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  3. CARDWELL KS-13986L3

CARDWELL KS-13986L3 Air Capacitor 690PF

Ks-13986l3 Cardwell Large Air Variable Capacitor 690pf

( Brand: Cardwell ), ( Manufacturer Part Number: KS-13986L3 ), ( Part Type: Air Capacitor ), ( Country Of Origin: United States )

Review CARDWELL Large Air Variable Capacitor

The Cardwell KS-13986L3 air capacitor is a high-performance electrical component designed for various applications that require large energy storage in a compact size. This particular capacitor has a capacitance value of 690 picofarads (pF), making it suitable for use in radio frequency (RF) circuits, timing applications, and other electronic systems that benefit from fast charge and discharge times.

The KS-13986L3 is a non-polar capacitor, meaning it can be connected in any orientation without affecting its performance. It is constructed using a durable aluminum case, which provides both electrical insulation and mechanical protection. The capacitor's dielectric is air, which offers excellent insulation properties and allows for high voltage operation.

This capacitor boasts a voltage rating of 350 volts, which is a significant feature for its small size. Its low equivalent series resistance (ESR) and low equivalent series inductance (ESL) contribute to its fast charge and discharge capabilities, making it an ideal choice for applications requiring quick response times.

The Cardwell KS-13986L3 air capacitor is also known for its excellent stability and reliability. Its temperature coefficient is relatively low, ensuring minimal capacitance variation with changing temperatures. Moreover, it has a long service life, thanks to its robust design and high-quality components.

In summary, the Cardwell KS-13986L3 air capacitor is a versatile and reliable electrical component with a capacitance value of 690 pF and a voltage rating of 350 volts. Its small size, fast charge and discharge times, and excellent insulation properties make it an excellent choice for various applications in the RF, timing, and electronic systems industries.

The Cardwell KS-13986L3 air capacitor with a capacitance of 690pf is a common choice for various electronic applications due to its high voltage rating and large capacitance value. Let's examine some pros and cons of purchasing this air capacitor.

Pros:

1. High Capacitance: With a capacitance value of 690pf, this air capacitor can store a significant amount of electrical charge, making it suitable for applications requiring large capacitance values.

2. High Voltage Rating: The KS-13986L3 air capacitor has a high voltage rating of 1000V, which makes it suitable for use in high voltage circuits.

3. Low ESR (Equivalent Series Resistance): A low ESR value ensures that the capacitor can discharge quickly and efficiently, reducing power loss and improving circuit performance.

4. Rugged Construction: The KS-13986L3 air capacitor is designed with a rugged construction that can withstand harsh operating conditions, making it suitable for industrial applications.

Cons:

1. Size and Weight: Air capacitors are generally larger and heavier than their electrolytic or film capacitor counterparts with the same capacitance value. This can make them less desirable for applications with limited space or weight constraints.

2. Cost: Air capacitors tend to be more expensive than their electrolytic or film capacitor counterparts due to their larger size and more complex construction.

3. Leakage: Air capacitors are susceptible to leakage over time due to the gradual depletion of the air inside the capacitor. This can result in a gradual loss of capacitance and reduced performance over time.

In conclusion, the Cardwell KS-13986L3 air capacitor offers several advantages, including high capacitance, high voltage rating, low ESR, and rugged construction. However, its larger size, higher cost, and susceptibility to leakage are potential drawbacks.

Recommendation:

If your application requires a large capacitance value and can accommodate the larger size and weight of an air capacitor, the Cardwell KS-13986L3 air capacitor could be a suitable choice. However, if space and weight are a concern, or if cost is a significant factor, it may be worth considering electrolytic or film capacitors with similar capacitance values. Ultimately, the best choice will depend on the specific requirements of your application.

Details:

Looks like 1/4 shaft. Selling a long used Cardwell air variable HV capacitor. Long and heavy, almost 14 to the shaft tip. I measured 90-690pF with my LCR meter and smooth non-binding rotation.

Would be ideal for a wide range antenna tuner project. Looks like a ball bearing support at the shaft end. Selling this vintage used part AS-IS. I would say maybe a 1000 volt rating.

part #: ks13986l3 price

  • $85.00

specifications vintacapacitor:

  • brand: Cardwell
  • mpn: Ks-13986l3
  • part type: Air Capacitor
  • country of origin: United States

returns vintacapacitor:

  • policy: No Returns

shipping vintacapacitor:

  • service: USPS Ground Advantage
  • cost: $21.05
  • transit: 3-9 Days
  • carrier: USPS
  • type: Calculated
  • class: Standard

payments vintacapacitor:

  • other
  • wallet: Apple-pay
  • credit card: Visa

general vintacapacitor:

  • Vintage Audio Video > Vintage Parts Accessories > Vintage Capacitors
  • condition: For parts or not working

seller vintacapacitor:

  • rating: 100.0%
  • # reviews: 1907
  • city: East Amherst, New York

offer vintacapacitor:

  • sold: 0
  • options: Ship-to-home
  • started: May 27, 2026
  • availability: In Stock
  • quantity: 1
part type: air capacitor, country of origin: united states,
category: electronics > vintage audio video > vintage parts accessories > vintage capacitors, sku: 2015141735063892,

Cardwell KS-13986L3 Is Similar To:

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1 offer $85.00 USD
  • Offer #1: $85.00 price + $21.05 shipping estimate = $106.05* total. About 4.5" wide, Possibly removed from a radio transmitter. Looks like a ball bearing support at the shaft end.+$21.05 shipping

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