怎么做到的?要是自已做一个,改改电容电感,那就可以听到对讲机发出的信号了。
l - 4 turns #18 copper wire, 12mm inside diameter, tapped at 2.5 turns
ant - 7 inches of #18 bare copper wire
c1 - 18 pf ceramic capacitor
c2 - 50 pf air variable capacitor
d - 1n34 diode or rock crystal
r - 150k resistor