How to Build A 10 Watt FM Broadcast Transmitter & Station
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- Опубліковано 30 лип 2011
- This video guides you through the steps of building a 10 watt FM broadcast transmitter and provides an overview of what is required to to set up an FM broadcast station.
Mircopower broadcasting primer - www.scribd.com/document/83369...
10 Watt PLL FM Exciter/Transmitter kit documentation - www.scribd.com/document/25313...
Broadcast range chart (your mileage may vary due to topography, height and density of surrounding buildings, etc.) - www.scribd.com/doc/12743961/B...
For further details and information, please visit www.freeradio.org or our store site - www.rfemporium.com where we offer a broad range of equipment.
This is why I love youtube. Back in the early 90s I really had to search our books and people to teach me this stuff. Now it's all conveniently put into one video. What a cool guy!
Very good explanation i am 66 when i was 30 years old i built a transmitter with smaller power. it was much easier , thank you greetings from Frankfurt
Love what you guys have been doing. The average enthusiast who wants to get into micro broadcasting often needs a hand with some of the technical aspects. You've been a blessing to all of us in pirate radio land by providing equipment and tutorials. Keep up the good work, and a big "thank you" from free speech proponents and micro broadcasters everywhere!
In the 1990's I was "R. Scott Communications". I built & sold 100's of Low-Power FM Broadcast Transmitters (mono & stereo, 5-25 watts) plus RF Amps. It was so cool to see these micro stations popping up all over the U.S. & Canada! I am pleased to see Stephen is still at it....also Wavemach Comm of Canada. Rock On Brothers!! (PS: Maybe I should go back on the Air....I still have a 25 Watt Unit...haha! Thanks for posting this video!
Thank you so much for taking the time to document this so others can learn from it im sure all watching appreciate your effort!
Man, this looks like a ton of fun to do. Love that you guys are into Aphex Twin as well. Peace
Nice video, thanks for sharing!
GREAT video!! Thank you!
THIS IS MY BEST CHOISE THANK YOU SIR
Thanks man.Very interesting.Much appreciate you making the effort.. Cap.
OMG in dying here!! Great Video and Taste of Musik RDJ for Life!
where can i get a 7-10 watt radio transmitter ? thanks --
Cool video! Just finished a 250w FM amp for the 15w trans. It worked, well, TOO good. Now for the license,, ha. ;) The homebrew antenna handles everything at 1.1...Take Care, keep up the good work!
Dad: Why is the FCC here?
Son: Uhhhhh
@@rnelson299 And still, to this day, all these years later. STILL NO F.C.C.. They don't care about this BS.
I love you Mr Stephen Dunifer :-)
Intresting Video, thanks for sharing......
This should be named: How to bypass youtubes spam filter by naming our commercials differently :)
Very good video ,well done.
Can you provide schematics? I would like to study how it is made and how works.
The best application for the transmitter shown in this video is a pub that does live gigs, as it helps get punters through the door while acting as a showcase for new talent and as a common courtesy for the fans who can't come to see their favourite bands because they're sick or working.
very good video
Good Work
Way awesome..good skills sw fun hehe
Finaly, now i can finish my number station.
Excellent. I can see I was just being lazy, as I would have known that if I put in the time to look at the amplifier stage...Thank's for the quick reply.
Thanks for posting this video! I would love to set up a radio station, but always thought it would be very difficult and expensive. After watching your video, and viewing your website, it seems it may be a reality. What size transmitters do average radio stations use? Thanks again for the video.
the aphex twin song is a really really nice touch.
oh and the antenna was tuned to my frquency (93.9 MHz) - it had two plates which had to be aligned at the bottom , I forget now where I got the antenna from but it was great - you could tune it using a SWR meter no problems but that was a bit "hit and miss" trial and error but there was a machine which would help i think it was "veronica kits" or something the guy tuned it all for me - top fella :)
I really need one of your transmitters... i am in Jamaica.. need to talk with you!
thank you for sharing. what frequency are your carrier and signal working at.sir?
