MILITARY / AIRCRAFT RADIO CORP T-21-ARC-5 Wwii Transmitter Corp. T-21/ARC-5 5.3-7

( Brand: Military / Aircraft Radio Corp ), ( Manufacturer Part Number: T-21/ARC-5 ), ( Model: T-21 ), ( Type: Aircraft Radio Transmitter ), ( Unit Type: Unit ), ( Number Of Channels: Variable ), ( Color: Black ), ( Band: Hf ), ( Compatible Product: Arc-5 Aircraft Radio Systems ), ( Country Of Origin: United States )

Review MILITARY / AIRCRAFT RADIO CORP Corp. T-21/arc-5 Vintage Wwii 5.3-7 Mhz Range Transmitter

The **T-21/ARC-5** was a rugged, high-performance military aircraft radio transmitter developed during World War II as part of the U.S. Army s **AN/ARC-5** series, specifically designed for use in the **B-17 Flying Fortress, B-24 Liberator, and other heavy bombers** of the era. Produced in 1944 by **General Electric s Radio Corporation of America (RCA)** division, this **5.3 7 MHz (60 43 meter band) transmitter** was engineered to provide reliable, long-range communications under the harshest combat conditions, where reliability was paramount. Built to withstand extreme vibrations, temperature fluctuations, and mechanical stress, the T-21/ARC-5 featured a **compact yet robust chassis** constructed from high-grade aluminum and steel, with a **hermetically sealed vacuum tube assembly** to ensure durability in high-altitude operations. Its **tuned circuit design** allowed for precise frequency selection, enabling pilots to maintain secure voice and Morse code transmissions over vast distances, even when evading enemy interception. The transmitter operated on **12-volt DC power**, drawing from the aircraft s electrical system, and was paired with the **AN/ARC-5 receiver** to form a complete **VHF (Very High Frequency) radio suite**, a critical component in coordinating bomber formations, navigating over enemy territory, and coordinating with ground control. Its **adjustable power output** ranging from **10 to 100 watts** allowed operators to balance range and battery efficiency, while its **crystal-controlled tuning** minimized drift, ensuring stable communications in the chaotic environment of wartime flight. Often mounted in the **radio operator s compartment** or near the cockpit, the T-21/ARC-5 became synonymous with the Allied bombing campaign, playing a vital role in the **Eighth Air Force s daylight raids over Germany** and the **Pacific Theater s island-hopping operations**. Today, surviving examples of this historic equipment are highly sought after by collectors, aviation enthusiasts, and military historians, serving as tangible remnants of the technological advancements that shaped modern aviation communications.

Buying a vintage military aircraft radio like the **T-21/ARC-5 (5.3 7 MHz transmitter, 1944)** can be an intriguing pursuit for collectors, historians, or hobbyists interested in World War II-era aviation technology. However, there are significant pros and cons to consider before making such a purchase.

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### **Pros of Buying a WWII T-21/ARC-5 Transmitter**

1. **Historical Significance**

The T-21/ARC-5 was a critical component of early aviation radio communication, used in aircraft like the P-51 Mustang, B-17 Flying Fortress, and other WWII-era planes. Owning one connects you to military aviation history, offering a tangible link to the era.

2. **Collectible Value**

Well-preserved examples, especially those with original documentation or known service histories, can appreciate in value over time. Some collectors pay premiums for authentic, rare, or restored units.

3. **Technical Curiosity**

Studying the internal workings of a 1944-era transmitter provides insight into early radio frequency (RF) design, vacuum tube technology, and military engineering. It can be a fascinating subject for electronics enthusiasts or historians.

4. **Potential for Restoration and Use**

- **Reenactment groups** (e.g., WWII aviation displays, airshows).

- **Amateur radio experimentation** (with proper licensing and modifications).

- **Educational demonstrations** (e.g., in museums or schools).

5. **Unique Aesthetic Appeal**

The robust, utilitarian design of military radios from this era has a distinct charm, appealing to those who appreciate vintage military hardware.

6. **Potential for Resale or Trade**

If you acquire it for investment purposes, a well-documented unit could be sold or traded to other collectors, museums, or aviation enthusiasts.

---

### **Cons of Buying a WWII T-21/ARC-5 Transmitter**

1. **High Cost**

Authentic, well-preserved examples especially those with original parts or service records can be expensive. Prices often range from **$1,000 to $5,000 **, depending on condition and rarity. Restored units may cost even more.

2. **Maintenance and Repair Challenges**

- **Obsolete Parts:** Many components (vacuum tubes, capacitors, resistors) are no longer manufactured. Sourcing replacements requires specialized suppliers or eBay searches.

