Required Parts
--------------
(1) 2n3904 transistor............................[Q1]
(1) 10k resistor (+-5%)..........................[R1]
(1) 4.7k resistor (+-5%).........................[R2]
(1) 1k resistor (+-5%)...........................[R3]
(1) .001 uf capacitor............................[C1]
(1) 5 to 80 pf variable capacitor................[C2]
(1) 10 pf capacitor..............................[C3]
(2) .5 uh coils..................................[L1,L2]
(1) SpSt slide switch............................[S1]
(1) 9 volt battery clip..........................[B1]
(1) Antenna or antenna wire (3 in. or more)......[A1]
(1) microphone (like one out of a phone).........[M1]
Schematics
----------
--------------*-------------*-------------*-------------*
| | | | |
| | | | | +A1
| | | | L1 |
S1 R1 | C2 | |
| | | | *----
| | | | |
+ | | | L2
B1 | | | |
- | C1 | |
| | | | |
| *-------------*------Q1/-----*------------*
| | \ |
--------* | \_________________C3
mike | |
--------* | |
| R2 R3
| | |
| | |
---------------------------------------------------------
How to operate
--------------
1. Turn on (duh..)
2. Turn the variable capacitor until you are on the station that you want to
use (preferably towards either end, so if they turn on their radio, they
don't get a bunch of audio feedback when they hit your station)