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Op Amp Radio


Here is a simple radio that is easy to build and inexpensive. In fact, you probobly have all the parts you need in your junk box. You'll be suprised at the great reception with this little set.

Schematic


This is the schematic of the Op Amp Radio

Parts:


Part
Total Qty.
Description
Substitutions
C11Tuning Capacitor
C210.1uf Disc Capacitor
R1110 Meg 1/4 W Resistor
D111N34 Germanium Diode
U11741 Or Similar Op Amp
L11"Loopstick" Antenna
MISC1IC Socket, Crystal Earphone, Wire, Antenna

Notes:

1. The antenna can be a piece of wire or a telescoping antenna. 18 inches is a good length for in the city.

2. The tuning capacitor is a regular broadcast band tuning capacitor. I got mine from a junked AM radio. I got the loopstick antenna from that same radio.

3. You can change L1 and C1 to recieve differe