Oscillators
UUS 65 - 73 MHz fm transmitter
A basic UUS 65 73 MHz fm transmitter circuit schematic which can be used as uus oscillator with no explanation …
65 - 73 MHz transmitter ( oscillator ) circuit components:
L1 = 8 t / 0.3mm / 6mm
L2 = 8-12 t / 1mm / 15mm / 1mm gap
SRF = 60t / 0.2mm / 3mm / [...]
Crystal quartz oscillator
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 [...]
Quartz crystal oscillator
A very simple crystal quartz oscillator circuit schematic which use a quartz for frequency stability and a good rf tranzistor. Use a 2-nd or 3-rd harmonic crystal , for example if you want 100MHz use a 50MHz or 33.3MHz quartz or if you want use a 4-th harmonic crystal but the output rf voltage [...]