It's an MFJ-259B. On VHF it covers up to 170 MHz. So it will cover the FM broadcast band. Not the cheapest thing around; but it's an excellent piece of test equipment. Worth every penny I payed for it.
You can always boost the power of the transmitter, but more power is not a substitute for a crappy antenna. 10 watts and a good antenna should be fine. On 2 meter FM I can reach a guy 6.5 miles away using only 5 watts. It works because we both have good antennas.
thanks its nice project, pls can you make more tutorials about this?..
The problem is that it was weeks ago that I put it together - minus the final + copper. I didn't finish it and power it until last week and when I did the final got instantly hot and the LED came on for a few seconds then faded to nothing. There was no mod on the carrier freq ether. The soldering portion of this was super easy, however there was some differences in what was in the directions, on the silkscreen, and on the parts sheet (with components taped to it). I can't remember specifically.
well done thanks for the video,i once had a transmitter that put out some 150watts and a big 15 element long boom wide spaced yagi,but as i was going through my ham radio licences i was always a bit worried about using it,ended up swapping it for a ham radio.dont u guys get lots of hassel from the fcc(offcom in the uk),using pirate cb was bad anuff,.
kev
realy i love you :-)
Ok and pr how would you send me a complete 10 watt antenna and cable transmitter equipment here for rio de janeiro brazil?
Hello again, friend! I need to do both corrections, on my ("poor") English: when I´ve told "VCO was DEVICING...", I was meaning "DERIVING", and when I told "AN very small frequency error...", I was meaning "A very...". Sorry, I´ve just remembered them, few minutes ago...
Are there any plans to create a variable-wattage transmitter? It would be nice to go from 1/2W, 2W, 5W, to 10W on the fly as needed. Does this unit provide stereo with pilot? Also, it would be nice to have the ability to inject RDS or other subcarriers into the chip before the RF output.
i really need one of your transmitters
It is a good video, need more detail about the transmitter, I think RF DIY is still a little complex for someone
It depends on a number of factors. One factor is your antenna. A good antenna makes a difference. Ham radio operators can get some pretty impressive distances on VHF FM using low power. It all comes down to the antennas. Dipoles are fine antennas. On the 2 meter ham band J poles are pretty popular. An FM broadcast J pole would be simple enough. Just make sure the antenna is properly tuned so you don't damage the transmitter. I have an MFJ antenna analyzer I use for my ham antennas. (continued)
I really dislike PLL frequency control because I have had bad experiences with it on tuners, but do like that fact it helps with drift and stability. Do you use a BA1404 combo chip and a 19khz pilot crystal for stereo carrier?
good one for a low power pirate station.
This could also be titled "How To Meet A Real FCC Employee Within 24 Hours"
cool
+kevoice lol
+kevoice We constructed a simple fm transmitter for a lab at my university. All I could think about was the FCC techs seeing twenty different signals at the same frequency pop up simultaneously on their S.A.
"How To Meet A Real FCC Employee Within 24 Hours" and than poke him/her in the eye.
kevoice I run all NRG kit built transmitter stereo encoder and I also run 15O watt power Amplifier attenuated down to about 4O watts I also built and designed my own copper J-pole antenna usually used for 2 meter amateur radio I lengthened my elements just enough to make my antenna resonant at 1O7.3 MHz 1O7.3 FM THE PIRATE ... I run all silver soldered tinned rf coils in my low pass filters one on my exciter or transmitter another LPF on the PA. I have a flat match with all forward Wattage covering over 15 solid miles in stereo and very clean... no distortion I also run two dbx-163 compressors limiters.. to keep my audio at an even tempered level...
Re: 6watt rev 2
How stable would you say said circuit is? I'm new to the game, I've built but one transmitter to date and got it working but found that the capacitance was easily swayed any movement would knock it out of tune. PLL does interest me, but I think it may be a tad too advanced for me as of yet.
