Description: Graduated Scale Crystal Radio 223p Duplex Variable Capacitor AssemblyCrystal Radio 223p Duplex Variable Capacitor Assembly for Crystal Radio applications and other Radio ProjectsThis Sale is for One Complete Assembly Exactly as Pictured Multilayer PCB 50mm Diameter, 1.6mm ThickNewly Manufactured Circuit Board2 Open Solder Pads One Marked "ANT"-Antenna and One Marked "GND"-GroundBrand New 223p Duplex Capacitor Mounted and Pre-Soldered to the Circuit BoardHigh Quality Matching Color KnobTwo 3mm holes are in the PC Board for Mounting the PC Board Assembly to your project. If you have ever struggled Mounting a 223p Capacitor like I have, this is the ideal solution for any of your DIY Radio Projects. Connect to your circuit using the solder pads on the circuit board for direct connection using your own wires from the circuit board.Since a 223p capacitor is a Dual Capacitor, this circuit board assembly up for sale has an integral connection such that both of the capacitors of a 223p are wired in Parallel to increase the Capacitance Range to as much as 35pF to 235pF. Here are some facts regarding a 223p Duplex CapacitorCapacitance increases with anti-clockwise movement. This variable capacitor is ideal for use in radio circuits such as crystal sets.A 223p capacitor has two separate variable capacitors inside which can be connected in parallel to form one single capacitor of higher value. The middle connection strip is the common ground connection. The two sections have maximum capacitances of 59.1 and 141.6pF and so form a total of 200pF. But the specific range can often vary by manufacturer and can be wider.I’ve measured some newer 223 Capacitors with capacitance range at around:Ca: 18pF to 160pFCo: 17pF to 75pFCombined in Parallel from 35pF to 235pF There are also two trimmer capacitors accessible on the back side internal to this variable capacitor which are used to add a fixed amount of capacitance when used in some designs. Minimum capacitance is when the top semi-circular plate attached to the screw is moved so that the lower static plate is completely exposed.
Price: 19.8 USD
Location: Dakota, Illinois
End Time: 2024-09-24T15:05:25.000Z
Shipping Cost: 7.6 USD
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Item Specifics
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Brand: Crystal Radio Coil
Type: Circuit Board
MPN: RK-7833
