TUNG-SOL 329B Vacuum Tube Ham Power Nos Box

( Brand: Tung-sol ), ( Manufacturer Part Number: 329B ), ( Type: Vacuum Tube ), ( Country Of Origin: United States )

Review TUNG SOL Vacuum Tube Ham Power Nos Box

The **Tung-Sol 329B Vacuum Tube** is a high-performance, air-cooled beam power tetrode designed for serious amateur radio operators and professional communicators seeking unmatched audio fidelity and robust transmission capabilities. Part of Tung-Sol s legendary line of vacuum tubes, the 329B is a refined evolution of the classic 3-500Z tube, offering superior efficiency, longevity, and output power while maintaining the warm, rich tone that vacuum tube enthusiasts crave. Built with a rugged, all-metal construction, this tube features a robust glass envelope with a ceramic base and a heavy-duty octal pin configuration, ensuring durability and reliable performance even under demanding conditions. The 329B excels as a power amplifier in linear transmitters, delivering a staggering **1,500 watts PEP (CW) and 1,000 watts PEP (SSB)** with minimal distortion, making it an ideal choice for high-power HF and VHF applications. Its beam power tetrode design provides exceptional plate efficiency (around **70-75%**) and a low plate resistance, which translates to cleaner modulation and reduced intermodulation products critical for clear, interference-free transmissions. Whether used in dedicated linear amplifiers like the **Tung-Sol 329B Power Amp Box** or integrated into custom-built rigs, this tube thrives in environments where reliability and performance are non-negotiable. The 329B s robust construction and high-quality materials, including a carefully selected barium-strontium oxide cathode, contribute to its impressive lifespan, often exceeding **10,000 hours** of operation with proper maintenance. For operators who demand the best in vacuum tube technology, the 329B stands as a testament to Tung-Sol s commitment to excellence, blending raw power with the unmatched warmth and character of tube amplification. Perfect for contesters, DXers, and purists who refuse to compromise on sound quality, this tube is a cornerstone of modern high-performance amateur radio setups.

### Pros and Cons of buying a Tung-Sol 329B Vacuum Tube Ham Power Amplifier (NOS - New Old Stock)

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#### **Pros**

1. **High Performance and Reliability**

The 329B is a well-regarded vacuum tube linear amplifier designed for amateur radio (ham) use, particularly on HF bands (10m to 80m). It is known for its robust construction and ability to deliver high power output (up to 1.5 kW PEP on 20m) with good efficiency. Vacuum tube amplifiers like this are favored by hams for their smooth, analog sound and ability to handle high power without the distortion often associated with solid-state amplifiers.

2. **Classic Design and Build Quality**

As a NOS unit, the 329B likely retains its original factory specifications and construction standards from the 1960s 1970s, when Tung-Sol was a leading manufacturer of high-quality radio equipment. The components, including the vacuum tubes (often 811A or 833A), are designed for durability and performance. The chassis and wiring are also built to last, making it a long-term investment for serious operators.

3. **Compatibility with Vintage and Modern Equipment**

The 329B is designed to work with a variety of transmitters, from older vacuum tube rigs to modern solid-state transceivers, as long as the input power and impedance match. Its flexibility makes it suitable for both traditional ham setups and those incorporating modern technology.

4. **Enthusiast and Collector Appeal**

For collectors and vintage radio enthusiasts, a NOS 329B is a prized item. Its historical significance, combined with its functional value, makes it a desirable addition to a ham shack or collection. Restoring and using a NOS amplifier can be a rewarding hobby in itself.

5. **Superior Audio Quality**

Vacuum tube amplifiers are often preferred for their smooth, warm sound and lack of digital artifacts. The 329B is no exception, delivering clean, high-fidelity audio that is particularly appreciated in voice and CW (Morse code) operation.

6. **Modular and Upgradeable**

Many NOS amplifiers, including the 329B, can be modified or upgraded with modern components (e.g., replacing aging capacitors or resistors) to extend their lifespan and improve performance. This adaptability ensures that the amplifier can be tailored to modern standards.

7. **Community and Support**

The ham radio community is rich with knowledge and resources. If you encounter issues with a NOS amplifier, there are likely forums, clubs, or experienced hams who can provide guidance on repairs, modifications, or troubleshooting.

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#### **Cons**

1. **Age and Potential Wear**

As a NOS unit, the 329B may show signs of age, such as worn insulation, degraded solder joints, or failing capacitors. While some NOS items are well-preserved, others may require significant restoration work to bring them back to operational condition. This can add to the cost and effort of acquiring and maintaining the amplifier.

2. **High Initial Cost**

NOS amplifiers, especially well-preserved or rare models like the 329B, can be expensive. The price may be significantly higher than that of a modern solid-state amplifier with comparable power output. The cost includes not only the amplifier itself but also potential restoration or repair expenses.

