How To Build An FM Transmitter: Season 20 Episode 9

[iffy44]

Ever hear of a clip on microphone? Kinda need two hands for this i would think

[DemoScener]

No offence but the way you're building your bug (unfiltered crap) is totally againts the rules of DIY RF, the legs of your components should be short as possible else they're going to function as an antenna.

[notvalidcharacters]

Wow, thanks for injecting the absolute worst song ever recorded. Now I gotta go wash my ears out.

[Exterminance]

This would probably be better if it included audio instructions.

[Bluefmmusic]

This is my fm transmitter - youtube.com/watch?v=Oq3qcxK5ne­o&context=C30187abADOEgsToPDsk­LcoyQZiZLY3G1ZbkJhbAwk

[tbsys31061]

*music

[tbsys31061]

nice musik in the background :)

[MediaHoax]

This is called an FM Bug and not an fm transmitter.

And you have to shorten the leads on all parts. In this video they are way too long !

And a real transmitter always has a filter on it.

Just some tips.

[hjfddfjdchkdchbxc]

fuck off napoleon dynamite

[cappaculla]

Lose the itro guys (awful) and the background music.

[gothicrealm9]

So it broadcasts in mono, how about stereo? Site has Logon...worthless to the rest of us. Get rid of the Introidiots, and the music.

[MoonNuggetFilms]

I'm sure this is a good circuit but shut that music the hell up. Also, talk louder.

[david99soad]

is it possible to give the schematic diagram? so that i can study better about telecommunications at college...

[giocampo1994]

WTF!??!! hoe.

[DJcrazyS]

super powerless transmitter ! :D i mean...where the wreck is the transistor lool,in my country is dangerous to transmit with more than 5 watts transmitter.tried it myself and got into trouble.still....without transistor this is -_-

[jsmbc101]

Has anyone tried this to verify it works?

[specialhitech]

FM transmitter with a large antenna is not worth anything.

a transmitter pen, I put a video for specialhitech

[Harryccengland]

What frequency dose it broadcast on?

[chinobright]

nice 

[s1lv3rst3inisemo]

intro dude could make a sweater with all the wool on his head

[AliceBralice123]

where can you get all the things you need ??? please like RT an list or something :)

[eMDiMA]

PoodleHead? 

[skylinevspec000]

dear Americans, its pronounced Sol  der

not sodder

u dont even spell it sodder. I understand aluminium vs aluminum but not solder..

[T4G0E]

@skylinevspec000 Dear moron, he's Canadian, not American.

The L in solder is silent. Like the S in island. Deal with it.

Also, it kind of ruins your credibility as a language authority when you don't even know how to use punctuation or capitals, or how to spell the word "you".

[beelze18]

@skylinevspec000 In different languages some letters in some words become silent, Your just trying to eradicate english as a dumb language. there is no such thing as an inferior language, just multiple ones that have their ups and downs. If you check Wiki and a World dictionary it will state American; Sader,

[marioaleal]

LOOK AT THOSE...

[ashokkoka]

how can i see thi video

[ThePrudhviram]

PLEASE TELL ME THE CIRCUT DIAGRAM AND STEPS PLEASE.......

[ThePrudhviram]

PLEASE TELL ME THE CIRCUT DIAGRAM

[SuperMusicmania123]

This is a great idea. Could you please send me the instructions step by step because in setting a station up in my shed please get back

[Riddell042168]

Could you use a normal blank circit Board?

[renekenshin6573]

are you sure that's a mic your using there? -_-

[TheXXSCOPEDXx]

RSVP The copper coil, how long would it be if stretched out and not coiled so i know how long??

[pocholox8]

isnt this Tetsuo kogawa's fm transmitter design?

[persarian1]

nice boobs :D

[thecookieman3000]

Really shitty wiring.

[thewii552]

and what is the schematic?

[deymer214]

i think they did that on purpose... it's ok though, i like a good challenge. i'm having fantasies about driving down highways blasting timy tim, or just following one guy around broadcasting on all channels playing the most annoying sounds i can find until he gets out of his car and goes completely insane! <3 thx guys, great video!

