R2 = 220K
R3,R6 = 100K
R4 = 100 ohm
R5 = 10K potentiometer, (pc mount)
C1,C2,C5,C6 = 0.01microF, ceramic disc
C3 = 100pF ceramic disc
C4 = 4.7 to 10microF, 16WVDC, radial lead electrolytic
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.
Circuit will expand the district, 3-30Mhz = area high-frequency (HF), 3-300Mhz = areavery-high frequency (VHF), 300-3000MHz district ultra-high (UHF) frequency.
Select Allow a Dog When SW 1-a to the amplifier Q1 = a district. high-frequency (HF).
Select Allow a Dog When SW 1-a to the amplifier Q2 = a district. high-frequency (HF)area, and very-high frequency (VHF).
R5 = adjust the gain of the circuit SW2-a, b ON-OFF signal expansion.
Select Allow a Dog When SW 1-a to the amplifier Q1 = a district. high-frequency (HF).
Select Allow a Dog When SW 1-a to the amplifier Q2 = a district. high-frequency (HF)area, and very-high frequency (VHF).
R5 = adjust the gain of the circuit SW2-a, b ON-OFF signal expansion.
PCB
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