From #1 TV RF Power Amplifier 14W
BIAS CIRCUIT
Below is the RF power amplifier's components part list and bias circuit for supply feeding.
C1, C2, C4, C5, C6 = 1nF LCC Chip + 10nF LCC Chip
C3 = 100µF Sprague
C7 = 10µF Sprague
D1 = 1N 4001
L1, L2 = 5 Turns , Diameter 0.5 mm, W Diameter 3mm
P1 = 1k.
R1 = 56 ohm/ 1/2W
R2 = 5600 ohm, 1/2W
R3 = 2.2 ohm, 3W
R4, R5 = 56 ohm, 1W
R6 = 4,7 ohm, 1/2W
T1 : BDX 54 B/BD139
Printed Circuit Board
you can Click image for enlarge and see more deatil of printed circuit board and component layout.
See more : PLL Transmitter - Audio Video RF Modulator - UHF TV Power Amplifier
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