GE NL734 General Electric Vacuum Tube Thyratron NL-5855 X6

( Brand: Ge ), ( Manufacturer Part Number: NL734 ), ( Model: 5544 NL734 ), ( Type: Thyratron Tube ), ( Custom Bundle: No ), ( Country Of Origin: United States )

Review GE Vintage General Electric Vacuum Tube Thyratron X6

The **GE NL734 (General Electric NL-5855) Vacuum Tube Thyratron, Type X6** is a rare and highly sought-after piece of vintage electronics, representing a cornerstone of early high-power switching technology. Manufactured by General Electric in the mid-20th century, this **mercury-vapor-filled thyratron** belongs to the **X6 series**, a robust and reliable design optimized for industrial, scientific, and military applications where precise control of high-voltage, high-current loads was essential. The NL-5855 (also known by its military designation, **AN5855**) is a **grid-controlled gas-filled tube**, meaning it operates by ionizing mercury vapor within its sealed envelope to allow current flow between its anode (plate) and cathode once a sufficient grid voltage is applied a principle that predates modern solid-state semiconductors. Its **X6 designation** indicates a **6-pin base configuration**, with dedicated terminals for the **control grid, cathode, anode (plate), and auxiliary electrodes**, making it versatile for a range of circuits, including **pulse generators, radar systems, power supplies, and early computer logic circuits**.

Physically, the NL-734 is housed in a **ceramic or metal envelope** (depending on the variant), typically with a **cylindrical or bulbous shape**, and is often mounted in a **flanged or studded base** for secure installation in high-vibration environments. The tube s **mercury fill** ensures efficient ionization and rapid switching, with a **peak anode current rating of up to 50 amps** and a **peak inverse voltage (PIV) capability of several thousand volts**, making it suitable for demanding applications where reliability under heavy loads was critical. The **grid control mechanism** allows for precise timing of conduction, with **fast recovery times** (typically in the microsecond range), which was revolutionary for its time and enabled applications in **radar modulation, television transmitters, and early digital logic gates** before transistors became widespread.

Beyond its technical specifications, the **GE NL-5855** holds significant historical value as a relic of **mid-20th-century electronics innovation**. Thyratrons like this were the workhorses of **WWII-era radar systems**, **early computer memory units (such as Williams tubes)**, and **industrial power control**, serving as the primary switching element in circuits where semiconductors were either nonexistent or insufficiently robust. Collectors and enthusiasts appreciate the NL-734 for its **aesthetic rarity**, as well as its **functional versatility** it can be used in **DIY projects, restoration work, or educational demonstrations** of vacuum tube technology. However, due to its **mercury content and fragile construction**, handling requires caution, including proper **ventilation, grounding, and disposal protocols** to avoid environmental hazards.

For hobbyists and engineers, the NL-5855 offers a fascinating glimpse into **pre-transistor electronics**, challenging modern practitioners to understand and replicate the **gas-discharge physics** that once defined high-power switching. Whether used in **retro computing projects, amateur radio setups, or as a museum piece**, this thyratron embodies the **ingenuity of an era before integrated circuits**, making it not just a functional component, but a **living artifact of technological history**. Its enduring legacy lies in its **unmatched performance in high-voltage applications**, a testament to GE s engineering prowess during an age when vacuum tubes ruled the electronics landscape.

### **Pros and Cons of Buying a GE NL734 (General Electric NL-5855 Vacuum Tube Thyratron, X6 Series)**

1. **Historical and Collectible Value** The NL734 is a classic vacuum tube thyratron from the mid-20th century, prized by electronics enthusiasts, vintage radio collectors, and hobbyists. Its rarity and age make it a desirable piece for those interested in historical technology.

2. **Technical Significance** As part of the X6 series, it was used in early radar systems, military applications, and industrial controls. Owning one allows access to a piece of engineering history, offering insight into early electronic switching and power control.

3. **Potential for Restoration and Experimentation** If the tube is in usable condition, it can be restored and used in DIY projects, such as building vintage radios, high-voltage experiments, or even modern retro-computing setups (e.g., PDP-8 or early minicomputers).

