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HALLICRAFTERS Mixer Coil SX-28 Coil. T20. P/n 51285.

51285 Hallicrafters Sx-28 Mixer Coil. T20. P/n 51285. Please See Description #111

( Brand: Hallicrafters ), ( Manufacturer Part Number: 51285 ), ( Type: Mixer Coil ), ( Compatible Model: Sx-28 )

Review HALLICRAFTERS Mixer Coil. T20. P/n Please See #111

The Hallicrafters 51285 SX-28 Mixer Coil (T20, Part Number 51285) is a meticulously crafted, high-performance accessory designed to elevate the capabilities of the legendary SX-28 Shortwave Receiver, a classic in the world of amateur radio and shortwave listening. This precision-engineered coil is tailored specifically for the T20 tuning range, offering enthusiasts and operators a refined means to explore the upper reaches of the shortwave spectrum with exceptional clarity and sensitivity. Constructed with the same dedication to quality that Hallicrafters is renowned for, this mixer coil features a robust, durable design that ensures reliable performance over extended periods of use. The coil s winding is optimized to deliver superior selectivity and image rejection, allowing listeners to isolate weak signals with ease while minimizing interference from adjacent frequencies. Whether tuning into distant DX stations, monitoring international broadcasts, or engaging in amateur radio communication, this coil enhances the receiver s ability to capture faint signals with remarkable fidelity. Its compatibility with the SX-28 s iconic front-panel tuning dial makes it an ideal choice for those seeking to expand their receiver s range without compromising on the vintage charm and mechanical precision of the original design. Perfect for both collectors and active users, the Hallicrafters 51285 SX-28 Mixer Coil (T20) is a testament to the brand s enduring legacy of craftsmanship and innovation in radio technology.

The Hallicrafters SX-28 Mixer Coil (T20, Part Number 51285) is a vintage shortwave listening (SWL) coil designed for use with Hallicrafters receivers, particularly the SX-28, a popular mid-century shortwave transceiver. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of buying a Hallicrafters SX-28 Mixer Coil (T20, P/N 51285)**

1. **Compatibility and Performance**

The SX-28 is a well-regarded shortwave transceiver known for its robust performance, and the T20 mixer coil is specifically designed to optimize its operation. This coil is tuned for the 10-meter band (28 MHz) and is part of the receiver s original tuning system, ensuring it works seamlessly with the SX-28 s circuitry. The coil is designed to handle the high frequencies and power levels typical of the SX-28, providing clear reception and strong signal handling.

2. **Historical and Collectible Value**

The SX-28 is a classic piece of radio equipment, and its components, including the mixer coil, are sought after by collectors. Owning an original or restored part like this adds to the historical and nostalgic value of your setup. If you are a ham radio operator or enthusiast interested in vintage gear, this coil can be a meaningful addition to your collection.

3. **Durability and Longevity**

Hallicrafters equipment from the mid-20th century was built to last, and the T20 mixer coil is no exception. The materials used in its construction, such as high-quality wire and insulating materials, are designed to withstand years of use. If the coil is in good condition, it can provide reliable performance for decades, especially if properly maintained.

4. **Customization and Tuning Flexibility**

The SX-28 s tuning system allows for some flexibility in adjusting the coil to optimize performance for specific frequencies or conditions. While the T20 coil is factory-tuned for 10 meters, experienced users may be able to retune or modify it slightly to improve reception on adjacent bands or under different propagation conditions. This can be appealing to those who enjoy hands-on tuning and optimization.

5. **Support for Amateur Radio Operations**

The SX-28 is a transceiver, meaning it can both receive and transmit signals. The T20 mixer coil is designed to handle the demands of both receiving and transmitting, making it suitable for amateur radio operations. If you are a ham operator looking to restore or upgrade your SX-28, this coil ensures that your transceiver can perform reliably during both receive and transmit cycles.

6. **Availability of Spare Parts**

While vintage Hallicrafters parts can be challenging to find, the SX-28 remains a popular radio, and a community of enthusiasts continues to support its maintenance. The T20 mixer coil is a relatively common part, and you may be able to find replacements or additional coils if needed. Online forums, ham radio clubs, and specialty retailers often carry these components.

7. **Educational Value**

Working with vintage equipment like the SX-28 and its components offers a unique learning experience. The mixer coil is a critical part of the receiver s superheterodyne design, and understanding how it functions can deepen your knowledge of radio theory and electronics. This can be particularly valuable for hobbyists or students interested in the history of radio technology.

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### **Cons of buying a Hallicrafters SX-28 Mixer Coil (T20, P/N 51285)**

1. **Age and Wear**

The primary drawback of purchasing a vintage mixer coil like the T20 is its age. Even if the coil is in good condition, it may show signs of wear, such as frayed wire, oxidized terminals, or degraded insulation. Over time, the materials used in the coil may have deteriorated due to exposure to air, humidity, or handling. This can lead to performance issues or even failure if the coil is not properly restored or maintained.

2. **Restoration and Maintenance Requirements**

To ensure optimal performance, the coil may require cleaning, rewinding, or retuning. This can be a time-consuming and technically challenging process, especially if you lack experience with radio restoration. If you are not comfortable with soldering, wire handling, or tuning coils, you may need to hire a professional, which can add to the cost. Additionally, sourcing replacement parts for restoration (such as high-quality wire or insulating materials) can be difficult and expensive.

3. **Compatibility with Modern Equipment**

While the T20 coil is designed for the SX-28, modern shortwave receivers and transceivers often use different tuning systems or coil configurations. If you are not specifically using the SX-28, the coil may not be compatible with other radios, limiting its practical use. This can be a significant drawback if you are looking for a versatile component that can be used across multiple setups.