[deleteallusers]

The background music is a poor idea. It is a distraction it prevents

focusing on the presentation. I had to watch several times because

the background music interferes with the verbal communication.

It's just a poor idea to do that. It's not smart.

[mondays89]

Would I need special licensing from the FCC to use his? Also would I be able to pick this up on my radio and what frequency would it be found at?

[onelovesam]

I want to build my own low power fm transmitter as a practical am a full time electronics student. i need assistance from the circuit diagram and components needed.

[thomas242007]

hahaha the blond guy is a nerd looks like langley from the lonegunmen

[Xantophia]

Leaving those HUGE lead wires is way to wrong, when you are playing in the VHF range. YO6KNF

[pltom55]

What frequency does it broadcast?

[luqddevil]

What a mess!!!

[camelsat1]

your sound sucks

[zac856314]

HOW ABOUT AN AUDIO AMP SO I CAN HEAR YOU

[ExtraTerrestrials]

@zac856314 lol good 1

[zacharykelaty]

@zac856314 op-amps.

[SSNK101]

I couldn't follow because of the background music...

[nickf244]

please, kill the music!

play something like maybe Kesha instead

[cosmos180]

what a crapy tx my god pfff that you building there i am pleased that i am not living in youre neigberhood

[tenochtitlan51582]

where can i buy the resisters and the coper board??

[Oster910]

theirs also a way simpler way, take an exact o blade walk into best buy look for the FM transmitter, simply cut your way around the transmitter then just take it out put it in your sleeve, and walk out but i do enjoy making things so this is also helpfull

[puffadder01]

could someone post the link. I cant hear what he is saying over the music.

[shooterman40]

where can i get these items 

[855h0le]

omg..put the link in the sub! Also- how do u tune this thing? Its a VERY VERY Broadband if that..

[Thetruthishere11]

turn off the stupid music and give him a mic.

[trill5thefif]

how do you control what frequency you broadcast on?

[Nasuko7]

Sorry, but this isn't a transmitter. This is a RECEIVER. It's blatantly obvious. A transmitter TRANSMITS a signal. A receiver RECEIVES a signal.

[thelordsam]

please can you explain the equipment that required & what you need to make like this ?

[helliviknow]

wow! screech went blonde! lol

[TheKeithProject]

Is there a circut diagram for this, and will this work that an Ipod?

[Mrosadofe]

whats the web like that you gave again? i could hear it well, Thank you

[radiorob007]

On this same way I started with pirate radio when I was 13 years old!

Also in a tin box like this!!! (I've had a lot of fun with it!)

RadioRob.

Rob.

[mapleguy1029384756]

Wow at least etch the pcb. That piece looks so bad

[jotalink]

what s the radious of reaching in this transmiter?

[PhattyMo]

For stability's sake,trim the component leads!!

In every video I see of people making the T.K. transmitter,they leave the leads 9 miles long..

[hitachi088]

Ohh my god ! yes ! cut it off !

[MrTelefant]

wow the music in the background... pffff... really annoying... to much gain also!

[LauxHawk]

@MrTelefant You don't get it. Video killed the radio star is the song. =P

[MrTelefant]

@LauxHawk yeah... i know, but i meant i wanted to listen to the guy, not to the song! this annoys me, cuz it catches the attention

[takforalt]

@MrTelefant ditto

[lurdk]

how long does would the battery last on one of these things?

[jaymantube]

what station would it broadcast to?

[CmdrTobs]

Depends on the values of that coil. More turns move you down stations less turns up.

The same with compressing it slightly or stretching it slightly.

[isata88]

how do I create one with at least a 926 MHz frequency?

[CmdrTobs]

Are you sure you mean 926Mhz rather than 92.6Mhz

If 926Mhz (duno what you want that freq for) you need a high frequency transistor. Something like a BF199, then the coil and tuning cap will have to be adjusted using the equation. 1/(2*pi*SQRT(L*C)) = Frequency.

If that made no snense. Too you then you got some reading to do.

