SKEMA RANGKAIAN AMPLIFIER

MELAYANI PERBAIKAN TV DAN PERANGKAT ELEKTRONIK LAINNYA. ALAMAT JL.RAYA KARANG KEMIRI RT 01/RW 06 PURWOKERTO TELP. 082329735432
Showing posts with label Rangkaian Wireless Microphone. Show all posts
Showing posts with label Rangkaian Wireless Microphone. Show all posts

Saturday, June 11, 2011

Rangkaian Wireless Microphone

Komponen Rangkaian Wireless Microphone

R1 = 10K (brown-black-orange)
R2,R3 = 100K (brown-black-yellow)
R4 = 470 ohm (yellow-violet-brown)
C1,C3 = 4.7pF (4p7), ceramic
C2,C4 = 4.7uF-16V, electrolytic
C5 = 0.001uF (1nF), ceramic
C6 = 470pF, ceramic
Q1,Q2 = 2N2222, NPN transistor
L1 = 1uH, variable inductor
Mic = Electret mike, 2 wires
Couple Notes:
Q1 amplifies the input signal via C4 from the electret microphone.
Q2 acts as an oscillator and the signal coming off C2 is fed onto the base of Q2.
L1/C1 is a so called ‘tank’ circuit and operates in the 88-105MHz band on your regular
AM/FM radio dial.
L1 is a 1uH variable inductor coil to be able to tune it a little bit, and the range of
1uH is approximate.
The antenna can be as simple as a 8″ (21cm) piece of wire of any kind.
source  skema-rangkaian-elektronika.blogspot.com


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