BOMAC CBNQ-6130 Antique Tubes Ham Radio Thyratron Military Cbnq

( Brand: Bomac ), ( Manufacturer Part Number: CBNQ-6130 ), ( Part Type: Tube Radio ), ( Modified Item: No ), ( Country Of Origin: United States )

Review BOMAC Lot Of Jan Cbnq 6130 Antique Tubes Ham Radio Thyratron Military

The **BOMAC CBNQ-6130 (CBNQ 6130) Antique Thyratron Tube** is a rare and highly sought-after piece of vintage radio technology, originally developed for military and industrial applications during the mid-20th century. This **gas-filled thyratron** belongs to the **CBNQ series**, a line of high-performance, high-voltage switching tubes designed for demanding environments where reliability and precision were paramount. The CBNQ-6130, in particular, was engineered to operate in **high-power RF amplifiers, radar systems, and early computer circuitry**, where its ability to handle substantial current surges and rapid switching made it indispensable. Its **glass envelope** is meticulously crafted, often featuring a **blue-tinted or amber-hued glass** that enhances visibility of the internal filament and grid structure, while the **metal base** ensures secure mounting and electrical connectivity. Inside, the tube houses a **mercury or gas-filled arc mechanism**, allowing it to function as an **electronic switch** capable of handling voltages up to several thousand volts while maintaining low forward drop and fast recovery times qualities that were critical in early **radar transmitters, military communications, and early digital logic circuits**.

Physically, the CBNQ-6130 exhibits a **distinctive industrial aesthetic**, with its **cylindrical glass bulb** tapering slightly at the top, often adorned with **hand-painted or stenciled markings** identifying its specifications, such as **"CBNQ-6130," "6130," or "U.S. Military Spec."** The **pin configuration** on its **octal or metal base** follows a precise layout, ensuring compatibility with vintage test equipment and modern restoration setups. Unlike modern transistors, this thyratron operates on **vacuum arc principles**, meaning it requires a **filament preheating cycle** before use, a characteristic that adds to its charm and complexity for collectors and hobbyists. Its **high-power handling capabilities** often rated for **amperes of current and kilovolts of voltage** make it a fascinating relic of an era when **vacuum tubes dominated electronics**, long before the advent of solid-state components.

For enthusiasts of **ham radio, vintage electronics, and military history**, the CBNQ-6130 holds immense appeal as both a **functional artifact and a collector s item**. Its **military-grade construction** suggests it may have been used in **WWII-era radar systems, early missile guidance, or classified communications equipment**, making it a tangible link to Cold War-era technology. Restoring and testing such a tube is a rewarding challenge, as it requires **proper filament heating, high-voltage power supplies, and careful handling** to avoid damage. The **rare availability** of these tubes due to their age and specialized applications further drives their desirability among **tube collectors, radio amateurs, and historians**. Whether displayed as a **vintage curiosity** or repurposed in a **modern ham shack for experimental RF projects**, the BOMAC CBNQ-6130 stands as a testament to the ingenuity of early electronic engineering, blending **aesthetic beauty with unparalleled technical performance**.

### **Pros and Cons of buying a Bomac CBNQ-6130 (CBNQ-6130) Antique Thyratron Tube for Ham Radio/Military Use**

The **Bomac CBNQ-6130** (also known as the **CBNQ-6130** or **6130 thyratron**) is a high-power, high-voltage gas-filled tube originally developed for military and industrial applications, including radar systems, power switching, and high-frequency amplification. Below is a detailed breakdown of its advantages and drawbacks, followed by a conclusion and recommendation.

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### **Pros of the Bomac CBNQ-6130**

1. **Extreme Power Handling Capability**

- The **6130 thyratron** is designed to handle **thousands of watts** of RF power, making it suitable for high-power amateur radio (ham) applications, especially in **VHF/UHF linear amplifiers, RF power amplifiers, and keyed transmitters**.