Google 'LC' circuits for a start. Also some basic physics on capacitance and inductance and units will be very useful if you lack it.

[isata88]

i have a Sennheiser RF 110 transmitter that I was trying to recreate. and it requires 926 MHz.

[CmdrTobs]

Ah ok. That thing would have a PLL much more complex than what is here.

I also doubt the single transistor modulation method as shown here will be too successful at that freq. Also this method produces sound with a bad audio response too...+ no stereo.

Also the sound reproduction *might* be digital on on the 110.

Unless you know a lot about electronics and already have all the equipment to produce a good PCB and experience to soldier it, it would be cheaper to buy a new base unit by far.

[isata88]

I wish. They wouldn't even mail me a schematic to finaggle it on my own. Maybe If I take the PCB to a local service firm, they could recreate a miniature version of it.

[CmdrTobs]

Some of the chips like the PLL stuff will have programming on there. So even if you did recreate the circuit you got programming to do. If the base is broken rather than just lost its probably something very simple like the power supply.

If you really want you own RF headphone system then start with something like this circuit here then buy a set of comfortable head phones and build a basic FM receiver into them. Could be done for £10 + the cost of the headset.

[isata88]

Well, I have the headphones already. If I could take out the system already made for the 926 MHz and swap them for the FM frequency, that would be great. Then I can either buy or make a FM transmitter.

I just wanted to mimic the 926 MHz transmitter because the headphones were already set to receive that frequency.

[CmdrTobs]

Yeah sure, you can just use the speakers in the 110 headphones. Though the amount of work required to reproduce the base unit is staggering if you are not an expert.

[Gello81]

solder not soldier.

[CmdrTobs]

Christ. You did not just do what I think you did, did you?

[relat4u]

hey...nice video..!!

but just tell me how did you join the stereo audio cable..coz it has 2 wires each having 2 wires??

[bocatablanco]

Where could i hace this schematic?

[pinkxvenom]

chris is so cute! haha :]

[IWANNABEFAMOUS15]

where can i get a transmiter for 60 miles

[joker71496]

ebay but the FCC will get super pissed lol

[CmdrTobs]

60 Miles in the FM band (88.6Mhz - 108Mhz) is near impossible to achieve.

[IWANNABEFAMOUS15]

what do i need to transmit like 30 40 miles

[sypha0x]

an amplifier

[bonecrime]

Nothing that you can make yourself.

[killeninicent]

what frequency does it transmit on? plz answer

[GreenDay3366]

between ca. 80 and 110 MHz

[dodok001]

WTF!!! i cant hear anything that ur saying dude!!

[dazaro3]

This will NOT work ,there is no transistor! ,how can a transmitter work without a transistor?

[djgiggscom]

Actually your wrong, this is the most crapest and cheapest, therefore the most simplest transmitter design. The transistor is only on high quality transmitters which need a certain output in watt or milliwatts.

[dazaro3]

I know ,its just a RF oscillator

[texasking1117]

looks like screech from saved by the bell and napolean dynamite mixed

[mu86neer]

sound system is too poor..plz try to enhance te way you present ,,, thanks

[Amishman35]

This smells too much like how to make a high-def speaker for under a buck.

[bootnecklad]

look up broadcast your podcast. I'll go find the bits for this and make it, i'll reply to this with a video response.

[dhunragh]

she is hot man

[2steppa]

Where's the semiconductors in this transmitter? IE: The output transistor? Where does the antenna connect, surely closed in a metal altoids tin the RF won't escape without an external antenna?? Hmmmm.... interesting.

[mike20021969]

the transmitter looks like a piece of junk to me.

i'll stick to my veronica fm kit.

[cupnoodles2]

u adjust the radio not the transmitter xD

[mike20021969]

he was asking how you adjust the frequency it transmits on.

[cupnoodles2]

i like they way u make ur boards ill try it. cool fm transmitter do u have any schematic?

[darraghahern]

how do u adjust the frequency...nd how many watts is it

[cameronleeb]

this was a pretty good video helps a whole lot you guys know what you are doing

thanks alot