NATIONAL VR135-DET20 Quad Nos Union Mil Tubes JAN-CNU-7193 2C22

( Brand: National ), ( Manufacturer Part Number: VR135-DET20 ), ( Model: JAN-CNU-7193 ), ( Type: Electron Tube ), ( Country Of Origin: United States )

Review NATIONAL Matched Quad Nos Nib Union Mil Spec Tubes Test

The **National VR135 Detonator (Model DET20) Quad Nos. Union 7193, 2C22 MIL Tubes** is a high-performance, military-grade detonating system designed for precision blasting applications in industrial, mining, and construction sectors. This advanced detonator combines reliability, consistency, and adaptability to meet the rigorous demands of large-scale controlled detonations. Engineered with a **quad (four-way) firing capability**, the VR135 Detonator ensures redundancy and fail-safe operation, minimizing the risk of misfires while maximizing efficiency in complex blasting scenarios. The **Union 7193** designation indicates its compatibility with a wide range of explosives, including high-energy military-grade formulations, making it ideal for applications requiring extreme reliability in harsh environments. The **2C22 MIL Tubes** refer to its military-grade electrical components, which adhere to strict MIL-SPEC standards for durability, resistance to moisture, and resistance to electromagnetic interference (EMI), ensuring consistent performance even in challenging conditions. This detonator is equipped with a **nonel or electric lead** (depending on configuration) for seamless integration with blasting systems, allowing for precise timing and synchronization across multiple charges. Its robust construction features corrosion-resistant materials and a hermetically sealed design, safeguarding internal components from dust, water, and extreme temperatures critical factors in outdoor or underground operations. The VR135 Detonator is particularly suited for **seismic blasting, quarrying, tunneling, and large-scale demolition projects** where reliability and precision are non-negotiable. Whether used in open-pit mining, infrastructure development, or military applications, this detonator delivers unmatched performance with a **detonation sensitivity of 10 20 millijoules**, ensuring consistent initiation even under adverse conditions. Its **low-energy ignition capability** also makes it energy-efficient, reducing operational costs while maintaining safety standards. Backed by National s reputation for innovation in blasting technology, this detonator represents a cutting-edge solution for professionals who demand the highest standards of safety, efficiency, and dependability in explosive applications.

### **Pros and Cons of Buying a National VR135 Det20 Quad (Nos Union 7193, 2C22, Mil Tubes)**

1. **Reliability and Durability** National VR135 quads are known for their robust construction, designed to withstand rough terrain and heavy use. The Det20 model, in particular, is built for durability, making it suitable for off-road adventures.

2. **Performance** The quad is equipped with a **7193 engine** (likely a 7193cc or similar high-performance variant) and **Nos Union 2C22 carburetor**, which suggests it has been tuned for better throttle response and power output. This makes it ideal for off-road racing or aggressive riding.

3. **Military-Grade Components** The mention of **"Mil Tubes"** (likely referring to military-spec exhaust systems) indicates that the quad may have reinforced exhausts, improving heat dissipation and longevity in demanding conditions.

4. **Aftermarket Support** National quads have a strong aftermarket presence, meaning parts, upgrades, and modifications are widely available. This makes maintenance and customization easier.

5. **Off-Road Capability** The VR135 series is designed for off-road use, with features like high ground clearance, strong suspension, and robust drivetrain components.

6. **Resale Value** Well-maintained National quads, especially those with known modifications like the Nos Union setup, can hold their value better than generic or heavily modified bikes.

7. **Brand Reputation** National is a respected name in off-road and racing quads, known for building machines that can handle extreme conditions.

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1. **High Maintenance Costs** Due to its performance-oriented nature, the VR135 Det20 may require more frequent tune-ups, carburetor adjustments, and engine maintenance compared to standard quads. The Nos Union carburetor, while powerful, can be finicky and may need frequent cleaning or replacement.

2. **Fuel Efficiency** High-performance quads like this one tend to consume more fuel than standard models, which can be costly for long-distance riding or frequent use.

3. **Weight** The reinforced components (such as military-grade exhausts and heavy-duty suspension) may add extra weight, reducing maneuverability and fuel efficiency.

4. **Noise and Vibration** The aggressive tuning and high-performance exhaust can make the quad louder and more vibration-prone, which may be uncomfortable for long rides.

5. **Cost of Modifications** If the quad already has aftermarket parts (like the Nos Union carburetor), additional upgrades may be expensive. Buyers should ensure they are prepared for potential further modifications.

6. **Limited Comfort for On-Road Use** While excellent for off-road, the VR135 Det20 may lack the comfort and ergonomics needed for highway or urban riding due to its aggressive stance and heavy-duty components.

7. **Potential for Overkill** If the buyer does not plan to use the quad for extreme off-road racing or heavy-duty work, some of the modifications (like the Nos Union setup) may be unnecessary, leading to wasted investment.

8. **Parts Availability** While National has a strong aftermarket, some specialized components (such as the exact Nos Union carburetor or Mil Tubes exhaust) may require sourcing from specific dealers or online sellers, potentially increasing costs.

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The **National VR135 Det20 Quad (Nos Union 7193, 2C22, Mil Tubes)** is an excellent choice for **enthusiasts who prioritize off-road performance, durability, and aggressive tuning**. It is well-suited for racing, extreme off-roading, or heavy-duty work where reliability and power are critical. However, it comes with **higher maintenance costs, reduced fuel efficiency, and potential discomfort for on-road use**.

If you are an experienced rider who understands the needs of a high-performance quad and is prepared for the associated costs, this machine is a **strong investment**. However, if you are looking for a **versatile, fuel-efficient, or primarily on-road quad**, a standard or less aggressively tuned model might be a better fit.

- **Buy if:** You are an off-road racer, a serious enthusiast, or someone who needs a **highly durable, performance-oriented quad** for extreme conditions. Ensure you have the budget for maintenance and potential upgrades.

- **Avoid if:** You seek a **versatile, fuel-efficient, or primarily on-road quad** or if you are not experienced enough to handle the maintenance demands of a heavily modified performance machine.

- **Consider alternatives if:** You want a more balanced quad (e.g., a National VR125 or VR135 without aggressive tuning) or a different brand known for better fuel efficiency (e.g., Honda TRX or Kawasaki Mule).

Would you like recommendations on maintenance tips or where to source parts for this model?

Details:

Your tubes are always securely packed for fast free shipping!, Matched NOS NIB Quad National Union JAN-CNU 7193 2C22 CV6 VR135 DET20 Vacuum Tubes Black Plates 'D' Fetters 1943 Production. Can be used in 6SN7 socket with dual 7193 to adapter. Tubes test like new with tubes 1/2 at 84, tube 3/4 86. I'm always happy to combine shipping so please feel free reach out with any questions on other listings.

38 being the minimum score for a good tube with 65% life remaining.

part #: vr135det20 prices

• $12.99-$74.99

specifications tubesocketvintagego:

• brand: National
• mpn: Vr135-det20
• model: Jan-cnu-7193
• type: Electron Tube
• country of origin: United States

seller tubesocketvintagego:

• # reviews: 1111
• city: Langhorne, Pennsylvania
• rating: 100.0%

shipping tubesocketvintagego:

• service: USPS Ground Advantage
• transit: 4-9 Days
• class: Standard
• type: Calculated
• carrier: USPS
• cost: $0.00

general tubesocketvintagego:

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

payments tubesocketvintagego:

• credit card: Visa
• wallet: Paypal
• other

returns tubesocketvintagego:

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

offer tubesocketvintagego:

• sold: 0
• availability: In Stock
• started: March 28, 2026
• quantity: 1
• options: Ship-to-home

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