Would it be difficult to modify for the 2m ham band. It would just need ctcss tones added or am I way oversimplifying it. AC8LZ
Hey nice workshop and info. What is the music at the beginning?
Hi. Agencies in the UK are using some kind of digital transmission radio equipment with a transmitter that is inserted into the top of peoples heads. Nanotechnology is also being used in conjunction which is fitted into ears and over eyes. Do you have an knowledge of this and how can it be tackled. Kind regards.
I was wondering where can I get everything, I know it comes in a package but I want to know where... Thank you
what range can u reach with this transmitter? is it possible to transmit across a whole city? what radius can it reach and how do u increase that aspect?
Wooow... i like this proyect, please how where I get it and how much $$$, thank you
Bom Dia
Qual o valor do kit de eletrônica que você mostra.
Is it possible to get a link to the schematic? How would I disable the pre-emphasis. I am interested in this unit. I may just buy the kit then replace the dip-switches with a micro-controller (arduino or something similar) so that I can change the freq quickly if needed and have the freq on an LCD. Also, can you recommend a el-cheapo deviation monitor? Does this unit have anything to control over deviation, or is it up to the user to run a limiter?
Is this a STABLE DRIFT-FREE transmitter?
If you tune a radio to it's frequency, will it stay on that frequency and not drift off? Does it work
equally well on the old-style ANALOG string-type radios as well as digital FM receivers?
The tiny 2-transistor bug-type FM wireless mics always fall off the frequency and you lose the
signal entirely.
Also, do you need special FCC license to use this transmitter for home office or factory use?
Hmmm not sure what it was. But the only way I could get on was through a proxy. Great job btw
Who's the intro song by? Sound like Aphex, but I don't remember hearing it before.
sir can help me....make the coding softwere PIC or Tiny all other...thank you
czh 7watt can cover than 2miles if you can let the antenna in a high place
I can see that you did not use free air coils or one time only , how you achieved and adjusted the frequency so easily without a lot of coils as usual ?
Pretty sure PRX uses a clip of this video in one of their promo sound clips on the radio.
What about the circuit diagram?
Thanks .
The "howto" section of your site is a blank PhP page :(
Well.. it's not exactly blank, however, it cuts off after the tag.
Apex Twin - Bouncing Ball? Haven't heard that in FOREVER.
Really, what you need to design is a simple AM transmitter that can be built in prison, from AM radio parts. Its been done before by inmates, not hard to do. I wanted to set up a pirate radio station in prison but didn't have my own AM radio to butcher for parts, as I never got shuffled around to one where you could buy it on the store. I suppose I could of bought one second hand but I was thinking more along the lines of a simpler spark gap transmitter, and also, um, just surviving day to day.
how much do you charge for complete kit?
The Problem I have is Monetary as well, I can't just go buy a receiver, I can't afford one. But I am very good at making things and I have a lot of parts because I recycle Electronic boards from old TV's Stereos, etc.. I just need to find a decent Schematic and a parts listing. Then I could build Just about anything.. I also recently bought an Arduino Uno I wonder if that could be of any use. I m still trying to learn how to program it though.. I am just exploring this RF stuff it is learning
How i can make it 100w?
Also, should I use this in Toronto?
Hi there
I tried going to the website given and it seemed to be down. Am I still able to buy a kit?
Thanks
In london, its about getting a secret studio link to the Xmitter site.
hi bro i want open my fm station can you give me a idea
Parabéns
why not a crystal oscillar circuit, with a socket to swap out crystals? A PLL circuit is advanced method. also, is this a phase modulation circuit or a fm circuit? (phase modulation and fm modulation are very similar
Find a commercial UHF mobile/base radio and use that. You could get upto 25watts on something like that, however you should know that audio quality will take a hit because these only run at 12.5khz whereas FM broadcast is 75khz...