4. **Cost and Availability**

Vintage Hallicrafters parts can be expensive, especially if they are original or in good condition. The T20 mixer coil may not be widely available, and prices can fluctuate based on demand and the seller s condition. Additionally, if you are unable to find the coil or need to replace it in the future, sourcing a new one could be challenging and costly.

5. **Potential for Performance Limitations**

Modern shortwave receivers and transceivers often incorporate advanced technologies such as digital signal processing (DSP), better filtering, and more efficient power handling. The SX-28 and its mixer coil are limited by the technology of their era. While this may not be a concern for enthusiasts who appreciate vintage gear, it could be a limitation if you are looking for state-of-the-art performance or features.

6. **Risk of Damage During Handling**

Vintage coils, especially those with delicate windings or fragile terminals, can be easily damaged if not handled carefully. Accidental drops, mishandling, or improper storage can lead to short circuits, broken windings, or other issues that render the coil unusable. This risk is particularly relevant if you are not experienced with handling sensitive electronic components.

7. **Legal and Licensing Considerations**

If you plan to use the SX-28 for transmitting (as a transceiver), you will need to comply with amateur radio licensing regulations. While the coil itself does not require a license, operating the SX-28 on transmitting frequencies may require an amateur radio license depending on your country s laws. Ensure that you are legally permitted to use the equipment for transmitting before purchasing.

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### **Conclusion**

The Hallicrafters SX-28 Mixer Coil (T20, P/N 51285) is a valuable and historically significant component for enthusiasts of vintage shortwave radios. It offers excellent performance for the SX-28, historical appeal, and durability if properly maintained. However, its age, potential wear, and the need for restoration or maintenance may pose challenges, particularly for those without experience in radio repair. Additionally, the coil s compatibility is limited to the SX-28 and similar vintage equipment, which may not align with modern needs.

If you are a dedicated ham radio operator, collector, or enthusiast of vintage electronics, the T20 mixer coil can be a rewarding purchase. It adds authenticity and functionality to your SX-28 setup and can be a source of pride for those who appreciate the craftsmanship of mid-20th-century radio technology. However, if you prioritize modern convenience, ease of use, or versatility, you may find that newer coils or receivers better suit your needs.

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### **Recommendation**

Purchase the Hallicrafters SX-28 Mixer Coil (T20, P/N 51285) if:

- You own or plan to restore an SX-28 and want to ensure its optimal performance.

- You are a collector or enthusiast who values vintage radio equipment and is willing to invest time in restoration and maintenance.

- You are comfortable with handling delicate electronic components and are prepared to troubleshoot or seek professional help if needed.

- You appreciate the historical significance of the equipment and enjoy the challenge of working with classic technology.

Avoid purchasing the coil if:

- You are not committed to maintaining or restoring vintage equipment and prefer modern, low-maintenance alternatives.

- You lack experience with radio repair and are unwilling to learn or seek assistance for restoration.

- You do not own an SX-28 or similar vintage transceiver, as the coil s compatibility is limited.

- You prioritize cost-effectiveness and are concerned about the potential expenses of sourcing replacement parts or professional restoration services.

For those who decide to proceed, thoroughly inspect the coil for signs of wear or damage before purchasing. Consider testing it in your SX-28 to ensure it functions as expected. If restoration is required, allocate time and resources to the process, and do not hesitate to seek guidance from experienced ham radio operators or restoration forums. Ultimately, the T20 mixer coil can be a rewarding addition to your collection, but it requires dedication and care to fully enjoy its benefits.

Details:

Hallicrafters SX-28 not A version round coil for oscillator section. Please see below. Its all about restoring/building/fixing the radio and has nothing at to do with selling parts.

part #: 51285 price

  • $10.00

specifications radiparaccessori:

  • brand: Hallicrafters
  • mpn: 51285
  • type: Mixer Coil
  • compatible model: Sx-28

offer radiparaccessori:

  • quantity: 1
  • sold: 0
  • started: February 16, 2026
  • availability: In Stock
  • options: Ship-to-home

general radiparaccessori:

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

shipping radiparaccessori:

  • type: Fixed
  • transit: 4-8 Days
  • carrier: USPS
  • service: USPS Ground Advantage
  • class: Standard
  • cost: $0.00

returns radiparaccessori:

  • policy: No Returns

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seller radiparaccessori:

  • # reviews: 1138
  • city: Zephyrhills, Florida
  • rating: 100.0%
type: mixer coil, compatible model: sx-28,
category: electronics > radio communication > radio communication accs, sku: 8379876307377603,
Hallicrafters 51285 Is Similar To:
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5 offers $10.00–$10.00 USD
  • Used. Offer #1 priced at $10.00 + $7.90 shipping estimate = $17.90* total. Hallicrafters (not A version) round coil for mixer section.+$7.90 shipping
  • Used. Offer #2 priced at $10.00 + $7.90 shipping estimate = $17.90* total. Hallicrafters (not A version) round coil for the mixer section.+$7.90 shipping
  • Used. Offer #3 priced at $10.00 + $7.90 shipping estimate = $17.90* total. +$7.90 shipping
  • Used. Offer #4 priced at $10.00 + $7.90 shipping estimate = $17.90* total. Hallicrafters (not A version) round coil for oscillator section.+$7.90 shipping
  • Used. Offer #5 priced at $10.00 + $7.90 shipping estimate = $17.90* total. +$7.90 shipping

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