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gupta
Joined: 12 Dec 2004
Posts: 19
Location: karachi, pakistan
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 12 Dec 2004 8:03 FM receiver |
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| i want to build up an FM receiver with sharp frequency adjustments. plz tell web links having simple circuit ideas.
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arunragavan
Joined: 01 Jul 2004
Posts: 486
Helped: 21
Location: India
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| 12 Dec 2004 15:09 Re: FM receiver |
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An FM regenereative receiver using a single FET and one audio amplifier IC
am uploading a gif which contains the ckt details.
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rx5
Joined: 26 Oct 2004
Posts: 130
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| 14 Dec 2004 3:43 FM receiver |
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arunragavan
hi!
is the sensitivity of this FM reciever same as commercialy available FM recievers??
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platonas
Joined: 14 Aug 2004
Posts: 165
Helped: 5
Location: Universal Citizen
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| 14 Dec 2004 7:14 Re: FM receiver |
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You may consider the TDA7000 or TDA7010 IC which is an FM receiver. The second is SMD. Search the web for the datasheets, I think is made by National.
It is also available from Farnell.
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Hamidzia
Joined: 17 May 2004
Posts: 47
Helped: 2
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| 14 Dec 2004 9:25 Re: FM receiver |
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Assalam O Alekum !
Following attachment contains
FM Definition
Explanation with Figures
A circuit diagram for FM Modulator
Demodulation Concept
Several methods of Demodulation
Circuit diagrams of different Modulators
Mathematical as well as theoretical explanation of each circuit
Interference in FM
Causes
Remedy
I hope this will help u.
Regards
Hamid
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ex4
Joined: 28 Dec 2004
Posts: 126
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| 28 Dec 2004 5:49 Re: FM receiver |
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from my experience, using tda7000 is quite unpleasant since it is not so good in reception.
so i made my own rx fm using FM Tuner and IC LM1260 and it is very good and stable in reception.
try it
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metal
Joined: 21 Dec 2004
Posts: 366
Helped: 13
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| 29 Dec 2004 5:32 Re: FM receiver |
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Hello
You can use this link v:
http://braincambre500.freeservers.com/acameo.htm
Bye
Added after 8 minutes:
Hello
Go to http://web.telia.com/~u85920178/
choose receiver circuits, and then TDA7000 RX.
I built this one myself too, it works good, but the telescopic antenna has to be a good one, and the power supply should be well regulated.
If you build it, let me know, because some problems that are easily solved will appear, on my side, I solved them all.
Regards
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Code Warrior
Joined: 30 Dec 2004
Posts: 225
Helped: 7
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| 30 Dec 2004 18:22 Re: FM receiver |
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I am intrested in FM Rx of freq. 144 to 146Mhz. Is there any one who have circuit.
Regards.
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Borber
Joined: 01 Jan 1970
Posts: 1492
Helped: 112
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| 30 Dec 2004 19:48 Re: FM receiver |
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| For 2m band (144-146MHz) you should search radio amateur pages they have different projects about 2m receivers.
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braincambre500
Joined: 21 Dec 2005
Posts: 8
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| 21 Dec 2005 5:39 Re: FM receiver |
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Hello my friend,
Yes, my name is Patrick Cambre and I have a website at...
http://braincambre500.freeservers.com
I have two 3 FM receivers you may want to study and look at...
One is a superregenerative FM receiver that could possibly get up in the 150MHz range. But you would have to experiement with that.
Another is a Philip's TEA5711T FM receiver that is a heterodyne receiver.
Another is the TDA7000 chipk, made by my friend, Sir Pedro.
Should you need more help on any of the units, do drop me a line, my friend!
A Merry Christmas and a Happy New Year!
Patrick
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wonbef
Joined: 13 Oct 2004
Posts: 191
Helped: 3
Location: Nanshan, Shenzhen
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| 22 Jun 2006 8:02 Re: FM receiver |
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| about fm voice transmitter?
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rjlaforteza
Joined: 10 Sep 2006
Posts: 2
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| 15 Sep 2006 17:18 FM receiver |
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| thank you very much....
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Liz7757
Joined: 27 Sep 2006
Posts: 1
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| 27 Sep 2006 1:08 Re: FM receiver |
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| I was also looking for some help on an FM Receiver circuit, and I would like to say that this thread has helped me very much. Thank you all!
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aza_chomey
Joined: 29 Sep 2006
Posts: 1
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| 29 Sep 2006 6:16 Re: FM receiver |
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i was also for some help on an FM Receiver circuit and all the stuff to build the project of fm receiver.. plz help me..
