7/31/2019 Aircraft Radio Communications Receiver
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Airc raf t Radio Com m unic at ions Rec eiver
1. The circuit originally appeared in the Think Tankcolumn of
the Sept. 1995 issue of Popular Electronics.
2. L1 is made by winding 2 turns of 22 AWG magnet wire on a 5/32
drill bit. This inductor can be modified to shift the frequency
range of thecircuit.
3. The antenna can also be placed at the anode of D1 if overload
is a problem with it connected to the emitter of Q1
4. R5 adjusts regen and thus sensitivity.
3 Watt FM Transmitter, 8 Watt Audio Amp, 22 Watt Audio
Amplifier, 50 Watt Amplifier, Crystal Radio, FM Transmitter, Guitar
FuzzEffect, FET Audio Mixer, Microphone Mixer, 8 Note Tune Player,
Op Amp Radio, Mono To Stereo Synthesizer, Electronic
ome > Circuits > Sound/Radio > Aircraft Radio
Communications Receiver
Author Views Views Today Rank Comments
143,505 37 46
he communications between commercial aircraft and the ground can
be interesting, amusing and sometimes even disturbing. However
radiosat receive the approximately 220MHz to 400MHz band commonly
used for aircraft (both military and commercial) are not easily
found. And
anners can be complicated, large and expensive. With an easy to
build circuit such as this one, everyone can enjoy listening in on
theseonversations.
Schematic
Parts
Part Total Qty. Description Substitutions
1, R3 2 47K 1/4W Resistor
2 1 10K 1/4W Resistor4 1 4.7K 1/4W Resistor
5 1 5K Linear Taper Pot
6 1 2.2K 1/4W Resistor
1, C2, C3, C6 4 0.001uF Ceramic Disc Capacitor
4 1 2.2pF Ceramic Disc Capacitor
5 1 1pF Ceramic Disc Capacitor
7 1 15uF 15V Electrolytic Capacitor
8 1 18pF Variable Capacitor
1 1 1N82 Diode
Q1 1 2N918 NPN Transistor
1 1 See Notes2 1 1.8uH Inductor
NT1 1 Approx. 18 Inch Wire Antenna
MISC 1 PC Board, Wire, Knob For C8
Notes
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Stethoscope, Tone Control, Transistor Organ, Stereo Tube
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Comments
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anonymous aircraft communicationAircraft Radio Communications
Receiver Wednesday, January 25, 2012 11:45:58 PM
have a gmrs twoway radio it keys from 110.9 to @36.5 MHz. Will
anybody hear me in a airplane. If they are not to far away my call
is k6cal I amSan Jose CA
Norman (KA1GUK) Aircraft Radio Communications Receiver
Wednesday, August 17, 2011 5:05:40 PM
ne thing I forgot to mention in my previous comment was that the
2N3904 transistor will not work at 400MHz, but the SF245 transistor
used ine Czech circuit will. The 2N3904 transistor will work fine
in the audio stage, however.
Norman (KA1GUK) Aircraft Radio Communications Receiver
Wednesday, August 17, 2011 4:37:48 PM
ease see the circuit at:
http://krysatec.benghi.org/phprs/view.php?cisloclanku=2006033102
It's in the Czech language, but you can translate itnd the
schematic does not need any translation. The ideas of using a front
end buffer and an audio amp stage can help this type of
receiverrcuit quite a bit. I like the circuit on the above website,
but the values of the coil and tuning cap need to be changed to
tune the newer air band.m not sure what else may need to be changed
at this point to accommodate the higher frequencies.
anonymous Aircraft Radio Communications Receiver Monday, March
07, 2011 12:25:51 AM
does really work?
Federico Colombo Aircraft Radio Communications Receiver
Thursday, August 12, 2010 12:53:00 AM
biuld this circuit but I receive no signal (yet)... I used a
2N5179 instead of 2N918. 1N34A instead of 1N82. And a C7 of 22uF
(not 15uF). Theher parts are same as needed. Do you have any
comments about these replaces?. Thank you very much.
anonymous Aircraft Radio Communications Receiver Tuesday, April
27, 2010 12:34:35 PM
built it and works! I replaced 2n918 with a 9018 with a
frequency transition of 1100 mhz! I made L2 with 28 turns of 0,6 mm
wire on 7mm drill bit ,6 cm long. Also a diode 1n34 works fine!
Don Hill Aircraft Radio Communications Receiver Saturday,
October 17, 2009 12:48:32 PM
y research indicates that the 1N82 is a germanium diode from the
fifties. A 1N34 should work as a replacement. A normal silicon
diode will notork well as a Germanium diode has a 0.3V forward drop
and a silicon diode has a 0.7V forward drop.
anonymous Aircraft Radio Communications Receiver Wednesday, July
29, 2009 5:40:37 AM
oes it work?
1s4 Aircraft Radio Communications Receiver Friday, July 17, 2009
9:24:00 PM
r air band i am using a 3.5 turn coil of wire on a 3/8 in. coil
form the wire is 22ga.
mohammed shafeeq.p Aircraft Radio Communications Receiver
Tuesday, July 14, 2009 1:07:34 AM
really fantastic opertunity to see this circuit & to create
it
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