex, before considering IBOC or HD digital audio or data signals.
@@lokiva8540 Actually the main effect from adjacent channel interference is the 10 kHz heterodyne from the carrier. This may be countered by a notch filter. Used to be that this problem occurred mainly after dark, but as the FCC overfilled the AM band it began to be a problem during the day, which led to the 10 kHz audio bandpass limitation and the use of brickwall filters at both transmitter and receiver.
@@timothystockman7533
The FCC didn't actively overstuff AM the way dockets 80-90 and 83-243 plus subsequent LPFM (unless you're Steve Dunnifer, spelled out to not look as obvious as just stating that intent) did with FM dropins.
The main AM changes were ending night power reductions for Class IV's, and setting protection ratios under a few treaties at borders (mainly Canada's) rather than inside neighbor countries. Also added were super low power night or transitional hours licenses for daytime stations.
By the time that was all changing, noise sources from neighbors if not our own stuff or industry were also major limits.
Too bad we didn't get Kahn ISB AM stereo in the 1960's. It would have been useful then, both to upgrade music quality, and adaptively suppress interference. Our FM stereo tech, NTSC vestigial sideband inverse amplitude modulation video, and FM subcarrier AM stereo, were all bad tech choices guided by "honest politicians".
That's under the definition of one who once bought stays bought, unless on the rent to own plan.
23:55 , wrong. wrong!
Very important:--- ham radio can be used to collect information on damages after a hurricane or a major disaster, but it is very important that no ham radio should ever report any significant injury to a person and definitely not report any deaths. The individual ham who has received information about injury or death should telephone and local Red Cross office or if no answer then the local Police Department and report that you have ""heard " by radio information about significant injury or death and you want to report that information to an authority and mention to the authority that this is the only report you will make concerning this problem. It is two-part important ------------- one that the ham radio operator never report this kind of significant information to any source except an official such as the Red Cross or the police and #2 it is very important that the ham radio operator not repeat this information to anyone else the information must not be passed even to friends and family of the emergency person. This is not a message for ham radio to pass. If a ham radio operatOR search or hears of an emergency event such as a terrible car crash that just happened, the radio operator must pass that information to an authority, the police. a the red cross or acceptable services. desperate news should not be passed to anyone except a major authority service like the police. please
Umm you wrote a dissertation on this without any supporting evidence as to why?
In large scale regional disaster with comms down of course deaths and injuries will be reported by radio. Wtf?
I disagree Marconi invented radio. His signal of the Morse Code letter S across the Atlantic made his name in wireless communication.
A lot of people contributed to the development of radio, Maxwell predicted electromagnetic waves and Heinrich Hertz proved their existence, Professor Onesti, Professor Rutherford, Professor Branley known for his coherer in France, Captain Jackson at first ship to ship in dock in England, Popov in Russia, David Hughes in London, Loomis in America were all experimenting with Hertzian waves. Marconi came to England after the Italian Navy showed no interest in wireless. Both Jackson and Marconi provided equipment to the British Admiralty to test.
Let’s not forget Tesla
@@stevewilki7910 Yes. Tesla actually invented radio. He invented all of the basic transmitting and receiving apparatus to create the first working transmitter and receiver.
Others have stated many other physicists, experimenters and inventors were experimenting with what were then called "hertzian waves." However, experimentation is NOT invention unless the experiment is written into an application and a government patent office/bureau issues a patent.
This is where most people err. The US Patent Office erroneously issued a patent for radio to Marconi. If patent lawyers had done more vigilant research, they would've seen many "unusual" parallels between Marconi's application and Tesla's original patent, issued approximately five years PRIOR to Marconi's plagiarized application. I have no doubt that some palm greasing and under-the-table payments were exchanged.
The US Supreme Court overturned the US Patent Court's original decision in 1904. Thirty-nine years later in 1943, the US Supreme Court decided, for all time, that Nikola Tesla was THE original and first inventor of the radio transmitter and receiver. Unfortunately, that decision came five months after Tesla's death. Yet even with this overturned decision, people still insist Marconi invented radio. They couldn't be more WRONG! Marconi invented the vertical aerial antenna, and he invented the concept of "networked stations," but the underlying credit goes to Nikola Tesla.
The International Standards Organization (ISO) tried to smooth over open wounds with its own take on Mr. Tesla's invention. I don't remember the year, but the ISO assigned Tesla's name to the unit of measurement for magnetic flux density, known as a Tesla (T). From what I understand, this is an important measurement in the manufacture of MRI scanners. And we all know Elon Musk named his first electric car company "Tesla Motors," in honor of the Serbian-born inventor.
73 is already pluralised. 73's is dumb operating practice. why use morse code abbreviation for a voice contact , very odd.
Recently got my license. Went all the way to extra my first time. I was extremely surprised I knew I would get general but since it's test until you fail I went for broke and got it. I'd give you my call sign but I would revel my identity so I can't but in any case very informative and 73.
well...... C- for all topics.
one day i hope you fix your mistakes.
Nope…
Tesla invented radio…
Just saying…
There was not one inventor of radio. It was a communicably part time activity.
Yes there was. In 1943, the US Supreme Court stated Nikola Tesla was THE de facto inventor of radio. There are 17 patents under his name to prove it. And for Tesla, it was a FULL-TIME endeavor in his quest to find a way to transmit electrical power wirelessly, which can now be done via microwave energy, based on his patents.
UKRAINA WAR