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HALLICRAFTERS Mixer Coil SX-28 Coil. T21. P/n 51286. 112

51286 Hallicrafters Sx-28 Mixer Coil. T21. P/n 51286. Please See Description #112

( Brand: Hallicrafters ), ( Manufacturer Part Number: 51286 ), ( Type: Mixer Coil ), ( Compatible Model: Sx-28 )

Review HALLICRAFTERS Mixer Coil. T21. P/n Please See #112

The Hallicrafters 51286 SX-28 Mixer Coil (T21, Part Number 112) is a meticulously crafted, high-performance component designed to elevate the capabilities of the legendary SX-28 Super Pro receiver, a classic in the world of shortwave and amateur radio communication. This precision-engineered coil is a critical element of the SX-28 s front-end mixer circuit, where it plays a pivotal role in converting incoming signals from the antenna to intermediate frequencies (IF) for further processing. Constructed with Hallicrafters signature attention to detail, the T21 mixer coil features a robust, hand-wound design using high-grade copper wire, ensuring optimal signal integrity and minimal energy loss. Its compact yet sturdy construction allows it to fit seamlessly into the SX-28 s front-end assembly, where it interfaces directly with the receiver s variable tuning capacitor and other critical components to deliver sharp, selective tuning across a wide range of frequencies, from the lower HF bands to the upper VHF spectrum. The coil s design incorporates a balanced layout, reducing stray capacitance and inductance that could otherwise degrade performance, making it ideal for both general shortwave listening and serious amateur radio applications. Whether you're chasing distant DX stations, decoding weak signals, or experimenting with digital modes, this mixer coil ensures that the SX-28 operates at peak efficiency, providing crystal-clear audio and reliable performance. For enthusiasts and restorers seeking to restore their SX-28 to factory specifications or upgrade its performance, the 51286 SX-28 Mixer Coil (T21) is an indispensable, high-quality replacement that embodies the craftsmanship and reliability that Hallicrafters is renowned for.

The Hallicrafters SX-28 mixer coil (T21, part number 112) is a specialized component used primarily in amateur radio (ham radio) for mixing signals in superheterodyne receivers. 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 (T21, P/N 112)**

1. **Compatibility with Classic Hallicrafters Receivers**

The SX-28 was originally designed for the Hallicrafters SX-280 and SX-281 receivers, which are highly regarded for their performance in shortwave listening (SWL) and amateur radio. If you own or plan to restore one of these models, this coil is essential for proper operation. It is also compatible with other Hallicrafters receivers like the SX-100 or SX-200, though some modifications may be required.

2. **High-Quality Construction**

Hallicrafters was known for building robust, well-engineered radios during its prime (1940s 1960s). The SX-28 mixer coil is no exception, featuring high-quality materials and precise winding, which contributes to stable and reliable performance. The coil is designed to handle the demands of shortwave reception, including strong signals and potential interference.

3. **Superior Signal Mixing for Shortwave**

The T21 coil is optimized for mixing signals in the shortwave bands (typically 1.5 30 MHz). It provides good sensitivity and selectivity, which are critical for weak-signal reception. The coil s design helps minimize distortion and image response, reducing interference from adjacent frequencies.

4. **Restoration and Upgrade Potential**

If you are restoring an older Hallicrafters receiver, this coil may be harder to find than newer components, making it a valuable part for authenticity and performance. Additionally, some enthusiasts upgrade their receivers with this coil to enhance their original performance characteristics.

5. **Community and Historical Value**

For collectors and ham radio operators who appreciate vintage equipment, the SX-28 mixer coil holds historical significance. Owning and using it can be part of a broader effort to preserve and revive classic radio technology.

6. **Compatibility with Aftermarket Modifications**

While the coil itself is not easily modifiable, it can be paired with other aftermarket components (e.g., modern preamps or IF stages) to extend the life or improve the performance of an older receiver. Some users have successfully integrated it into hybrid setups.

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### **Cons of buying a Hallicrafters SX-28 Mixer Coil (T21, P/N 112)**

1. **Age and Potential Wear**

The SX-28 mixer coil, like many vintage components, may show signs of age, such as brittle insulation, oxidized terminals, or degraded windings. If the coil is not in pristine condition, it may require careful cleaning, rewinding, or replacement of parts to function reliably. This adds labor and potential risk if you are not experienced with radio restoration.

2. **Limited Availability and High Cost**

Due to its age, the SX-28 mixer coil is not mass-produced and can be difficult to source. Prices for authentic, working examples can be high, especially if they come from a reputable seller or are part of a complete receiver. This makes it a significant investment for hobbyists or collectors.

