Sabtu, 17 November 2012

Active Antenna AA-7 HF/VHF/UHF, 3-3000MHz

Parts List and other components:
 
Semiconductors:

Q1 = MFE201, SK3991, or NTE454. N-Channel, dual-gate MOSFET (see text)
Q2 = 2SC2570, NTE10, NTE107. NPN VHF/UHF silicon transistor (see text)
     Note: If you use the NTE107 as a replacement, make sure to insert it correctly 
     into the pcb.  The orientation is different than as shown on the parts layout
     diagram. (e-c-b seen front view for NTE107).  See this Data Sheet


Resistors:
All Resistors are 5%, 1/4-watt
   R1 = 1 Mega Ohm
   R2 = 220K
R3,R6 = 100K
   R4 = 100 ohm
   R5 = 10K potentiometer, (pc mount)

Capacitors:
C1,C2,C5,C6 = 0.01uF, ceramic disc
         C3 = 100pF ceramic disc
         C4 = 4.7 to 10uF, 16WVDC, radial lead electrolytic

Additional Parts & Materials:  
   B1 = 9-volt alkaline battery
S1,S2 = DPDT PC mount pushbutton switch
J1,J2 = PC mount RCA jack
 ANT1 = Telescoping whip antenna (screw mount)
 MISC = PCB materials, enclosure, enclosure, battery holder and connector, 
        wire, solder, etc.
    

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