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Circuit Archives
Radio/ Transmitters
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Wireless
Microphone
Reprinted with permission
from Rudolf Graf.
For this and over 1000 other electronic circuits, review and order Rudolf
Graf's Encyclopedia of Electronic Circuits on CD-ROM Vol-1
McGraw-Hill ISBN0078528119
FD103-2 |
Description: Wireless Microphone
Q1 amplifier the
output from an electret microphone MiC1. Audio is fed into oscillator Q2, which modulates
the signal. L1C1 is a tank circuit for operation in the 88-MHz region. The antenna is a
6-to 8-inch piece of wire. L1 is a variable inductor in the 1-mH range. (Reprinted with
permission from Popular Electronics, 8/89, p.27. Copyright of Gernsback Publications,
Inc., 1989.) From figure FD103-2
of Encyclopedia of Electronic Circuits on CD-ROM Vol. 1.
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