AIRCRAFT RADIO COMMUNICATION RECEIVER

Aircraft Radio Communications Receiver

The correspondences between business flying machine and the ground can be intriguing, interesting and once in a while notwithstanding exasperating. However radios that get the give or take 220MHz to 400MHz band regularly utilized for airplane (both military and business) are not effectively found. What's more, scanners can be entangled, extensive and extravagant. With a simple to fabricate circuit, for example, this one, everybody can appreciate listening in on these discussions.

Part Total Qty. Description Substitutions R1, R3 2 47K 1/4W Resistor R2 1 10K 1/4W Resistor R4 1 4.7K 1/4W Resistor R5 1 5K Linear Taper Pot R6 1 2.2K 1/4W Resistor C1, C2, C3, C6 4 0.001uF Ceramic Disc Capacitor C4 1 2.2pF Ceramic Disc Capacitor C5 1 1pF Ceramic Disc Capacitor C7 1 15uF 15V Electrolytic Capacitor C8 1 18pF Variable Capacitor D1 1 1N82 Diode Q1 1 2N918 NPN Transistor L1 1 See Notes L2 1 1.8uH Inductor ANT1 1 Approx. 18 Inch Wire Antenna MISC 1 PC Board, Wire, Knob For C8

NOTE ;

The circuit initially showed up in the Think Tank section of the Sept. 1995 issue of Popular Electronics. 

L1 is made by winding 2 turns of 22 AWG magnet wire on a 5/32 bore. This inductor can be adjusted to move the recurrence scope of the circuit. 

The radio wire can likewise be set at the anode of D1 if over-burden is an issue with it joined with the emitter of Q1 

R5 modifies regen and along these lines affectability.