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HALLICRAFTERS Osc Coil SX-28 Coil. T25. P/n 51290. 105

51290 Hallicrafters Sx-28 Osc Coil. T25. P/n 51290. Please See Description #105

( Brand: Hallicrafters ), ( Manufacturer Part Number: 51290 ), ( Type: Osc Coil ), ( Compatible Model: Sx-28 )

Review HALLICRAFTERS Osc Coil. T25. P/n Please See #105

The Hallicrafters SX-28 OSC Coil T25 (Part Number 105) is a meticulously crafted, high-performance tuning coil designed for vintage and modern amateur radio enthusiasts seeking precision and versatility in their shortwave listening and communication setups. Originally engineered for the legendary Hallicrafters SX-28, a classic super-regenerative receiver beloved by DXers and radio hobbyists, this coil is a testament to the brand s enduring commitment to quality and innovation. Constructed with a robust, insulated copper winding, the T25 coil delivers exceptional selectivity and sensitivity across the 25-meter band, making it ideal for weak-signal reception, international broadcasting, and amateur radio operations. Its compact yet sturdy design ensures minimal interference while maximizing signal clarity, allowing operators to fine-tune their listening experience with ease. The coil s precise tuning range typically spanning from approximately 11.0 to 11.99 MHz makes it particularly well-suited for monitoring shortwave military traffic, aviation frequencies, and rare international broadcasts that fall within this critical spectrum. Whether used in a restored SX-28 or adapted into other compatible receivers, this coil offers a blend of historical authenticity and modern reliability, appealing to both purists and experimenters alike. Its durable construction and time-tested performance ensure it remains a reliable component for decades of use, embodying the spirit of classic radio engineering.

The Hallicrafters SX-28 OSC (Part Number 105) is a classic and well-regarded amateur radio transceiver, particularly favored by vintage radio enthusiasts and those who appreciate analog communication. 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 OSC (105)**

1. **Classic Design and Build Quality**

The SX-28 is a well-engineered, rugged radio built to last. Its solid-state construction (for the OSC variant) and metal chassis give it a durable, professional appearance. Many units from the 1970s and 1980s remain fully functional after decades of use, especially when properly maintained.

2. **Versatile Frequency Coverage**

The SX-28 covers a wide range of amateur bands, including HF (160m 10m), VHF (6m), and UHF (2m) in some models. The OSC variant (with its solid-state oscillator) is particularly stable across these frequencies, reducing drift issues common in older tube-based radios.

3. **Solid-State Reliability**

Unlike earlier tube-based Hallicrafters models, the SX-28 OSC uses solid-state components, which are less prone to failure from age, power surges, or temperature fluctuations. This makes it more reliable for modern use compared to vintage tube radios.

4. **Good Audio Quality**

The SX-28 delivers clear, crisp audio with minimal distortion. Its speaker and headphone output are adequate for casual use, though external amplification may be needed for serious DXing or contesting.

5. **Modular and Upgradable**

The SX-28 was designed with modularity in mind. Many components (such as the power supply, filters, and even the oscillator) can be replaced or upgraded. This makes it a good candidate for restoration or customization.

6. **Community and Support**

The Hallicrafters SX-28 has a dedicated following among vintage radio enthusiasts. There are numerous forums, repair guides, and parts suppliers available online, making it easier to troubleshoot or restore if issues arise.

7. **Aesthetic and Collectible Value**

For collectors and hobbyists, the SX-28 holds nostalgic and historical value. Its retro design and association with classic amateur radio make it a desirable piece for those interested in the history of communications technology.

8. **Decent Performance for Its Age**

While not as powerful as modern SDR-based transceivers, the SX-28 performs well for general use, including local contacts, weak-signal work, and even some DXing with proper antenna support.

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### **Cons of the Hallicrafters SX-28 OSC (105)**

1. **Outdated Technology**

The SX-28 is an analog radio, meaning it lacks modern features like digital tuning, memory channels, or built-in data modes (e.g., PSK31, FT8). Users must rely on external devices (like a computer with soundcard or SDR software) for digital modes, which can be cumbersome.

2. **Limited Automation**

There is no built-in automatic antenna tuner, and manual tuning can be time-consuming, especially on crowded bands. Modern radios often include features like automatic band switching or built-in tuners, which the SX-28 lacks.

3. **No Built-in Digital Features**

The SX-28 cannot transmit or receive digital modes natively. While it can be used with external soundcard interfaces for modes like CW or SSB, it cannot handle modern digital protocols like APRS, DMR, or digital voice without additional equipment.

4. **Maintenance and Repair Challenges**

While solid-state, the SX-28 still requires occasional maintenance. Components like capacitors, resistors, and connectors can degrade over time, and finding original parts can be difficult. Some users may need to source modern replacements or restore the radio to full functionality.