- It can operate in **pulse or CW (continuous wave) modes**, making it useful for **radar simulators, spark gap transmitters, and high-voltage switching circuits**.

2. **Military-Grade Durability**

- Originally manufactured for **military and aerospace use**, these tubes were built to withstand harsh conditions, including **high temperatures, vibration, and high-altitude operation**.

- The **ceramic or metal envelope** provides excellent thermal conductivity, reducing the risk of catastrophic failure from overheating.

3. **High Voltage & Current Ratings**

- The **6130** typically operates at **several kilovolts (e.g., 5 15 kV)** and can handle **hundreds of amps of peak current**, making it ideal for **high-power switching, ignitrons, and RF amplification**.

- Useful in **spark gap transmitters, Tesla coil drivers, and high-voltage rectifier circuits**.

4. **Long Lifespan with Proper Care**

- When **correctly operated and maintained**, thyratrons like the **6130** can last **decades**, especially if used in **low-duty-cycle applications** (e.g., pulsed RF rather than continuous operation).

- Many military surplus thyratrons still function after **50 years** if stored properly.

5. **Versatility in Amateur & Experimental Radio**

- **High-power VHF/UHF amplifiers** (e.g., 50 MHz 500 MHz)

- **Radar simulator projects** (e.g., simulating pulsed radar signals)

- **Spark gap transmitters** (for experimental HF/VHF transmissions)

- **High-voltage switching circuits** (e.g., for Tesla coils, ignitrons)

- Can be **paired with vacuum tubes** (e.g., 4CX series) for **hybrid amplifier designs**.

6. **Availability of Military Surplus & Replacement Parts**

- Since these tubes were mass-produced for the military, **spare parts (envelopes, electrodes, glass-to-metal seals) are sometimes available** from surplus dealers.

- **Replacement electrodes** (e.g., for the grid and anode) can extend the life of a failing tube.

7. **Educational & Historical Value**

- Studying and operating a **military thyratron** provides insight into **vintage electronics, high-voltage engineering, and RF power amplification techniques**.

- Collectors and historians value these tubes for their **technological significance**.

---

### **Cons of the Bomac CBNQ-6130**

1. **High Voltage & Safety Risks**

- Operating at **kilovolts** makes the **6130 extremely dangerous** even a **single misstep can result in fatal electric shock or arc damage**.

- Requires **proper shielding, high-voltage insulation, and safety protocols** (e.g., double-insulated enclosures, warning signs).

- **Arcing inside the tube** can produce **ultraviolet light and ozone**, requiring **ventilation and protective gear**.

2. **Complex Operation & Maintenance**

- **Precise filament heating** (usually **6.3V or 12.6V AC/DC**).

- **Careful grid bias control** to prevent **false triggering**.

- **Proper cooling** (often via **forced air or liquid cooling** in high-power applications).

- **Failure modes** (e.g., **grid erosion, anode pitting, gas leakage**) require **expert troubleshooting**.

3. **Limited Commercial Support**

- **No official service manuals** (must rely on **vintage military specs**).

- **Difficulty finding replacement parts** (e.g., if the glass envelope cracks).

- **No standardized test equipment** for diagnostics.

4. **High Cost & Scarcity**

- **Military surplus thyratrons** (especially in good condition) can be **expensive** ($200 $1,000 depending on rarity).

- **Reconditioning costs** (e.g., **outgassing, electrode replacement**) can be prohibitive for hobbyists.

- **Not all units are functional** many require **extensive testing and repair**.

5. **Incompatibility with Modern Systems**

- **No direct drop-in replacements** exist for the **6130** in most modern circuits.

- **Driver circuits** (e.g., for grid triggering) must be **custom-designed** or adapted from vintage schematics.

- **Not suitable for low-power applications** its size and power requirements make it **overkill for weak-signal HF work**.

6. **Environmental & Storage Challenges**

- **Mercury vapor** (used in some thyratrons) can be a **health hazard** if the tube is **cracked or improperly handled**.