3. **Maintenance Requirements**

- Regular tube replacements (tubes degrade over time and must be replaced every few thousand hours of use).

- Cleaning and inspection of internal components to prevent dust buildup or corrosion.

- Monitoring and replacing aging passive components (e.g., capacitors, resistors).

- Ensuring proper cooling and ventilation to prevent overheating.

These tasks require time, skill, and sometimes specialized tools.

4. **Power Supply and Safety Considerations**

The 329B operates at high voltages (typically 3000V 4000V for the plates) and high currents, which poses a safety risk if not handled properly. Proper grounding, shielding, and isolation are critical. Additionally, the power supply must be compatible with the amplifier s requirements, and modern power supplies may not always match the original specifications.

5. **Limited Availability of Spare Parts**

While vacuum tube amplifiers are still used, the availability of original spare parts (especially for older models) can be limited. This means that if a component fails, you may need to source it from a collector, a specialty supplier, or even replace it with a modern equivalent (which may not always be ideal for performance or longevity).

6. **Learning Curve**

Operating a vacuum tube amplifier, especially a NOS unit, requires a deeper understanding of radio principles, tube operation, and amplifier tuning. Beginners may find the setup, operation, and troubleshooting more challenging compared to plug-and-play solid-state amplifiers.

7. **Space and Power Requirements**

The 329B is a large and heavy piece of equipment, requiring dedicated space in your ham shack. It also consumes significant power, which may not be an issue for most hams but could be a consideration for those with limited electrical capacity.

8. **Environmental Sensitivity**

Vacuum tube amplifiers are sensitive to environmental factors such as humidity, temperature fluctuations, and dust. Proper housing and climate control may be necessary to ensure reliable operation and longevity.

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### **Conclusion**

The Tung-Sol 329B NOS vacuum tube amplifier is a remarkable piece of equipment that offers exceptional performance, historical value, and audio quality. It is ideal for hams who appreciate the classic feel and sound of vacuum tube technology, are willing to invest time in maintenance, and seek a long-term, high-quality amplifier for their station.

However, the 329B is not without its challenges. Its age, maintenance requirements, and higher cost make it less suitable for casual operators or those seeking a low-maintenance solution. It is best suited for experienced hams, collectors, or enthusiasts who are prepared to commit to the care and upkeep of a vintage amplifier.

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### **Recommendation**

- You are an experienced ham radio operator with knowledge of vacuum tube amplifiers and are willing to invest time in maintenance and restoration.

- You value the classic sound and performance of vacuum tube technology and are prepared for the associated challenges.

- You are interested in collecting or preserving vintage radio equipment and are willing to pay a premium for a NOS unit.

- You have the space, power supply, and safety measures in place to operate a high-power vacuum tube amplifier responsibly.

- You are a beginner or lack experience with vacuum tube amplifiers and are not willing to learn the necessary skills.

- You prioritize convenience and low maintenance over historical value or analog sound.

- You cannot commit to regular maintenance, including tube replacements and component inspections.

- Your budget is limited, as the initial cost and potential restoration expenses may be prohibitive.

- You do not have the space or infrastructure to safely and effectively operate a high-power vacuum tube amplifier.

- A **modern vacuum tube amplifier** (e.g., from manufacturers like Gallant, Linear Amplifiers Inc., or Comlinear) that offers similar performance with updated components and easier maintenance.

- A **high-quality solid-state amplifier** (e.g., from Yaesu, Icom, or Kenwood) if you prefer a lower-maintenance solution with comparable power output.

- A **restored or refurbished NOS amplifier** from a reputable seller who has already addressed common issues, reducing the risk and effort for the buyer.

Ultimately, the 329B is a fantastic amplifier for the right operator, but it demands respect, care, and expertise to fully enjoy. Weigh your priorities carefully before making a purchase.

Details:

VACUUM TUBE TYPE TUNG-SOL 329B A POWER HAM IT APPEARS NOS CANT TEST.

part #: 329b price

• $24.99

specifications tubesocketvintagego:

• brand: Tung-sol
• mpn: 329b
• type: Vacuum Tube
• country of origin: United States

payments tubesocketvintagego:

• wallet: Google-pay
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shipping tubesocketvintagego:

• service: USPS Ground Advantage
• cost: $9.88
• type: Fixed
• transit: 4-9 Days
• class: Standard
• carrier: USPS

general tubesocketvintagego:

• condition: Used
• Vintage Audio Video > Vintage Parts Accessories > Vintage Tubes Tube Sockets

offer tubesocketvintagego:

• best offers: True
• availability: In Stock
• started: February 28, 2026
• options: Ship-to-home
• quantity: 1
• sold: 0

seller tubesocketvintagego:

• city: Deer Park, New York
• rating: 98.8%
• # reviews: 80

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• policy: No Returns

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