5. **Power Requirements**

The SX-28 typically requires a stable 12V DC power supply. Fluctuations or poor power quality can affect performance, and some users may need to invest in a regulated power source or battery backup.

6. **Limited Bandwidth and Selectivity**

The SX-28 s filters are not as narrow or precise as those in modern radios. This can make it harder to isolate weak signals in noisy environments or on crowded bands. Some users may need to pair it with an external filter or IF processor.

7. **No Built-in Microphone or Speaker**

The SX-28 often requires an external microphone and speaker/headphones. While this is not a dealbreaker, it adds to the setup complexity compared to modern radios with built-in audio.

8. **Potential for Drift**

While the OSC variant reduces drift compared to earlier models, some users report minor frequency stability issues, especially if the radio is not properly aligned or if components degrade over time.

9. **No Built-in Antenna Switching**

The SX-28 typically has a single antenna jack, meaning users must manually switch antennas or use an external antenna switch for multi-band operation. This can be inconvenient for those with complex antenna setups.

10. **Learning Curve for Analog Operation**

Operating an analog radio requires a different skill set than modern digital radios. Users must manually tune, adjust squelch, and manage audio levels, which can be less intuitive for beginners.

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### **Conclusion**

The Hallicrafters SX-28 OSC (105) is a fantastic choice for enthusiasts who appreciate vintage radio technology, enjoy the challenge of analog operation, or are interested in restoring and maintaining classic equipment. Its solid-state reliability, durability, and clear audio make it a practical and enjoyable radio for casual use, weak-signal work, and historical preservation.

However, it is not ideal for those seeking modern features like digital modes, automation, or high-performance contesting capabilities. The SX-28 is best suited for:

- Hobbyists who enjoy the nostalgia and hands-on experience of analog radios.

- Those who prioritize reliability and simplicity over cutting-edge technology.

- Collectors or restorers who value the historical significance of the radio.

- Users who are willing to supplement the radio with external equipment (e.g., soundcard interfaces, filters, or tuners) to enhance its functionality.

For modern amateur radio operators who rely on digital modes, automation, or high-performance features, a contemporary SDR-based transceiver (e.g., FlexRadio, Yaesu FTdx-10, or Icom IC-7300) would be a more practical choice. However, the SX-28 remains a rewarding and unique addition to any radio shack for those who appreciate its charm and character.

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### **Recommendation**

If you are drawn to the SX-28 for its vintage appeal, reliability, and analog simplicity, it is a worthwhile purchase especially if you find a well-maintained unit with a clean bill of health. Consider the following steps before buying:

1. **Inspect the Radio Thoroughly**: Check for signs of wear, corrosion, or damaged components. Test the power supply, tuning mechanism, and audio output.

2. **Verify Functionality**: Ensure all bands and modes (SSB, CW) work correctly. Listen for drift or instability in the oscillator.

3. **Budget for Accessories**: Be prepared to invest in an external microphone, speaker, and possibly a soundcard interface if you want to use digital modes.

4. **Join the Community**: Engage with vintage radio forums (e.g., Vintage Radio Forum, eHam) for advice on restoration or troubleshooting.

5. **Consider a Backup**: If you plan to use the SX-28 regularly, pair it with a modern radio for digital modes and automation.

For most modern amateurs, the SX-28 is a supplementary radio rather than a primary one, but its unique character and durability make it a valuable piece of equipment for those who appreciate the art of analog radio. If you are committed to the analog experience and willing to embrace its limitations, the Hallicrafters SX-28 OSC is a fantastic and rewarding purchase.

Details:

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

part #: 51290 price

  • $10.00

specifications radiparaccessori:

  • brand: Hallicrafters
  • mpn: 51290
  • type: Osc Coil
  • compatible model: Sx-28

payments radiparaccessori:

  • wallet: Paypal
  • credit card: Mastercard
  • other

shipping radiparaccessori:

  • carrier: USPS
  • service: USPS Ground Advantage
  • type: Fixed
  • class: Standard
  • transit: 5-9 Days
  • cost: $0.00

returns radiparaccessori:

  • policy: No Returns

seller radiparaccessori:

  • rating: 100.0%
  • city: Zephyrhills, Florida
  • # reviews: 1136

general radiparaccessori:

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

offer radiparaccessori:

  • options: Ship-to-home
  • started: February 12, 2026
  • quantity: 1
  • availability: In Stock
  • sold: 0
type: osc coil, compatible model: sx-28,
category: electronics > radio communication > radio communication accs, sku: 8368250393667603,
Hallicrafters 51290 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 oscillator 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 RF 1 section.+$7.90 shipping
  • Used. Offer #3 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 #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. +$7.90 shipping

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