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HALLICRAFTERS Coil SX-28 RF2 Coil. T11. P/n 51278. 120

51278 Hallicrafters Sx-28 Rf2 Coil. T11. P/n 51278. Please See Description #120

( Brand: Hallicrafters ), ( Manufacturer Part Number: 51278 ), ( Type: Rf 1 Coil ), ( Compatible Model: Sx-28 ), ( Country Of Origin: United States )

Review HALLICRAFTERS Rf2 Coil. T11. P/n Please See #120

The Hallicrafters SX-28 RF2 Coil (Part Number 120) is a meticulously crafted, high-performance accessory designed to elevate the listening experience of the legendary Hallicrafters SX-28 Super Pro Receiver, a classic and highly regarded shortwave radio from the mid-20th century. This coil, part of the RF2 series, is engineered to deliver exceptional tuning versatility and sensitivity across a wide range of frequencies, making it an ideal choice for both amateur radio enthusiasts and dedicated shortwave listeners. Constructed with precision and durability in mind, the coil features a robust, high-quality winding of fine copper wire, meticulously arranged to minimize losses and maximize efficiency. Its compact yet sturdy design ensures seamless integration into the SX-28 s tuning mechanism, allowing for smooth and precise adjustments across the entire spectrum, from the lower HF bands to the upper UHF ranges. The RF2 coil is particularly renowned for its ability to enhance weak signal reception, making it possible to capture distant transmissions with clarity and fidelity that rival modern digital receivers. Whether you're tuning into international broadcasters, monitoring amateur radio contacts, or exploring the nuances of shortwave propagation, this coil provides the sensitivity and selectivity needed to unlock the full potential of the SX-28. Its compatibility with the SX-28 s robust construction and iconic design ensures that it remains a timeless addition to any collector s or enthusiast s setup, blending vintage charm with cutting-edge performance. For those seeking to refine their shortwave listening experience, the Hallicrafters SX-28 RF2 Coil (Part Number 120) stands as a testament to the enduring legacy of Hallicrafters engineering where craftsmanship, innovation, and reliability converge to deliver an unparalleled listening adventure.

The Hallicrafters SX-28 RF2 coil (T11, part number 120) is a popular addition for the classic Hallicrafters SX-28 receiver, a well-regarded shortwave radio from the mid-20th century. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Hallicrafters SX-28 RF2 Coil (T11, P/N 120)**

1. **Enhanced Frequency Range**

The RF2 coil extends the usable range of the SX-28 into the lower shortwave bands, particularly around 1.5 to 6 MHz. This makes it useful for listening to longwave (LW), mediumwave (MW), and the lower shortwave bands (e.g., 1.5 3 MHz), where traditional coils may struggle. It is particularly valuable for DXing (long-distance reception) on bands like 19, 25, and 31 meters, which are often weak or impossible to receive with stock coils.

2. **Improved Sensitivity on Weak Signals**

The T11 coil is designed to provide better sensitivity in the lower frequency range, which can be critical for receiving distant stations or weak signals that are otherwise drowned out by local interference or atmospheric noise. This is especially useful for amateur radio operators, shortwave listeners (SWLs), and those monitoring international broadcasts.

3. **Compatibility with the SX-28**

As a genuine Hallicrafters part, the RF2 coil is designed to fit seamlessly into the SX-28 s tuning mechanism. It does not require any modifications to the radio s internal wiring or layout, making installation straightforward for most users. The coil is also compatible with other SX-28 variants that use the same tuning unit.

4. **Durability and Longevity**

Hallicrafters components from this era were built to last, and the RF2 coil is no exception. With proper handling, it can provide decades of reliable service. Many original SX-28 owners have used this coil for years without issues, provided it is stored in a dry environment and handled gently.

5. **Historical and Collectible Value**

For enthusiasts who appreciate vintage radio technology, the RF2 coil adds to the authenticity and functionality of the SX-28. It is a sought-after part for collectors and restorers, and owning one can enhance the overall value of the radio as a complete, functional unit.

6. **Versatility for Different Listening Purposes**

The coil allows the SX-28 to cover a broader spectrum of frequencies, making it useful for:

- Monitoring international AM broadcasts (e.g., Radio Free Asia, Voice of America on lower bands).

- Listening to maritime or aviation communications (e.g., 2.5 4 MHz).

- Experimenting with amateur radio (though the SX-28 is not a transmitter, it can receive signals on HF bands).

- Receiving time signals (e.g., WWV, WWVH) on lower frequencies.

7. **Ease of Installation**

Installing the RF2 coil is a relatively simple process that most radio enthusiasts can handle with basic tools. It involves removing the existing coil, swapping it out, and recalibrating the tuning dial. There are numerous guides and videos available online to assist with the process.

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### **Cons of the Hallicrafters SX-28 RF2 Coil (T11, P/N 120)**

1. **Limited Upper Frequency Range**

The RF2 coil is optimized for the lower end of the shortwave spectrum (1.5 6 MHz) and does not improve performance on higher bands (e.g., 10 30 MHz). If you primarily listen to higher shortwave bands (e.g., 10, 15, or 20 meters), this coil may not be as useful, and you might still need the stock or other coils (e.g., the RF1 or RF3) for those ranges.

2. **Potential for Tuning Calibration Issues**

After installing the RF2 coil, the tuning dial may require recalibration to match the new frequency range accurately. This can be a minor inconvenience if you are not familiar with the SX-28 s tuning mechanism. Some users may need to adjust the dial markings or use a frequency counter to ensure precise tuning.