- **Long-term storage** requires **dry, stable conditions** to prevent **electrode corrosion or gas leakage**.

- **Transportation risks** (e.g., **shock, humidity**) can damage the tube.

7. **Performance Limitations in Some Applications**

- **Not ideal for CW or SSB** due to **high power consumption and poor efficiency** compared to modern RF power amplifiers.

- **Thermal management** is critical **overheating can reduce lifespan** or cause **catastrophic failure**.

- **Frequency limitations** while usable in **VHF/UHF**, it may not perform optimally in **HF bands** without additional circuitry.

---

### **Conclusion**

The **Bomac CBNQ-6130 thyratron** is a **powerful, durable, and historically significant** component that excels in **high-power, high-voltage applications** such as **military radar simulators, spark gap transmitters, and experimental RF amplifiers**. Its **military-grade construction** and **ability to handle extreme power levels** make it a **valuable tool for serious hobbyists, engineers, and collectors**.

However, its **high voltage risks, complex operation, limited commercial support, and high cost** make it **impractical for casual users or low-power applications**. Success with a **6130 thyratron** requires:

- **Extensive knowledge of high-voltage electronics**.

- **Proper safety precautions** (insulation, shielding, ventilation).

- **Patience for troubleshooting and maintenance**.

- **A dedicated space for testing and operation**.

For **most amateur radio operators**, modern **RF power amplifiers (e.g., 4CX series tubes, solid-state amplifiers)** provide **better efficiency, reliability, and ease of use**. The **6130 is best suited for:**

- **Experienced experimenters** working on **high-power VHF/UHF projects**.

- **Military surplus enthusiasts** restoring vintage equipment.

- **Educational purposes** in **electronics or RF engineering courses**.

- **Unique applications** where **no modern alternative exists** (e.g., **high-voltage switching, radar simulation**).

---

### **Final Recommendation**

You have **experience with high-voltage electronics** and **proper safety measures** in place.

You are working on a **specific project** (e.g., **spark gap transmitter, radar simulator, high-power amplifier**) where **no modern replacement is available**.

You are willing to **invest time in learning its operation** and **maintaining it properly**.

You are **collecting military surplus** or **preserving vintage technology** for historical purposes.

You are a **beginner in electronics** and lack **high-voltage safety knowledge**.

You need a **reliable, low-maintenance RF amplifier** for **daily ham radio use**.

You cannot **dedicate space and resources** to **proper testing and cooling**.

You are looking for a **cost-effective or easy-to-repair** component.

- For **high-power VHF/UHF amplification**, consider **modern RF power tubes** (e.g., **4CX2500, 4CX1500**) or **solid-state amplifiers** (e.g., **Amplifier Research,

Details:

This listing is for a lot of 4 antique Bomac CBNQ-6130 thyratron radio vacuum tubes. FREE domestic economy shipping handling on this item. N one of these tubes have been tested and therefore they are selling as is. Satisfaction guaranteed.

These tubes are all in nice cosmetic condition and of the bases top caps tight. I have too many tubes and not enough time to test them all, so some are selling in untested lots save.

part #: cbnq6130 prices

• $15.00-$35.95

specifications tubesocketvintagego:

• brand: Bomac
• mpn: Cbnq-6130
• part type: Tube Radio
• modified item: No
• country of origin: United States

offer tubesocketvintagego:

• availability: In Stock
• started: March 17, 2026
• options: Ship-to-home
• sold: 0
• quantity: 1

payments tubesocketvintagego:

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

general tubesocketvintagego:

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

shipping tubesocketvintagego:

• type: Fixed
• cost: $0.00
• service: USPS Ground Advantage, USPS Priority Mail
• carrier: USPS
• transit: 3-8 Days
• class: Standard, Expedited

seller tubesocketvintagego:

• rating: 100.0%
• # reviews: 12984
• city: Avilla, Indiana

returns tubesocketvintagego:

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

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