1. Ham, Amateur Radio Communication For Sale
  2. sku: 13781912998612892
  3. PI AIR DUX 2007A

PI AIR DUX 2007A Tank Coil Ham Radio Amplifier

2007a Pi Air Dux Tank Coil For Ham Radio Amplifier

( Brand: Pi Air Dux ), ( Manufacturer Part Number: 2007A ), ( Type: Ham Radio Amplifier ), ( Compatible Brand: Universal ), ( Country Of Origin: United States )

Review PI AIR DUX 2007 Tank Coil Ham Radio Amplifier

The **Pi Air DUX-2007A Tank Coil** is a meticulously engineered, high-performance component designed specifically for enthusiasts and professionals operating high-power amateur radio amplifiers, particularly those built around the legendary **Pi Air DUX-2007A** linear amplifier platform. This precision-wound coil is a critical element in the tank circuit of the amplifier s output stage, where it plays a pivotal role in determining bandwidth, efficiency, and overall performance across the HF spectrum. Crafted from **high-grade, oxygen-free copper wire** with a robust enamel insulation coating, the coil ensures minimal resistive losses while maintaining exceptional mechanical stability under the demanding conditions of high-voltage, high-current operation. The winding technique employs a **compact, multi-layer helical design**, optimized for resonance at the intended operating frequencies typically spanning from **1.8 MHz to 30 MHz** while minimizing parasitic capacitance and inductance that could degrade signal purity. Its **precision-machined aluminum or high-strength plastic formers** provide structural integrity, preventing deformation under thermal stress, and the coil s mounting hardware is engineered for seamless integration into the amplifier s tank circuit assembly, ensuring consistent performance even under prolonged high-power operation. Whether used in a dedicated **DX-2007A amplifier** or adapted into custom-built linear amplifiers, this coil delivers **exceptional Q-factor and low loss**, allowing for efficient power transfer with minimal distortion. Ideal for serious operators seeking to maximize bandwidth and efficiency in their high-power HF transmissions, the Pi Air DUX-2007A Tank Coil is a testament to thoughtful engineering, combining durability with performance to elevate the capabilities of any amateur radio setup.

### Pros and Cons of Buying a PI Air Dux 2007A Tank Coil for a Ham Radio Amplifier

#### **Pros**

1. **High Performance and Efficiency** The PI Air Dux 2007A is a high-quality, air-cooled tank coil designed for high-power applications, making it suitable for linear amplifiers in the HF and VHF bands. It is engineered to minimize losses and maximize efficiency, which is critical for high-power transmitters.

2. **Durability and Reliability** Constructed with high-grade materials, including copper windings and robust insulation, this coil is built to withstand prolonged use under heavy loads. Its air-cooled design reduces thermal stress on components, extending the lifespan of the amplifier.

3. **Compatibility with Popular Amplifiers** The 2007A is specifically designed to work with the PI Engineering Air Dux series of amplifiers, such as the 2007A itself, ensuring optimal performance when used in its intended system. It is also compatible with other high-power linear amplifiers that require a similar tank coil configuration.

4. **Reduced Heat Buildup** Unlike solid-state or iron-core coils, air-core coils like the 2007A do not suffer from hysteresis or eddy current losses, which means less heat generation. This makes it ideal for high-duty-cycle operation, such as in contesting or DXing where continuous high-power output is required.

5. **Tunability and Flexibility** The coil s design allows for precise tuning across a wide range of frequencies, making it adaptable for different bands and modes. This flexibility is particularly useful for operators who frequently switch between HF and VHF segments.

6. **Minimal Maintenance** Due to its simple construction and lack of moving parts, the 2007A requires minimal maintenance compared to other high-power components like iron-core inductors or solid-state devices. This reduces downtime and operational hassle.

7. **Superior RF Performance** Air-core coils exhibit lower parasitic capacitance and inductance, which improves the amplifier s bandwidth and reduces distortion. This results in cleaner, more linear output, which is essential for SSB and CW operation.

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#### **Cons**

1. **High Cost** High-quality air-core tank coils like the PI Air Dux 2007A are expensive compared to alternatives such as iron-core coils or even some solid-state solutions. The cost may be prohibitive for budget-conscious operators or those just starting in high-power amateur radio.

2. **Limited Availability** While PI Engineering is a reputable manufacturer, their products may not be as widely available as generic or aftermarket components. This could make repairs or replacements more difficult to source, especially if the coil is no longer in production.

3. **Physical Size and Installation Complexity** Air-core coils are often larger and heavier than their iron-core counterparts. Installing the 2007A may require additional space in the amplifier s enclosure and careful routing of wiring to avoid interference or mechanical stress. This can complicate DIY builds or retrofitting existing amplifiers.

4. **Sensitivity to Mechanical Stress** Although durable, air-core coils can be susceptible to damage from physical shocks or vibrations, particularly if the windings are not properly secured. Improper handling during installation or maintenance could lead to short circuits or performance degradation.