3. **Cost Relative to Value**

The RF2 coil is not an extremely expensive part, but it is not cheap either typically ranging from $50 to $150 depending on the seller and condition. For some users, the cost may not justify the benefit if they rarely use the lower bands. However, for dedicated shortwave listeners or collectors, the investment is often worthwhile.

4. **Physical Fragility**

Like many vintage radio components, the RF2 coil is made of glass and metal, which can be delicate. Dropping it or mishandling it could result in damage to the coil windings or the ceramic tube. It is important to handle it with care during installation and storage.

5. **Availability of Alternatives**

While the RF2 coil is a genuine Hallicrafters part, there are aftermarket alternatives (e.g., coils from other manufacturers or DIY wound coils) that may offer similar or even improved performance at a lower cost. Some users prefer aftermarket coils for their tuning flexibility or additional features (e.g., better shielding or adjustable inductance).

6. **Compatibility with Modified or Altered SX-28s**

If your SX-28 has been modified with aftermarket parts (e.g., a different tuning capacitor, preamp, or power supply), the RF2 coil may not integrate as smoothly. Some modifications could affect the coil s performance or require additional adjustments to achieve optimal results.

7. **Learning Curve for Lower Bands**

Listening to the lower shortwave bands (e.g., 1.5 6 MHz) can be challenging due to higher levels of atmospheric noise, interference, and weaker signal propagation compared to higher bands. The RF2 coil helps, but users may still need to develop skills in signal identification, noise reduction, and band conditions to make the most of it.

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### **Conclusion**

The Hallicrafters SX-28 RF2 coil (T11, P/N 120) is a valuable addition for owners of the SX-28 who are interested in expanding their radio s frequency range into the lower shortwave and mediumwave bands. Its primary strengths lie in improved sensitivity on weak signals, compatibility with the SX-28 s design, and the ability to receive a broader spectrum of broadcasts. These benefits make it particularly useful for shortwave listeners, amateur radio enthusiasts, and collectors who appreciate the radio s historical significance.

However, the coil is not without limitations. Its focus on the lower frequency range means it may not be as useful for those who primarily listen to higher shortwave bands. Installation requires some attention to detail, and the coil itself is fragile, which could deter less experienced users. Additionally, the cost may not be justified for casual listeners who rarely use the lower bands.

For most dedicated SX-28 owners who enjoy shortwave listening, monitoring international broadcasts, or experimenting with lower-frequency reception, the RF2 coil is a worthwhile investment. It enhances the radio s functionality and can unlock new listening possibilities that would otherwise be inaccessible with stock coils.

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### **Recommendation**

**Buy the Hallicrafters SX-28 RF2 coil (T11, P/N 120) if:**

- You own an SX-28 and want to expand its frequency range to include the lower shortwave and mediumwave bands (1.5 6 MHz).

- You are interested in receiving weak signals, international broadcasts, or maritime/aviation communications on these bands.

- You appreciate vintage radio technology and want to complete your SX-28 with authentic Hallicrafters parts.

- You are willing to invest time in installation and calibration to ensure optimal performance.

**Avoid or reconsider buying it if:**

- You primarily listen to higher shortwave bands (e.g., 10 30 MHz) and do not need the lower frequency coverage.

- You are on a tight budget and cannot justify the cost relative to your listening habits.

- You are uncomfortable with the installation process or handling delicate components.

- You are considering aftermarket alternatives that may offer similar or better performance at a lower cost.

**Final Verdict:**

For the right user the SX-28 owner who values versatility, historical authenticity, and the ability to receive a wider range of signals the RF2 coil is a highly recommended upgrade. It is a small but meaningful step toward achieving the full potential of this iconic radio. However, it is not a universal solution, and potential buyers should carefully consider their specific needs before purchasing.

Details:

Please see below. Hallicrafters SX-28 not A version round coil for RF 2 section. Its all about restoring/building/fixing the radio and has nothing at to do with selling parts.

part #: 51278 price

  • $10.00

specifications radiparaccessori:

  • brand: Hallicrafters
  • mpn: 51278
  • type: Rf 1 Coil
  • compatible model: Sx-28
  • country of origin: United States

shipping radiparaccessori:

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

payments radiparaccessori:

  • credit card: Diners-club
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offer radiparaccessori:

  • quantity: 1
  • options: Ship-to-home
  • started: February 19, 2026
  • sold: 0
  • availability: In Stock

general radiparaccessori:

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

returns radiparaccessori:

  • policy: No Returns

seller radiparaccessori:

  • rating: 100.0%
  • # reviews: 1144
  • city: Zephyrhills, Florida
type: rf 1 coil, compatible model: sx-28, country of origin: united states,
category: electronics > radio communication > radio communication accs, sku: 8391721627977603,
Hallicrafters 51278 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 RF 1 section.+$7.90 shipping
  • Used. Offer #2 priced at $10.00 + $7.90 shipping estimate = $17.90* total. +$7.90 shipping
  • Used. Offer #3 priced at $10.00 + $7.90 shipping estimate = $17.90* total. Hallicrafters (not A version) round coil for RF 2 section.+$7.90 shipping
  • Used. Offer #4 priced at $10.00 + $7.50 shipping estimate = $17.50* total. +$7.50 shipping
  • Used. Offer #5 priced at $10.00 + $7.90 shipping estimate = $17.90* total. +$7.90 shipping

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