EF JOHNSON 422AMS4 Ham Radio Roller Inductor 30UH

( Brand: Ef Johnson ), ( Manufacturer Part Number: 422AMS4 ), ( Compatiblebrand: Universal ), ( Type: Accessory )

Review EF JOHNSON Vintage Ham Radio Roller Inductor Part Good Condition

The EF Johnson 422AMS4 30uH Ham Radio Roller Inductor is a high-quality component designed specifically for amateur radio applications. This inductor, with a value of 30 microhenries (30uH), is a crucial part of various radio circuits, contributing significantly to the resonance and impedance matching necessary for optimal signal transmission and reception.

The 422AMS4 is a roller inductor, which means it has a compact, spiral-wound design that allows for a smaller footprint on your circuit board. This design also helps to reduce the overall inductance variation, ensuring a more consistent performance across a wider range of frequencies.

Made by EF Johnson Technologies, a well-respected manufacturer in the ham radio community, this inductor is built to last. It features a durable epoxy coating that protects the coil from physical damage and environmental factors, such as moisture and dust. The coating also helps to reduce electromagnetic interference (EMI), ensuring a cleaner signal and less noise in your radio communications.

The EF Johnson 422AMS4 30uH Ham Radio Roller Inductor is a versatile component, suitable for use in a variety of amateur radio applications, from simple transmitter and receiver circuits to more complex equipment such as antenna tuners and filters. Its compact size, durability, and high-quality construction make it an ideal choice for any serious ham radio enthusiast.

In summary, the EF Johnson 422AMS4 30uH Ham Radio Roller Inductor is a robust, compact, and reliable component that will help enhance the performance of your amateur radio equipment. Its high-quality construction, combined with its compact design and versatile application, make it a must-have for any ham radio operator.

The EF Johnson 422AMS4 30uH Ham Radio Roller Inductor is a popular choice among ham radio enthusiasts due to its high-quality construction and useful features. Let's examine its pros and cons:

1. High-Quality Material: The EF Johnson 422AMS4 is made of high-quality materials, ensuring durability and long-lasting performance.

2. Roller Inductors: The roller inductor design provides easy adjustment of the inductance value to meet specific requirements.

3. Low Loss: This inductor is designed to have low loss, minimizing signal degradation and improving overall performance.

4. Versatile: Suitable for various ham radio applications, from QRP to high power operation.

1. Price: Compared to some other inductor options, the EF Johnson 422AMS4 can be more expensive.

2. Limited Frequency Range: The inductor may not provide optimal performance at extremely high or low frequencies, depending on the specific application.

3. Size and Weight: Given its high-quality construction, the inductor may be slightly larger and heavier than some other options on the market.

In conclusion, the EF Johnson 422AMS4 offers excellent build quality, easy adjustability, and low loss, making it a good choice for ham radio applications where these features are important. However, its price, limited frequency range, and size may be considerations for some users. If budget and size are not major concerns, and you require a high-quality, versatile inductor, the EF Johnson 422AMS4 could be a worthwhile investment. Alternatively, you may want to consider other options that may offer a more balanced combination of price, size, and performance for your specific ham radio needs.

Details:

The bottom line is this. If you do not see it in the photos, is likely included sale. The previous owner had written 30uH in lead near the tuning shaft, so I assume that's technical spec. This EF Johnson roller inductor is in good shape.

That includes manuals, packaging, power cords, etc.

part #: 422ams4 prices

• $39.99-$99.99

specifications radiparaccessori:

• brand: Ef Johnson
• mpn: 422ams4
• compatiblebrand: Universal
• type: Accessory

offer radiparaccessori:

• started: November 8, 2025
• options: Ship-to-home
• availability: In Stock
• quantity: 1
• sold: 0

shipping radiparaccessori:

• class: Standard
• transit: 6-12 Days
• service: Standard
• type: Fixed
• cost: $35.00

returns radiparaccessori:

• policy: Returns Accepted
• time: 30 Days
• paid by: Seller
• method: Money back

payments radiparaccessori:

• wallet: Paypal
• other
• credit card: Mastercard

seller radiparaccessori:

• city: Sparks, Nevada
• # reviews: 26860
• rating: 100.0%

general radiparaccessori:

• Radio Communication > Parts Accessories > Other Radio Communication Accs
• condition: Used

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