HYTRON VT-24 Triode Radios Rebased Base WD-11 864

( Brand: Hytron ), ( Manufacturer Part Number: VT-24 ), ( Model: VT-24 WITH WD-11 BASE ), ( Type: Vt-24 Re-based ), ( Staus: Strong Tv-7 Tests ), ( Application: Vintage Radios ), ( Country Of Origin: United States )

Review HYTRON Aka 864 Triode Vintage Radios Rebased Base

The **Hytron VT-24/WD-11 (864 Triode)** is a meticulously crafted, high-performance vacuum tube designed to deliver exceptional audio fidelity and reliability in vintage radio restoration and modern tube amplifier applications. This versatile triode tube, often referred to by its original designation as the **864**, is a direct descendant of the classic **WD-11** and **VT-24** variants, offering a refined blend of power handling and sonic clarity that appeals to both purists and enthusiasts. With a robust construction featuring a **9-pin octal base**, it is engineered to provide stable operation in a variety of circuits, from high-fidelity audio amplifiers to sensitive radio receivers, where its balanced characteristics ensure minimal distortion and maximum signal integrity.

The **864 Triode** excels in applications requiring precise voltage amplification, making it an ideal choice for preamplifier stages, RF amplifiers, and even certain types of oscillator circuits in vintage radio setups. Its **low noise figure** and **high transconductance** contribute to a rich, detailed sound with excellent headroom, allowing it to handle both delicate signals and robust audio inputs with equal finesse. The tube s **directly heated cathode** ensures consistent performance across a wide range of operating voltages, while its **well-balanced plate and grid characteristics** minimize crossover distortion, delivering a smooth, dynamic listening experience.

For radio enthusiasts, the **VT-24/WD-11 (864)** is particularly prized in **superheterodyne receivers**, **regenerative circuits**, and **detector stages**, where its ability to amplify weak signals with clarity and reduce interference is invaluable. Its **reliability under varying conditions** including temperature fluctuations makes it a dependable component for both static displays and active restoration projects. Whether used in a **rebuilt 1950s-era radio** or integrated into a **modern tube amplifier**, this tube offers a timeless performance that bridges the gap between vintage craftsmanship and contemporary audio demands.

Available in **new production runs** from reputable manufacturers, the **VT-24/WD-11 (864)** is often sourced from high-quality tube factories that adhere to strict manufacturing standards, ensuring consistent performance and longevity. Its **universal compatibility** with a wide range of circuits from **AC- and DC-powered radios** to **tube preamps and oscillators** makes it a versatile addition to any collector s inventory. For those seeking a tube that combines **historical authenticity with modern reliability**, the **864 Triode** stands as a testament to the enduring legacy of vacuum tube technology, delivering both functional excellence and sonic warmth in every application.

Buying a **Hytron VT-24 (WD-11, aka 864 Triode)** for radio rebuilding, particularly as a replacement for a base unit, involves several considerations. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Hytron VT-24 (WD-11 / 864 Triode)**

1. **Compatibility with Classic Radio Schemes**

The VT-24 is a direct replacement for the **864 triode**, a tube widely used in mid-20th-century radios (1940s 1960s). Many vintage radios, particularly those from brands like **Hytron, Philco, RCA, and others**, were designed with this tube in mind. This makes it an ideal choice for restoring or rebuilding original circuitry without major modifications.

2. **High-Gain Performance**

The 864 triode is known for its **high amplification factor ( 100)** and **moderate plate dissipation**, making it suitable for audio amplification stages. It provides strong gain, which is useful in radio receivers where signal amplification is critical for weak signals.

3. **Availability and Cost**

While not as common as some other tubes (like the 6SK7 or 12AT7), the VT-24/864 is still **relatively affordable** compared to rare or obsolete tubes. It can often be found in **new stock from tube suppliers** (e.g., Sylvania, Mullard, or Chinese manufacturers) or as a replacement part for vintage radios.

4. **Durability and Longevity**

Like most glass-envelope tubes of its era, the VT-24 is built to last. With proper handling (avoiding excessive heat, vibration, or voltage spikes), it can provide **years of reliable service**. Many original 864 tubes from the 1950s 60s still function perfectly today.

5. **Direct Drop-In Replacement**

Since the VT-24 is a **1:1 replacement** for the 864, it can be installed without modifying the socket or surrounding circuitry. This is a major advantage for hobbyists who want to preserve the original design of a radio.