- **Corrosion and Wear:** Decades of exposure to moisture, temperature fluctuations, and handling can cause internal corrosion, broken solder joints, or degraded insulation.

- **Lack of Modern Tools:** Diagnosing and repairing RF circuits from this era often requires vintage test equipment (e.g., old oscilloscopes, signal generators) or patience in adapting modern tools.

3. **Functional Limitations**

- **Narrow Frequency Range:** The 5.3 7 MHz range is outdated by modern standards and may not be useful for contemporary aviation or amateur radio without significant modification.

- **Power and Efficiency:** Early transmitters were less efficient than modern designs, requiring more power input for the same output.

- **Legal Restrictions:** Operating it on amateur bands without proper licensing (or modifying it for modern use) could violate regulations.

4. **Risk of Counterfeit or Poor Condition Units**

- **Originality** (serial numbers, markings, documentation).

- **Structural integrity** (no internal corrosion, cracked chassis).

- **Functionality** (testing may be difficult without proper equipment).

5. **Storage and Handling Risks**

- **Sensitivity to Environment:** Vacuum tubes and early electronics are vulnerable to humidity, dust, and temperature extremes.

- **Physical Fragility:** Older units may have brittle wiring, cracked casings, or loose components.

6. **Ethical and Legal Considerations**

- **Provenance Issues:** Some units may have been looted from war graves or improperly sourced. Ethical collectors avoid such items.

- **Export Restrictions:** If purchasing from abroad, customs regulations may apply, especially for military hardware.

7. **Limited Practical Use**

Unlike modern radios, this transmitter is not practical for everyday communication. Its primary value lies in **collecting, historical study, or display** rather than functional use.

---

### **Conclusion**

- A strong interest in **military history or electronics**.

- The **time, skills, and patience** to restore or maintain it.

- A **clear purpose** (collecting, display, or experimentation) rather than practical use.

If you are primarily interested in **operational use**, modern amateur radio gear would be a far more practical and affordable investment. However, if you seek a **piece of aviation history** and are prepared for the challenges of ownership, a well-researched purchase could be rewarding.

---

### **Recommendation**

1. **Verify Authenticity and Condition**

- Inspect for original markings, serial numbers, and documentation.

- Test functionality if possible (or hire an expert to do so).

- Avoid units with obvious repaints, missing parts, or corrosion.

2. **Budget for Restoration**

- Factor in costs for **vacuum tubes, test equipment, and labor** if restoration is needed.

- Consider whether you can perform repairs yourself or need professional help.

3. **Determine Your Purpose**

- If buying for **collection**, prioritize historical accuracy and documentation.

- If buying for **use**, research whether modifications are legally permissible and practical.

4. **Purchase from Reputable Sources**

- Trusted dealers (e.g., **Military Surplus Exchange, eBay sellers with verified feedback, or auction houses**).

- Avoid private sellers unless they provide thorough documentation.

5. **Consider Alternatives**

- If you want **functional WWII-era radio experience**, a **restored B-17 or P-51 radio set** (with all components) may be more practical.

- For **modern experimentation**, a **vintage-style amateur radio kit** (e.g., a restored ARC-5 receiver or a modern replica) could be a better balance of history and usability.

Ultimately, this transmitter is a **high-maintenance collectible** rather than a practical tool. Proceed with careful research, realistic expectations, and a clear plan for its care or use.

Details:

Vintage WWII T-21/ARC-5.3-7 MHz Range Aircraft Radio Transmitter, 1944, Has partial tube set, missing one 1625 and tuning crystal, Cover plate over output tubes is not present, present.

part #: t21arc5 price

• $49.00

specifications hamamateuradio:

• brand: Military / Aircraft Radio Corp
• mpn: T-21/arc-5
• model: T-21
• type: Aircraft Radio Transmitter
• unit type: Unit
• number of channels: Variable
• color: Black
• band: Hf
• compatible product: Arc-5 Aircraft Radio Systems
• country of origin: United States

payments hamamateuRadio:

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

seller hamamateuRadio:

• # reviews: 2348
• city: Flint, Michigan
• rating: 100.0%

general hamamateuRadio:

• condition: Used
• Radio Communication > Ham, Amateur Radio > Ham Radio Transmitters

shipping hamamateuRadio:

• carrier: USPS
• cost: $11.79
• class: Standard
• type: Calculated
• transit: 4-11 Days
• service: USPS Ground Advantage

offer hamamateuRadio:

• best offers: True
• options: Ship-to-home
• availability: In Stock
• quantity: 1
• sold: 0
• started: March 10, 2026

returns hamamateuRadio:

• policy: No Returns

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