3. **Compatibility Issues with Non-Hallicrafters Equipment**

While the coil is designed for Hallicrafters receivers, adapting it to other brands (e.g., Drake, Hallicrafters clones, or modern rigs) may require additional modifications or components. For example, the coil s impedance or coupling may not match newer receivers, leading to poor performance or the need for an interface circuit.

4. **Maintenance and Expertise Required**

Working with vintage coils often requires specialized knowledge of radio electronics, soldering skills, and familiarity with tube-based circuitry. If you lack experience, attempting to install or repair the coil could lead to further damage or failure. Consulting with a ham radio technician or joining a restoration forum may be necessary.

5. **Potential for Counterfeit or Poor-Quality Replicas**

The popularity of vintage Hallicrafters equipment has led to the proliferation of counterfeit or poorly made replicas. These may not perform as well as the original or could even damage your receiver if installed incorrectly. Always verify the authenticity of the coil from a trusted source, such as a well-known ham radio dealer or a reputable auction platform.

6. **Obsolescence and Lack of Support**

Since Hallicrafters discontinued production decades ago, there is no official support or warranty for the coil. If it fails, troubleshooting or replacement parts may be difficult to obtain without community assistance. This makes it less ideal for casual users who prioritize convenience over nostalgia.

7. **Performance Limitations Compared to Modern Components**

While the SX-28 mixer coil is excellent for its era, modern receivers often incorporate superior components (e.g., solid-state mixers, better shielding, and digital signal processing) that offer broader bandwidth, lower noise figures, and easier tuning. For contemporary use, a vintage coil may feel outdated or less versatile.

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### **Conclusion**

The Hallicrafters SX-28 mixer coil (T21, P/N 112) is a highly sought-after component for enthusiasts of vintage amateur radio equipment. It excels in compatibility with classic Hallicrafters receivers, offering reliable performance for shortwave listening and amateur radio operations. Its historical value and high-quality construction make it a prized addition for collectors and restorers. However, its age, limited availability, and the expertise required for installation or repair present significant challenges. Additionally, the cost and potential for counterfeit parts can be prohibitive for casual users.

For those who are deeply invested in vintage radio technology, restoring or upgrading a Hallicrafters receiver with this coil can be a rewarding project. However, if your primary goal is modern performance, ease of use, or versatility, investing in a contemporary receiver or aftermarket mixer module may be a more practical choice.

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### **Recommendation**

- **Buy the Hallicrafters SX-28 mixer coil if:**

- You own or plan to restore a Hallicrafters SX-280, SX-281, or compatible receiver and value authenticity and historical performance.

- You are experienced with radio restoration and willing to invest time and effort into ensuring the coil s reliability.

- You are part of a community of vintage radio enthusiasts who can provide guidance or support.

- You are willing to pay a premium for a well-preserved, authentic part from a trusted seller.

- **Avoid or consider alternatives if:**

- You are a beginner in radio restoration and lack the skills or tools to handle vintage components safely.

- You prioritize modern convenience, ease of use, or broader functionality over vintage aesthetics.

- You are unsure of the coil s condition and cannot verify its authenticity or performance.

- You are open to aftermarket alternatives, such as modern mixer modules (e.g., from MFJ or other manufacturers) that offer similar performance with greater reliability and support.

For those on the fence, it may be worthwhile to consult with experienced ham radio operators or restoration experts before purchasing. Additionally, exploring eBay, ham radio forums, or specialized auction sites (with caution) can help you find authentic parts at reasonable prices.

Details:

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

part #: 51286 price

  • $10.00

specifications radiparaccessori:

  • brand: Hallicrafters
  • mpn: 51286
  • type: Mixer Coil
  • compatible model: Sx-28

shipping radiparaccessori:

  • service: USPS Ground Advantage
  • carrier: USPS
  • type: Fixed
  • class: Standard
  • cost: $0.00
  • transit: 4-9 Days

offer radiparaccessori:

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

returns radiparaccessori:

  • policy: No Returns

general radiparaccessori:

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

payments radiparaccessori:

  • other
  • credit card: Diners-club
  • wallet: Paypal

seller radiparaccessori:

  • rating: 100.0%
  • city: Zephyrhills, Florida
  • # reviews: 1138
type: mixer coil, compatible model: sx-28,
category: electronics > radio communication > radio communication accs, sku: 8378612237730892,
Hallicrafters 51286 Is Similar To:
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5 offers $10.00–$10.00 USD
  • Used. Offer #1 priced at $10.00 + $7.50 shipping estimate = $17.50* total. Hallicrafters (not A version) round coil for mixer section.+$7.50 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. +$7.90 shipping
  • Used. Offer #5 priced at $10.00 + $7.90 shipping estimate = $17.90* total. Hallicrafters (not A version) round coil for oscillator section.+$7.90 shipping

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