6. **Good for Audio Applications**

While primarily used in radio IF (intermediate frequency) and RF (radio frequency) stages, the VT-24 also performs well in **audio amplifier stages** due to its balanced characteristics. It avoids the hum and distortion issues that can plague some modern replacements.

7. **Supporting a Niche Market**

Buying a VT-24 helps sustain the **vintage radio restoration community**. Many suppliers and hobbyists specialize in these tubes, ensuring continued availability for enthusiasts.

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### **Cons of the Hytron VT-24 (WD-24 / 864 Triode)**

1. **Limited Modern Production**

While still available, the **VT-24 is not as widely produced as some other tubes** (e.g., 12AX7, 6BA6). This means supply chains can be **less stable**, and prices may fluctuate based on demand.

2. **Sensitivity to Voltage and Heat**

Like all vacuum tubes, the VT-24 is **vulnerable to overvoltage and excessive heat**. Running it at incorrect voltages (especially plate voltage) can cause **grid emission or premature failure**. Proper biasing and power supply regulation are essential.

3. **No Built-In Protection**

Unlike modern transistors or ICs, the VT-24 has **no inherent protection** against reverse polarity, short circuits, or power surges. A miswired radio could damage the tube instantly.

4. **Replacement Parts May Vary**

Some **Chinese-made or aftermarket VT-24 tubes** may have **slightly different characteristics** (e.g., slightly lower gain or different filament resistance) compared to original Sylvania or Mullard versions. While usually not a major issue, this can affect tone or sensitivity in some radios.

5. **Filament Voltage Requirements**

The VT-24 requires **6.3V AC or DC** for its filament. If the radio s power supply is not compatible (e.g., using a **6.3V transformer** or a **filament regulator**), additional modifications may be needed.

6. **Not Ideal for Modern Low-Voltage Circuits**

Some newer or modified radios may use **lower voltage supplies** (e.g., 12V or 24V) that aren t optimized for the VT-24 s original operating conditions. This can lead to **reduced performance or tube stress**.

7. **Limited Availability of Test Equipment**

While tube testers exist, **not all are calibrated for the VT-24 s exact parameters**. Some hobbyists may need to **manually check plate current and voltage** to confirm proper operation.

8. **Environmental Sensitivity**

Vacuum tubes are **affected by humidity, dust, and contamination**. If stored improperly (e.g., in a damp or dirty environment), the tube s performance may degrade over time.

---

### **Conclusion**

The **Hytron VT-24 (WD-11 / 864 Triode)** is an **excellent choice** for rebuilding or restoring **mid-century radios** where the original tube was a 864. Its **high gain, direct compatibility, and reliability** make it a favorite among vintage radio enthusiasts. However, it is **not a "one-size-fits-all" solution** it requires **proper handling, correct voltage supplies, and some basic knowledge of tube operation** to avoid issues.

For **modern radios or heavily modified circuits**, alternatives like the **12AX7, 6BA6, or even modern replacements (e.g., 864-compatible tubes from manufacturers like **Sylvania or Chinese brands**) may be considered**. But for **authentic restoration work**, the VT-24 remains one of the best options available.

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### **Final Recommendation**

- You are restoring a **vintage radio that originally used an 864 triode**.

- You have a **6.3V filament supply** (or can modify the circuit accordingly).

- You are comfortable with **basic tube handling and testing**.

- You prefer **high-gain performance** in audio or RF stages.

- The radio s power supply is **not compatible** with 6.3V filament requirements.

- You are working with a **modern or heavily modified circuit** where an 864 may not be ideal.

- You need **higher reliability in a harsh environment** (e.g., portable radios with frequent movement).

For most **classic radio rebuilds**, the **VT-24 is a solid, well-supported choice** just ensure proper installation and operation to maximize its lifespan. If in doubt, consult **vintage radio forums or tube experts** before purchasing.

Details:

A reading of 16 is the minimum recommended. Hickok TV-7D/U test reads 25. RARE - Improved WD-11. 6C4 1 Hytron VT-24 aka 864 Vacuum Tubes.

part #: vt24 prices

• $6.88-$11.99

specifications tubesocketvintagego:

• brand: Hytron
• mpn: Vt-24
• model: Vt-24 With Wd-11 Base
• type: Vt-24 Re-based
• staus: Strong Tv-7 Tests
• application: Vintage Radios
• country of origin: United States

offer tubesocketvintagego:

• sold: 0
• options: Ship-to-home
• quantity: 1
• started: February 9, 2026
• availability: In Stock

general tubesocketvintagego:

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

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• rating: 99.8%
• city: Entiat, Washington
• # reviews: 21142

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