EIMAC High Mu Power Triode Kilowatt Volt 60

( Brand: Eimac ), ( Manufacturer Part Number: 3CV30000H3 ), ( Type: Triode ), ( Unit Type: Unit ), ( Country Of Origin: United States )

Review EIMAC Rare High Mu Power Triode 3cv30 000h3 60 Kilowatt Volt

The **Eimac 3CV30000H3** is a monumental and highly specialized high-mu power triode, engineered to deliver unparalleled performance in demanding radio frequency (RF) applications, particularly in high-power broadcast, industrial heating, and experimental high-voltage systems. This massive triode belongs to the legendary **3CV30** series, a line of vacuum tubes renowned for their robustness, efficiency, and ability to handle extreme power levels with minimal distortion. The **3CV30000H3** variant is specifically optimized for high-mu (amplification factor) operation, meaning it offers exceptional gain while maintaining stable operation under high-voltage conditions, making it ideal for applications where signal amplification and power output are critical.

Weighing in at an impressive scale, the **3CV30000H3** is a physically imposing component, designed to dissipate vast amounts of heat generated during operation. Its construction incorporates heavy-duty materials, including a robust glass or ceramic envelope reinforced with metal reinforcements to withstand the immense thermal and mechanical stresses associated with 60-kilowatt power levels. The tube features a **10-volt filament** (or cathode) configuration, which, while seemingly modest, is carefully balanced to ensure reliable operation when paired with the appropriate power supply and external circuitry. The filament s design allows for efficient heating while minimizing energy loss, a crucial consideration in high-power applications where thermal management is paramount.

At the heart of the **3CV30000H3** lies its **three-grid structure**, which distinguishes it from simpler diode or tetrode designs. The **control grid, screen grid, and suppressor grid** work in concert to modulate the electron flow between the cathode and anode (plate), enabling precise control over signal amplification with minimal interference. The high-mu characteristic of this triode ensures that small changes in grid voltage result in proportionally large changes in plate current, making it exceptionally sensitive for applications requiring fine-tuned RF amplification. This sensitivity, combined with its ability to handle **60 kilowatts of RF power**, positions the **3CV30000H3** as a workhorse in systems where high-frequency transmission, industrial heating, or experimental electronics demand reliability and performance beyond conventional solid-state alternatives.

The **3CV30000H3** is not merely a power amplifier but a **high-voltage marvel**, capable of operating at plate voltages exceeding 20,000 volts in properly configured circuits. This extreme voltage handling capability is essential for applications such as **high-power broadcast transmitters**, where it can drive antennas with minimal signal degradation, or in **industrial RF heating systems**, where its ability to efficiently convert electrical energy into high-frequency thermal energy is invaluable. The tube s design also incorporates **spiral or helical focusing structures** within the envelope to ensure that the electron beam remains tightly focused on the plate, reducing internal losses and improving overall efficiency.

For those working with this extraordinary component, proper handling and installation are non-negotiable. Due to its size, weight, and high-voltage requirements, the **3CV30000H3** must be mounted securely in a well-ventilated enclosure to prevent overheating, and its power supply must be carefully regulated to avoid voltage spikes or fluctuations that could damage the tube. Additionally, the **filament voltage (10V) and current requirements** must be met precisely to ensure longevity and optimal performance. When properly utilized, this triode can operate for thousands of hours, making it a cost-effective solution for high-power RF applications where durability and performance are critical.

Beyond its technical specifications, the **Eimac 3CV30000H3** represents a legacy of innovation in vacuum tube technology. Eimac, a division of Varian, has long been synonymous with high-power electronics, and this tube is a testament to their expertise in designing components that push the boundaries of what is possible in RF amplification. Whether used in **experimental physics research, industrial applications, or vintage radio restoration**, the **3CV30000H3** remains a symbol of raw, unfiltered power where vacuum tube technology still reigns supreme in the most demanding environments. For enthusiasts, engineers, and technicians alike, this triode is not just a component; it is a piece of engineering history, capable of delivering **60 kilowatts of clean, high-mu amplified power** with the precision and reliability that only the finest vacuum tubes can provide.

### **Pros and Cons of buying a Eimac 3CV30000H3 High-Mu Power Triode (3CV30/000H3, 60 kW, 10V)**

#### **Pros**

1. **Extreme Power Handling** The 3CV30000H3 is one of the most powerful triodes ever made, capable of dissipating **60 kW** of RF power. This makes it ideal for high-power amateur radio, experimental transmitters, or industrial RF applications where standard tubes fall short.

2. **High Efficiency** As a high-mu ( ) triode, it offers better control grid efficiency compared to lower-mu tubes, reducing drive requirements and improving overall transmitter performance.

3. **Durability and Robust Construction** Eimac tubes are known for their ruggedness, often built with heavy-duty construction, including reinforced glass, metal seals, and robust internal structures to withstand high power and thermal stress.

