Aircraft Receiver and CB Radio Receiver Circuits...

[gaurav279]

Hi Friends,

I am from India and I would like to construct a Simple Aircraft Receiver Circuit.The circuits that are available on this website are either complicated or the spares are not available in India.Can any one of you please help me find a good circuit with a PCB and component Layouts if possible.Also if possible pleae also suggest me a construction Idea for Citizen Band Radio Receiver.

Any help would be greatly appreciated,


Thanks & Regards,

gaurav
India

[Tomi Engdahl]

Here is one plan as simple as a radio receiver can get. I don't know how good in practice:

Passive Aircraft Receiver
http://www.pcs-electronics.com/schematics/aircraft.pdf

The Passive Aircraft Receiver is basically an amplified "crystal radio" designed to receive AM aircraft transmissions.
The "passive" design uses no oscillators or other RF circuitry capable of interfering with aircraft
communications.

The tuning capacitor may be any small variable with a range from about 5 pF to about 15 or 20 pF. The
0.15 uH inductor may be a molded choke or a few turns wound with a small diameter. Experiment with the
coil to get the desired tuning range. The aircraft frequencies are directly above the FM band so a proper
inductor will tune FM stations with the capacitor set near maximum capacity

Other capacitor and inductor combinations may be selected
to tune other bands if desired. (Try the CB band at 27 MHz.)

The antenna can be a couple of inches if the receiver is near the transmitter or a couple of feet for maximum
range. The selectivity is reduce as the antenna length is increased so best performance is achieved with the
shortest acceptable antenna

[gaurav279]

Dear Tomi,

how to construct 0.15 uH indutor.What SWG of copper wire is used and there are how many turns in it.Also ca you suggest some simple circuits for listening Citizen Band radio signals...Also is there any other alternative link that you can suggest for constructing an Aircraft receiver...

regards,

Gaurav
India

Here is one plan as simple as a radio receiver can get. I don't know how good in practice:

Passive Aircraft Receiver
http://www.pcs-electronics.com/schematics/aircraft.pdf

The Passive Aircraft Receiver is basically an amplified "crystal radio" designed to receive AM aircraft transmissions.
The "passive" design uses no oscillators or other RF circuitry capable of interfering with aircraft
communications.

The tuning capacitor may be any small variable with a range from about 5 pF to about 15 or 20 pF. The
0.15 uH inductor may be a molded choke or a few turns wound with a small diameter. Experiment with the
coil to get the desired tuning range. The aircraft frequencies are directly above the FM band so a proper
inductor will tune FM stations with the capacitor set near maximum capacity

Other capacitor and inductor combinations may be selected
to tune other bands if desired. (Try the CB band at 27 MHz.)

The antenna can be a couple of inches if the receiver is near the transmitter or a couple of feet for maximum
range. The selectivity is reduce as the antenna length is increased so best performance is achieved with the
shortest acceptable antenna

[Tomi Engdahl]

Here are some coil calculator applications that you can use to determine how to make the coil you need:

Air Core Inductor Inductance Calculator
http://www.daycounter.com/Calculators/A ... ator.phtml

Multilayer Air Core Inductor Calculator
http://www.pronine.ca/multind.htm

You can find many links to different radio receivers here:
http://www.epanorama.net/links/radio.html#receiver

Some picks from there:

AM-Receiver for Aircraft communication (118.250MHz)
http://hem.passagen.se/communication/118.html

Single chip builds tiny aircraft receiver
http://www.edn.com/ednmag/archives/1997 ... 0di_03.htm

45-860MHz Radio receiver based on UV916-tuner
http://hem.passagen.se/communication/uv916rec.html

Super Scanner 45-860MHz with 0.01Hz stepsize.
http://hem.passagen.se/communication/supertuner.html

[gaurav279]

Dear TOMI,

This is with reference to your reply posted on the above subject.I would like to inform you that the Trimmer Capacitor of 5-18pF as mentioned in the cirucuit is very difficult to find in india... Instead of this Can we use 2- 20pF Trimmer capacitor which is readily available in India...

Kindly reply at the earliest as our project is on hold because of this...

Thanks & regards,

Gaurav
India

Here are some coil calculator applications that you can use to determine how to make the coil you need:

Air Core Inductor Inductance Calculator
http://www.daycounter.com/Calculators/A ... ator.phtml

Multilayer Air Core Inductor Calculator
http://www.pronine.ca/multind.htm

You can find many links to different radio receivers here:
http://www.epanorama.net/links/radio.html#receiver

Some picks from there:

AM-Receiver for Aircraft communication (118.250MHz)
http://hem.passagen.se/communication/118.html

Single chip builds tiny aircraft receiver
http://www.edn.com/ednmag/archives/1997 ... 0di_03.htm

45-860MHz Radio receiver based on UV916-tuner
http://hem.passagen.se/communication/uv916rec.html

Super Scanner 45-860MHz with 0.01Hz stepsize.
http://hem.passagen.se/communication/supertuner.html

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