Added after 7 minutes:
| aza_chomey wrote: |
| i was also need for some help on an FM Receiver circuit and all the stuff to build the project of fm receiver.. plz help me.. |
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Abu Ammora
Joined: 13 Jun 2005
Posts: 142
Helped: 3
Location: East Coast
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| 29 Sep 2006 15:06 Re: FM receiver |
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| metal wrote: |
Hello
You can use this link v:
h**p://braincambre500.freeservers.com/acameo.htm
Bye
Added after 8 minutes:
Hello
Go to [url]h**p://web.telia.com/~u85920178/[/url]
choose receiver circuits, and then TDA7000 RX.
I built this one myself too, it works good, but the telescopic antenna has to be a good one, and the power supply should be well regulated.
If you build it, let me know, because some problems that are easily solved will appear, on my side, I solved them all.
Regards |
OK , The problem faced me is that when moving the ct the quality of receiving goes bad , i want to know the reason ?
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katkat911
Joined: 25 Oct 2006
Posts: 1
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| 25 Oct 2006 9:49 Re: FM receiver |
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| thanks for the files
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maksya
Joined: 02 Jun 2005
Posts: 172
Helped: 13
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| 25 Oct 2006 20:18 FM receiver |
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Look at FM-receiver chip Si4700 at
http://www.silabs.com:80/tgwWebApp/public/web_content/products/Broadcast/Radio_Tuners/en/Si4700-01.htm
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rbli
Joined: 29 Jan 2007
Posts: 1
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| 30 Jan 2007 0:04 Re: FM receiver |
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A good explanation of the regenerative receivers with schematics:
http://www.zen22142.zen.co.uk/Circuits/rf/marr.pdf
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govi
Joined: 17 Mar 2007
Posts: 1
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| 17 Mar 2007 13:55 FM receiver |
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| pls send me the FM reciever circuit diagram i am a ENGG student i wish to do a project so pls do it sir if u send this mean i am very thankfull to u
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llllgh
Joined: 03 Nov 2006
Posts: 1
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| 20 Mar 2007 9:37 FM receiver |
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| new si4702b Fm receiver is a good digital FM receiver IC. able to modulate RDS signal
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mmmm_mmmm
Joined: 26 Mar 2007
Posts: 1
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| 26 Mar 2007 20:04 Re: FM receiver |
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hi i saw some fm recievers circuit but i don't understand ho i wrape the coil and if is there any difference if i wrapped around a pencil or an iron core?
thank you:D
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mmmm_mmmm656
Joined: 18 Oct 2006
Posts: 9
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| 26 Mar 2007 20:09 FM receiver |
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| sorry but can anybody give me a link icludes how we select the frequency at the reciever by hardware citeria if possiple....
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ggggarabic
Joined: 13 Apr 2007
Posts: 1
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| 13 Apr 2007 21:46 Re: FM receiver |
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Considering the winding core (air or iron ) ,the core of the coils changes its inductance so much , so you have to do the coil with the core mentioned in the circuit, the no. of turns is also so important but the spacing is not as you can change it later using wooden or isolating material during the operation of the circuit, to tune/fine tune the circuit , wishing this might help 
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lgldonkey
Joined: 20 Mar 2007
Posts: 2
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| 18 Apr 2007 2:46 FM receiver |
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| thanks
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Meridian
Joined: 19 Apr 2007
Posts: 319
Helped: 17
Location: Ontario, Canada
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| 19 Apr 2007 16:02 FM receiver |
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Or you could use a good equivalent for the MPF102. See below.
Industry Number : MPF102
NTE Device Number: NTE451
JFET-N-CHAN, UHF/VHF AMP,TO-92
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mehrasad
Joined: 26 May 2007
Posts: 7
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| 26 May 2007 14:20 FM receiver |
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| thanku very much
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mehrasad
Joined: 26 May 2007
Posts: 7
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| 27 May 2007 21:26 Re: FM receiver |
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| hi thanx 4 the help
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mehrasad
Joined: 26 May 2007
Posts: 7
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| 30 May 2007 16:09 Re: FM receiver |
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| thnk you
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jaya000
Joined: 02 Jan 2007
Posts: 141
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| 30 May 2007 16:45 Re: FM receiver |
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| the fm receiver circuit must hv pll tuning circuit for stability. Select any ic as suggested above that hv good sensitivity.
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neggar_8051
Joined: 18 May 2007
Posts: 12
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| 01 Jun 2007 20:10 Re: FM receiver |
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| See www.electronicsforu.com
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