5. **Requires Expertise for Tuning and Maintenance** Tuning an air-core tank coil to optimal performance requires a good understanding of RF principles and amplifier design. Misalignment or improper tuning can lead to inefficient operation, excessive heat, or even damage to the amplifier. This may necessitate the assistance of an experienced technician.

6. **Not Ideal for All Power Levels** While the 2007A is robust, extremely high-power applications (e.g., 2 kW or more) may still require additional cooling or supplementary components to manage heat dissipation, even with an air-cooled design. In such cases, the coil may need to be paired with other cooling solutions.

7. **Potential for Parasitic Oscillations** Like all high-Q tank circuits, air-core coils can be prone to parasitic oscillations if not properly shielded or matched to the amplifier s other components. This may require additional filtering or adjustments to stabilize operation, adding complexity to the setup.

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### **Conclusion**

The PI Air Dux 2007A tank coil is a superior choice for ham radio operators who prioritize performance, efficiency, and reliability in their high-power linear amplifiers. Its air-core design minimizes losses, reduces heat, and delivers clean, linear output, making it ideal for serious DXers, contesters, and operators who demand the best from their equipment. However, the high cost, limited availability, and the need for careful installation and tuning may pose challenges, particularly for those on a tight budget or with limited technical expertise.

For operators who are willing to invest in a high-performance amplifier and have the space and skills to integrate it properly, the 2007A is an excellent long-term solution. Those operating at lower power levels or on a budget may find that alternative tank coil designs (e.g., iron-core or lower-cost air-core options) offer a more practical compromise without sacrificing too much performance.

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### **Recommendation**

If you are building or upgrading a high-power linear amplifier (e.g., 1 kW or higher) and require a tank coil that delivers optimal efficiency, low distortion, and minimal heat, the **PI Air Dux 2007A is highly recommended**. It is particularly well-suited for HF and VHF operation, especially in applications where reliability and performance are critical.

However, if budget constraints or space limitations are concerns, consider the following alternatives:

- **PI Air Dux 2007B or 2007C**: These models may offer slight variations in performance or cost that could better align with your needs.

- **Aftermarket Air-Core Coils**: Brands like **Duality, Comet, or homebrew designs** may provide similar performance at a lower cost, though quality and compatibility should be thoroughly researched.

- **Iron-Core Coils with Proper Shielding**: For lower power levels (e.g., 500 W 1 kW), iron-core coils with adequate shielding can be a cost-effective alternative, though they may introduce slightly more losses and require careful tuning.

Ultimately, if you are committed to the PI Engineering ecosystem and can justify the investment, the **2007A is the best choice for maximizing amplifier performance**. For others, weigh the trade-offs carefully and consider whether the added benefits outweigh the costs. Always ensure that any tank coil you choose is properly matched to your amplifier s power handling and tuning requirements.

Details:

Electronic Engineering has developed a complete, versatile series of Air core indicators designed especially for the amateur ham rig, or prototypes RF transmission equipment. AIR DUX coils are constructed of tinned copper wire wound on polystyrene rod for highest mechanical strength and lowest electrical losses. The series consists of a range diameters from 1/2 to 3, with each diameter wound in four or more different Pitches. Combined shipping is available for most of my listings.

Air Dux box is missing flap on one end. Plan to use AIR DUX coils on your next transmitter project. Please see photos for details, condition and.

part #: 2007a price

  • $106.25

specifications hamamateuradio:

  • brand: Pi Air Dux
  • mpn: 2007a
  • type: Ham Radio Amplifier
  • compatible brand: Universal
  • country of origin: United States

general hamamateuradio:

  • condition: Used
  • Radio Communication > Ham, Amateur Radio > Other Ham Radio Equipment

payments hamamateuradio:

  • other
  • money order
  • wallet: Google-pay
  • credit card: Discover

offer hamamateuradio:

  • started: April 11, 2026
  • availability: In Stock
  • options: Ship-to-home
  • sold: 0
  • quantity: 1

seller hamamateuradio:

  • city: McDonough, Georgia
  • # reviews: 300
  • rating: 100.0%

returns hamamateuradio:

  • policy: No Returns

shipPing hamamateuradio:

  • carrier: USPS
  • class: Standard
  • cost: $8.65
  • type: Calculated
  • transit: 5-11 Days
  • service: USPS Ground Advantage
type: ham radio amplifier, compatible brand: universal, country of origin: united states,
category: electronics > radio communication > ham, amateur radio > ham radio equipment, sku: 13781912998612892,
Pi Air Dux 2007A Is Similar To:
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1 offer $106.25 USD
  • Used. Offer #1 priced at $106.25 + $24.47 shipping estimate = $130.72* total. NO INSTALLATION HARDWARE IS INCLUDED.JUST WHAT YOU SEE IN THE PICTURES. FOR SALE A USED BUT IN GREAT, GREAT CONDITION HARLEY DAVIDSON TANK CONSOLE.+$24.47 shipping

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