4. **Nostalgia and Educational Value** For those fascinated by the evolution of electronics, studying and handling a thyratron provides a tangible connection to pre-transistor technology. It can be a valuable teaching tool for understanding gas-filled tubes and early switching mechanisms.

5. **Potential Resale or Trade Value** In well-preserved condition, a GE NL734 could fetch a moderate price among collectors, especially if it comes with documentation or original packaging.

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1. **Extreme Fragility** Vacuum tubes, especially older ones, are delicate. The NL734 is a glass-enclosed thyratron, meaning it is highly susceptible to shock, vibration, and thermal stress. Even minor handling errors can shatter the glass or damage internal components.

2. **High Risk of Failure or Damage** If the tube is not in perfect condition, it may be non-functional due to internal degradation, gas leakage, or cathode issues. Testing requires specialized equipment (high-voltage power supply, oscilloscope, etc.), and improper testing can destroy the tube.

3. **Limited Practical Use Today** Unlike modern solid-state switches, thyratrons require high voltages (often hundreds or thousands of volts) and specialized circuits to operate safely. Most modern applications do not need such tubes, making their use niche and often impractical without extensive setup.

4. **Maintenance and Storage Challenges** Thyratrons must be stored in a dry, dust-free environment to prevent corrosion or contamination. If not properly maintained, they can degrade over time, even when unused.

5. **Cost of Restoration and Testing** If the tube is damaged or non-functional, restoring it may require sourcing replacement parts (which are often unavailable) or professional repair services. Testing and verifying functionality can be expensive and time-consuming.

6. **Safety Risks** Operating a thyratron involves high voltages and currents, posing a serious electrical hazard. Improper handling can lead to electric shock, arcing, or even fires. Only experienced individuals should attempt to use or test such tubes.

7. **Market Availability and Authenticity** Finding an authentic, well-documented NL734 can be difficult. Many "vintage" tubes on the market are either fakes, mislabeled, or in poor condition. Verifying authenticity and condition requires expertise.

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The GE NL734 is a fascinating and historically significant vacuum tube, but its purchase is not a decision to be taken lightly. It is best suited for **collectors, hobbyists with extensive electronics experience, or those with a strong interest in vintage technology**. For most casual buyers, the risks of damage, cost of restoration, and lack of practical modern use outweigh the benefits.

If you are **not an experienced electronics technician**, it is strongly recommended to avoid purchasing this tube unless you are prepared to invest significant time and effort into learning how to handle, test, and safely operate it. Alternatively, consider starting with more modern or beginner-friendly components before tackling such delicate and high-risk technology.

- **Verification of authenticity and condition** (preferably with a trusted seller or expert).

- **Proper storage** in a controlled environment.

- **Access to high-voltage testing equipment** and safety precautions.

- **A clear understanding of the risks** before attempting any use.

- **Buy only if:** You are a serious collector, have experience with vacuum tubes, or are committed to learning how to safely handle and restore such devices.

- **Avoid if:** You are a beginner, lack proper testing equipment, or do not have the time/patience for potential restoration challenges.

- **Alternative options:** Consider purchasing a **modern solid-state relay** or a **replica/educational thyratron kit** if you want to experiment with switching technology without the risks of a fragile vintage tube.

Would you like guidance on where to find reputable sellers or how to assess the condition of a thyratron if you proceed?

Details:

part #: nl734 price

• $199.90

specifications tubesocketvintagego:

• brand: Ge
• mpn: Nl734
• model: 5544 Nl734
• type: Thyratron Tube
• custom bundle: No
• country of origin: United States

seller tubesocketvintaGego:

• city: Porterville, California
• # reviews: 1680
• rating: 99.8%

offer tubesocketvintaGego:

• quantity: 1
• started: June 10, 2026
• sold: 0
• options: Ship-to-home
• availability: In Stock

shipping tubesocketvintaGego:

• type: Calculated
• transit: 3-7 Days
• class: Standard
• cost: $5.97
• carrier: USPS
• service: USPS Ground AdvantaGe

General tubesocketvintaGego:

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

returns tubesocketvintaGego:

• time: 30 Days
• policy: Returns Accepted
• method: Money back
• paid by: Buyer

payments tubesocketvintaGego:

• other
• credit card: Visa
• wallet: Google-pay

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