JOHNSON 149-10-1 Air Capacitor 10-250PF

( Brand: Johnson ), ( Manufacturer Part Number: 149-10-1 ), ( Part Type: Air Capacitor )

Review JOHNSON Air Variable Capacitor

The Johnson 149-10-1 air capacitor is a high-performance electrical component designed for various applications where large capacitance and voltage handling capabilities are required. This particular model has a capacitance value of 10-250 picofarads (pF), making it suitable for applications that demand precise energy storage and discharge.

The capacitor is constructed using a robust aluminum housing, ensuring durability and reliability in even the most demanding environments. The aluminum foil capacitor plates are rolled to extremely close tolerances, resulting in a high degree of uniformity and consistency in capacitance values. The plates are separated by a porous ceramic dielectric material, which allows for the efficient storage of electrical charge in the form of an electrostatic field.

One of the standout features of the Johnson 149-10-1 air capacitor is its use of an air dielectric. This design element provides several benefits, including a very high voltage rating, excellent stability, and low power loss. The air dielectric also contributes to the capacitor's large size, as it requires a significant amount of space to effectively store and manage the electrostatic field.

The capacitor's terminals are made of brass, providing excellent electrical conductivity and resistance to corrosion. The terminals are also designed with a threaded connection, allowing for easy installation and removal from electrical circuits.

The Johnson 149-10-1 air capacitor is a versatile component that can be used in various applications, including radio frequency (RF) and microwave systems, power supplies, and test equipment. Its large capacitance range, combined with its high voltage handling capabilities and low power loss, make it an ideal choice for applications that require precise energy storage and efficient energy transfer.

In summary, the Johnson 149-10-1 air capacitor is a robust and reliable electrical component designed for applications that demand large capacitance values, high voltage handling capability, and low power loss. Its use of an air dielectric provides excellent stability and high voltage rating, while its brass terminals ensure easy installation and long-lasting performance.

The Johnson 149-10-1 air capacitor with a capacitance of 10-250pF is a commonly used component in various electronic applications. Here are some pros and cons of buying this particular capacitor:

1. High Voltage Handling: This capacitor can handle high voltages, making it suitable for use in high voltage electronic circuits.

2. Large Capacitance Range: The capacitance range of 10-250pF provides flexibility in designing circuits.

3. Good Stability: The air dielectric used in this capacitor provides good stability and reliability.

4. Low ESR: The low Equivalent Series Resistance (ESR) of this capacitor ensures efficient energy transfer and reduces power loss.

5. Wide Operating Temperature Range: The operating temperature range of this capacitor is quite wide, making it suitable for use in various environments.

1. Bulky Size: Due to its large capacitance range and air dielectric, this capacitor is relatively bulky and may take up more space than other capacitor types.

2. Fragile: The air dielectric used in this capacitor makes it more fragile than other capacitor types and requires careful handling.

3. Expensive: This capacitor is more expensive than other capacitor types due to its large size, high voltage handling, and air dielectric.

The Johnson 149-10-1 air capacitor with a capacitance of 10-250pF has several advantages, including high voltage handling, large capacitance range, good stability, low ESR, and wide operating temperature range. However, it also has some disadvantages, such as its bulky size, fragility, and high cost.

If you require a high voltage capacitor with a large capacitance range and good stability, then the Johnson 149-10-1 air capacitor is an excellent option. However, if you are looking for a smaller, less expensive capacitor, you may want to consider other capacitor types, such as ceramic or electrolytic capacitors. Ultimately, the choice depends on the specific requirements of your electronic circuit.

Details:

In good working order. Needs a light cleaning. A little stiff.

part #: 149101 prices

• $15.00-$128.00

specifications vintacapacitor:

• brand: Johnson
• mpn: 149-10-1
• part type: Air Capacitor

offer vintacapacitor:

• started: December 28, 2025
• quantity: 1
• availability: In Stock
• options: Ship-to-home
• sold: 0

seller vintacapacitor:

• # reviews: 4496
• city: Louisville, Kentucky
• rating: 100.0%

returns vintacapacitor:

• policy: No Returns

shipping vintacapacitor:

• transit: 5-9 Days
• cost: $10.00
• carrier: USPS
• service: USPS Ground Advantage
• class: Standard
• type: Calculated

payments vintacapacitor:

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

general vintacapacitor:

• Vintage Audio Video > Vintage Parts Accessories > Vintage Capacitors
• condition: Used

Johnson 149-10-1 Is Similar To:

• Johnson 167-429-2 Vintage 50 Pf Variable Tuning Capacitor (62.9% similar) About 3.5 inches including shaft by 1.5 inches, 3 ounces. 0.25 inch shaft for knob. 50 Pickford's maximum. Vintage used eff Johnson 167-429-2 air variable capacitor...(May 17th, 2024)
• Johnson 150e30 150 Pf Vintage Variable Tuning Capacitor (60.2% similar) About 5 inches including shaft by 3/2 .75 inches, 12 ounces. Vintage used Johnson 150E30 air variable capacitor. 0.25 inch shaft for knob available on each end. 150 Pickford's maximum...(May 29th, 2024)
• Johnson 12g70 Air Variable Capacitor (78.6% similar) May be new old stock...(June 2nd, 2024)
• Johnson 167-781-3 Air Variable Capacitor (79.5% similar) Sale is for one...(June 2nd, 2024)
• Johnson 100e20 100 Pf Vintage Variable Tuning Capacitor (62.1% similar) About 4 inches including shaft by 2 inches, 7 ounces. 0.25 inch shaft for knob. 100 Pickford's maximum. Vintage used Johnson 100E2 air variable capacitor...(June 3rd, 2024)
• Johnson 167-437-5 Variable Capacitor Ceramic Vintage 2-7 8 Inch Long (55.2% similar) Johnson variable capacitor vintage 167-437-5 approx 2-7/8 inch long excluding end screw...(June 12th, 2024)
• Johnson 165-6-2 Capacitor From Bc-610 1piece (54.3% similar) Sale is for one piece. I bought a box of stuff from fair radio sales before they closed. These are neutralizing capacitors from BC-610 transmitters...(August 4th, 2024)
• Johnson 100r36 Used Ef Air Variable Capacitor 100 Pf Type 1 16 Inch Gap (62.3% similar) Whether you're a collector or an experienced electronics engineer, this Johnson capacitor is great choice. In addition, this capacitor has a 1/16 /- gap, making it versatile item that can be used in variety of applications. Made in the USA, this capacitor is a high-quality item that...(August 10th, 2024)
• Johnson 160-308 Variable Capacitor Ceramic New Old Stock Vintage (55.4% similar) Johnson variable capacitor vintage 160-308 new old stock...(August 18th, 2024)
• Johnson Zuf-14 Ef Variable Air Capacitor Zuf-14.2 Uf (64% similar) With its brand name Johnson and model number eff SUFI-14, this capacitor is a unique find for enthusiasts of vintage audio video. Add this eff Johnson variable air capacitor SUFI-14.2 UFO to your collection today. This eff Johnson variable air capacitor SUFI-14.2 UFO is a great addition to your vintage...(September 17th, 2024)
• Johnson 167-503 Air Variable Capacitor 8-100pf Each Section (74.8% similar) In good shape...(October 25th, 2024)