FM功率放大器电路〔准备做个100米发射器，收集资料中……〕

社建电子

Assemble by soldering the comp ON ents to the pads indica te d. Keep coil, resistor , and capacitor lead s as short as possible. The coils should be 3/16"to 1/4" above the board and separate tur NS by one w IR e diameter. Bend leads to form a little mounting foot for soldering to the circuit board. Tuning and power output are affected by the di ST ancebetween the coil turns, you can make fine adjustments by either spreading or compressing the coil slightly. The area surrounding the pads is ground. C2, C3, C4, C6, C7, C8, C9, C10, L2, and R1 are solderedat one end to ground as well as the shield braid on the coax cable s. Bolt Q1 to a small heat sink or the chas SIS with heat sink thermal compoundor gray thermal pad underneath the tab. With an input level of 200-500mw, you should see an output of 5-6 watts. Be sure to have a proper dummy load (50 ohms) or tuned antenna connected to the output, doing otherwise will likely destroy the transistor .
Part s List
Quantity
Description
Part Number (s)
2 470 pF mica capacitor C1, C5
1 75 pF mica capacitor C2
1 39 pF mica capacitor C3
1 12 pF mica capacitor C4
2 0.001 uF disc or monolythic capacitor (marked either 102, .001, or 1n) C6, C8
2 0.1 uF disc or monolythic capacitor (marked either 104, .1, or 100n ) C7, C9
1 10 to 22 uF electrolytic capacitor (observe correct polarity) C10
1 1 turn #18 tinned copper, 1/4" dia. L1
1 1 uH inductor, blue lumpy item L2
1 2 turns #18, 1/4" dia. L3
1 7/10" #14, hairpin L4
2 5 turns #20, 1/4" dia. L5, L6
1 56 ohm resistor with ferrite bead over lead at the base of end of Q1 R1
1 2SC1971 RF transistor Q1
2 SO239 socket
2 banana plug (1 each red and black)
2 banana socket (1 each red and black)
1 ferrite bead
4 4-40 nuts
4 4-40 bolts
RG174 coaxial cable
hookup wire
soldering lugshttp://www.dzsc.com/dzbbs/uppic/200706141648181261.gifhttp://www.dzsc.com/dzbbs/uppic/200706141648182704.gif

社建电子

http://uphotos.eepw.com.cn/fetch/dianlut3/200912221112482355.jpg
这里还有一个30瓦的：
http://www.elecfans.com/article/88/131/120/2009/20091222142478.html

sblinux

15W的，一公里都不止吧

zwxzj

这都属于丙类RF放大电路，需要足够的前级推动功率的。

zwxzj

斯巴达开幕，最好先不要玩这个，否则无委会会找你麻烦的（我90年代切身经历过，当时学校用于课堂教学的无线传输设备都让国家安全局特工没收了，他们是根据RF射频电路元器件供应商的售货记录一路追根溯源查过来的，我当时是买的福建泉州一家电子元器件供应商的末级C1971及其前级的几只晶体管）

zwxzj

设建下面的那个电路，如果用漆包线一圈接一个小灯泡，射频功率都可以点亮的。

king7401

这玩意我也试过，滤波没搞好，功率太大了，把几个邻居的电视天线放大器都挂了

199003326

这东西最好别玩，小心惹事上身。

mzzmd

100米,用个9018就行了。

jimmy_xt

FM波段还是别随便玩。
超小功率除外（那种MP3发射器，无线耳机之类的）。