4. **Versatility in High-Power Applications** Suitable for **VHF/UHF linear amplifiers, experimental HF transmitters, and industrial RF heating systems**. Its 10V filament voltage is standard for many high-power tube designs, making it compatible with existing power supplies.

5. **Historical and Collectible Value** For enthusiasts, owning such a rare and powerful tube can be a significant achievement, especially since production of such high-power tubes has largely ceased.

6. **Potential for Custom and Experimental Use** Engineers and hobbyists can use it in bespoke RF amplifiers, plasma experiments, or even as a component in specialized electronics where standard tubes are insufficient.

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#### **Cons**

1. **Extremely High Cost** Due to its rarity, specialized manufacturing, and the fact that Eimac no longer produces such high-power tubes, the price is likely to be **several thousand dollars**, making it impractical for most amateur radio operators.

2. **Power Supply and Cooling Requirements** Operating at 60 kW requires a **high-voltage, high-current power supply** (likely in the range of **10 20 kV** for plate voltage) and **advanced cooling systems** (water or forced-air cooling). Most home setups lack the infrastructure to safely operate such a tube.

3. **Maintenance and Expertise Needed** Handling a tube of this power level requires **specialized knowledge** in RF engineering, high-voltage safety, and tube maintenance. A single misstep could lead to catastrophic failure or even injury.

4. **Limited Availability of Spare Parts** Since Eimac no longer manufactures such tubes, finding replacements for internal components (filaments, seals, etc.) is nearly impossible. Any failure could render the tube unusable.

5. **Legal and Regulatory Restrictions** In many countries, transmitting at such high power levels requires **special licensing, frequency restrictions, and compliance with RF radiation safety standards**. Unauthorized operation could lead to fines or legal action.

6. **Impractical for Most Users** For the average amateur radio operator, a 60 kW tube is **overkill**. Most legal amateur power limits (e.g., 1.5 4 kW in many jurisdictions) make such a tube unnecessary for standard communications.

7. **Risk of Damage from Misfires or Overloads** Due to its size and power, even minor misalignments or overdriving can cause **internal arcing, filament burnout, or catastrophic glass failure**, leading to expensive repairs or total loss.

8. **No Active Support or Warranty** Unlike modern solid-state amplifiers, there is **no manufacturer support, warranty, or technical assistance** available for such an old and specialized tube.

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### **Conclusion**

The **Eimac 3CV30000H3** is an **exceptional piece of engineering** one of the most powerful triodes ever made but its **extreme power handling, cost, and operational complexity** make it **impractical for most users**. It is best suited for:

- **Serious experimental RF engineers** with access to high-power infrastructure.

- **Collectors and enthusiasts** interested in historical electronics.

- **Industrial or military applications** where such power is genuinely required.

For **amateur radio operators, hobbyists, or casual users**, a **modern solid-state amplifier** (e.g., 1.5 4 kW linear amps) or a **high-power tetrode/pentode** (such as the **4CX15000A** or **3-500Z**) would be a far more practical and safer choice.

### **Recommendation**

- A **dedicated high-power lab** with proper shielding, cooling, and safety measures.

- **Extensive experience** in RF engineering and tube-based transmitters.

- **Legal authorization** to operate at such power levels.

- **Consider alternatives** (e.g., **Eimac 4CX15000A, 3-500Z, or modern solid-state amps**) if you need high power but want a more manageable solution.

- If acquiring for **collecting purposes**, ensure you have a **secure, controlled environment** to prevent accidental damage.

For most users, the **3CV30000H3 is a "showpiece" rather than a practical tool** its true value lies in its **historical significance and engineering marvel status** rather than everyday usability.

Details:

YOU COLLECTORS AND END USERS KNOW WHAT YOUR LOOKING AT, IM OPEN TO OFFERS, RARE AS THE COME IVE SEEN PRICES OF 8-$12000 SAME THIS ONE. AND DATA SPECS INCLUDED AS SCREENSHOTS ONLY no papers. SOLD AS IS FOR PARTS OR REBUILD LOOKS VERY CLEAN almost unused. RARE EIMAC 3CV30000H3 High Mu Power Triode 3CV30 000H3 60 Kilowatt 10,000 Volt.

part #: 3cv30000h3 price

• $5697.15

specifications hamamateuradio:

• brand: Eimac
• mpn: 3cv30000h3
• type: Triode
• unit type: Unit
• country of origin: United States

general hamamateuradio:

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

payments hamamateuradio:

• wallet: Google-pay
• credit card: Diners-club
• other

shipping hamamateuradio:

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

seller hamamateuradio:

• city: Brunswick, Maryland
• # reviews: 8614
• rating: 100.0%

returns hamamateuradio:

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

offer hamamateuradio:

• quantity: 1
• best offers: True
• availability: In Stock
• sold: 0
• options: Ship-to-home
• started: February 4, 2026

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