airband prijemnik 220mhz to 400mhz band

Airband prijemnik 220MHz to 400MHz band

Airband prijemnik 220MHz to 400MHz band

The communications between commercial aircraft and the ground can be interesting, amusing and sometimes even disturbing. However radios that receive the approximately 220MHz to 400MHz band commonly used for aircraft (both military and commercial) are not easily found. And scanners can be complicated, large and expensive. With an easy to build circuit such as this one, everyone can enjoy listening in on these conversations.

PartTotal Qty.DescriptionSubstitutions

R1, R3247K 1/4W Resistor

R2110K 1/4W Resistor

R414.7K 1/4W Resistor

R515K Linear Taper Pot

R612.2K 1/4W Resistor

C1, C2, C3, C640.001uF Ceramic Disc Capacitor

C412.2pF Ceramic Disc Capacitor

C511pF Ceramic Disc Capacitor

C7115uF 15V Electrolytic Capacitor

C8118pF Variable Capacitor

D111N82 Diode

Q112N918 NPN Transistor

L11See Notes

L211.8uH Inductor

ANT11Approx. 18 Inch Wire Antenna

MISC1PC Board, Wire, Knob For C8

1. The circuit originally appeared in the Think Tank column 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 the circuit.

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.