sorrym this isn't my site but FYI I put a decent antenna on my rig after my dipole went kaput - basically mine had the standard output screw-on socket and I just screwed my (new) vertical antenna straight in, after checking that the cable soldering was perfect, firstly checked the TX on a dummy load to make sure it was ok, I used a normal Citizen's Band (27MHz) SWR meter to check the Standing Wave Ratio and it was good, about 1:1.15, I had a 7Watt rig but the antenna gave me like 14Watts e.r.p.
is that the tuss im hearing?
hi
i watched your 10watt FM transmitter i like it.
but i need to ask you if your town/city has a powerful station and you tried to transmit on the same frequency how far would you hear your music ??
iam asking because at work the young guys listen to crappy boy band song and i would like to over power them into some nice ACDC!! but then i don't to get into trouble so only about 150feet would do nice to over power them and not disturb other people.
The FCC would come knocking on your door...
Actually depends on how far you're away from the transmitter and how strong their signal is (and of course yours). Let's say you've got a 10w transmitter, then you'll probably not be able to kick off a professional 50kW station, even if it's 40km away from your transmitter.
This is illegal. You can get in huge trouble for doing that.
And?
Blocking another station is the quickest way to get the FCCs attention. The owner of that station will track you down for the FCC.
i get abount 10 miles on my 1 watt ham radio . on low power . from on top of a wind mill
How can you make the chinesse czh 7watt fm broadcast to transmit more than 100meters...?
Where we can contact you Sir?
I want to build my own new fm radio in my country
thank you Sir
Steven, I built one and it is not working - Can I send it to you to debug?
Cheers,
muito bom montei um pll com ba1404 ja esterio
Hi. How to buy only PCB?
We have internet now TY!
How far does its signal travels?
I have a question, how would you find out how many people are listening to the station?
ta muy bueno el video pero traducido al español seria un poquito mejor .
y donde puedo adquirir ese transmisor y cuanto cuesta.
the video is very good but translated into Spanish would be a little better.
and where I can buy that transmitter and how much it costs
How can we increase the broadcasting range. What are the requirements to strengthen our signals for longer communication distances. Please help :)
The best things to do to increase range are either get a more powerful amplifier, get a better antenna (if it's not already tuned to the frequency you would be broadcasting at), and arguably the most important thing is to put your antenna as high up as possible, which will allow the signal to go further.
Hi, I'm pretty much interested about the low powered transmitter which is 10 watts. How much it cost?. I'm from the Philippines, I need this FM transmitters for my small community we don't any FM station in my place. waiting a reply tnx and more Power....
can u put5 a link to your web site and will it work in nsw
Can u please, make a video, I have one FM player mp3 for car`s radio, how can I put a microphone and change it for 9v battery and make a spy fm transmiter from it?
Just do it
Aphex Twin, niice
where can i get this kit?
how many miles can a 7 watt fm cover ?
pode por legenda em português?
if only we could use these in the UK :'(
Hi
I'm just asking, I have a15watt fm transmitter can I take the cable that going to the antenna and connect it to sound amplifier and then take the cable from the amplifier to the antenna so as to boost the signal over this15 watt?
If not how can I increase the signal of the transmitter
Please reply your opinion is appreciated
I'm not an EC geek but to my understanding, the cable going to the antenna carries RF signal, not audio, hence the sound amplifier cannot process or amplify that signal. I tried this some time ago and it did not work. You will need an RF amplifier, not a sound amplifier.
RF Amplifier will do the trick
*****
*****
Thanks for your reply friend
Send video demonstration of this if possible.
It will be nice
gambulgambula is very good ...dilipbhai india
How about to restore freedom. In this great country!????
ITS PLL ,BUT YOU CAN MAKE IT WITH DIGITAL LCD IN ORDER TO READ THE OSCILLATED FREQUENCY...
I rather hear that crazy train than that tacky little music you have here. I like your work man. I assembled a kit in early 90's , a "panaxis" kit at 1/2 watt but I think I like your kit better. I might want to get your kit in time , so let me know if you have any available.
For some reason the "Like" button is not responding so here is my "like".