
( Brand: General Instrument ), ( Manufacturer Part Number: 2872B ), ( Type: Variable Capacitors ), ( Country/region Of Manufacture: United States ), ( Base Length: 4 Inches ), ( Shaft Extension Length: 1.5 Inch ), ( Height: 2.75 Inches ), ( Width: 3.25 Inches )
The 2872b General Capacitor is a versatile electronic component that is designed to store electrical energy in an electric field. This specific capacitor model measures 3 x 400 picofarads (pF), with a total capacitance of 1200 pF.
The 3 x 400 pF rating indicates that the capacitor is composed of three individual capacitors, each with a capacitance of 400 pF. These capacitors are connected in parallel, which means they work together to provide a combined capacitance of 1200 pF. This parallel connection allows for a lower equivalent series resistance (ESR), resulting in improved performance and efficiency in high-frequency applications.
The 2872b General Capacitor is a general-purpose capacitor, meaning it can be used in a wide range of electronic circuits. It is a good choice for applications that require stable voltage levels, filtering, coupling, or decoupling. The capacitor's small size and low profile make it ideal for use in compact electronic devices, such as smartphones, laptops, and digital cameras.
The 2872b General Capacitor is rated for a voltage of 1200 volts (V), which means it can withstand a maximum voltage of 1200V without failing. This high voltage rating makes it suitable for use in power supply circuits and other high-power applications.
The capacitor is made of a dielectric material, which is the insulating material between the capacitor's plates. In this case, the dielectric material is not specified in the model number, but common dielectric materials for general-purpose capacitors include polypropylene and ceramic.
Overall, the 2872b General Capacitor is a versatile and reliable electronic component that offers a high capacitance value and a high voltage rating, making it suitable for use in a wide range of electronic circuits. Its small size and low profile make it an excellent choice for compact devices, while its high voltage rating ensures its suitability for high-power applications.
Pros of buying 2872B General Capacitor (3x400 pF, 1200 total):1. High Capacitance: The 2872B general capacitor provides a total capacitance of 1200 pF, which is sufficient for many electronic applications that require high capacitance values.
2. Reliability: General capacitors are known for their reliability and durability, making them a popular choice for long-term use in various electronic devices.
3. Low Leakage Current: The 2872B general capacitor has a low leakage current, which means that it can maintain its charge for a longer period, making it suitable for applications where a steady voltage is required.
4. Wide Operating Temperature Range: The 2872B general capacitor has a wide operating temperature range of -55 C to 125 C, which makes it suitable for use in a variety of environments.
Cons of buying 2872B General Capacitor (3x400 pF, 1200 total):1. Size and Weight: The 2872B general capacitor is a large capacitor, which may take up more space in your electronic device. Its size and weight may also add to the overall weight of the device.
2. Cost: The 2872B general capacitor may be more expensive than other types of capacitors with lower capacitance values.
3. Limited Availability: The 2872B general capacitor may not be readily available in all electronic component stores, which may require you to order it online or from a specialized supplier.
Conclusion:The 2872B general capacitor is a reliable and durable capacitor with a high capacitance value, low leakage current, and a wide operating temperature range. While it may be larger and more expensive than other types of capacitors, its high capacitance value makes it a suitable choice for applications that require a steady voltage and high capacitance. However, it is essential to consider the size and weight of the capacitor and its availability before making a purchase decision.
Recommendation:If you require a high capacitance value and a reliable capacitor for your electronic device, the 2872B general capacitor is a good option. However, it is recommended to compare its cost and availability with other capacitors to ensure that it is the best fit for your application and budget.
Tuning does not feel perfectly velvet smooth, I disassembled cleaned and re lubed which improved it a little, probably would be by some polishing with fine garnet paper. It works nice now, but I would prefer smoother tuning, realize that my testing is being done without a knob which makes seem worse than.
Great for an antenna tuner, amplifier, or other related project. Buyer pays the return shipping.