REGENERATIVE SHORTWAVE RECEIVER
The circuit design utilizes #22 hook-up wire for the windings, ensuring a reliable and effective connection for the inductive components. The coil numbers serve as designated connection points to the FAR Circuits printed circuit board (PCB), facilitating straightforward integration into the overall circuit.
The circuit operates on typical voltages derived from a 9V battery, providing a stable power source for the components involved. Capacitors C3 and C5 are specified as three-gang variable capacitors with a capacitance range of 10-60 picofarads (pF) per gang. This design allows for flexibility in tuning and adjusting the circuit's performance, with the option to substitute various capacitor models as needed.
The coil form is constructed using a common 1.25-inch outer diameter (O.D.) plastic pill bottle, which serves as a convenient and effective housing for the windings. The length of the bottle should be at least 2 inches to accommodate the necessary coil turns. The winding configuration is critical to the circuit's function, with L1 consisting of 5 turns, L2 consisting of 18 turns, and L3 consisting of 3 turns. It is imperative that all windings are positioned closely together and wound in the same direction to ensure proper inductance and minimize interference between the coils.
This schematic emphasizes the importance of precise winding techniques and component selection to achieve optimal performance in the circuit application.Use #22 Hook-up Wire forWindings. Numbers on coil are connection points to the FAR Circuits PC board.
*Voltages shown are typical values using a 9V battery. C3,C5 are three gang variable capacitor 10-60pF/gang. Many substitutes are possible. COIL FORM is 1.25 Inch O.D. Plastic Pill Bottle 2 Inches or longer L1 is 5T L2 is 18T L3 is 3 turns All windings are close together Wind all in same dirrection.
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