Crystal quartz oscillator circuit - 0 views
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Crystal quartz oscillator circuit Another great quartz crystal oscillator schematic with bb139, a 2-nd harmonic quartz crystal and one BF214 transistor. So, the Q quartz is half of the desired transmitter frequency, L1 has 24 turns, 0.08mm Ø built on a 455kHz carcase. L2 has 8-9 turns / 0.8mm Ø / 5mm Ø. This quartz oscillator circuit has a great frequency stability, I’ve build it. Crystal quartz circuit components R1 = 10K R2 = 100
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"Another great quartz crystal oscillator schematic with bb139, a 2-nd harmonic quartz crystal and one BF214 transistor. So, the Q quartz is half of the desired transmitter frequency, L1 has 24 turns, 0.08mm Ø built on a 455kHz carcase. L2 has 8-9 turns / 0.8mm Ø / 5mm Ø. This quartz oscillator circuit has a great frequency stability, I've build it. Crystal quartz circuit components R1 = 10K R2 = 100K R3 = 8.2K R4 = R6 = 820 R5 = 15K C1 = 330nF C2 = 1nF C3 = 1.5pF C4 = 15pF C5 = 2.2nF C6 = 6 - 25pF trimmer C7 = 4.7pF D1 = BB139 D2 = 5.6v zenner diode T = BF214 Q = half frequency quartz crystal Crystal quartz oscillator circuit schematic "
