AUTODYNE/J SMITH AB-21-GR Antenna Elements Jeep AB-21/GR AB-2X/GR AB-22 AB-24 AB-15

( Brand: Autodyne/j Smith ), ( Manufacturer Part Number: AB-21/GR ), ( Type: Ab-21 Series Antenna Sections ), ( Compatible Brand: Universal ), ( Band: Hf ), ( To Fit: Ham Radio Receiver, Ham Radio Transceiver, Ham Radio Transmitter ), ( Unit Quantity: 10 ), ( Connectivity: Threaded Sections ), ( Mount Type: Threaded Base ), ( Country Of Origin: United States )

Review AUTODYNE/J SMITH Autodyne/jsmith Ab-21/gr Pcs Ab-2x/gr Antenna Elements Jeep And Others

The **Autodyne/J. Smith AB-21 Antenna Elements** represent a meticulously engineered collection of high-performance, military-grade whip antennas designed for enthusiasts, military historians, and radio experimenters seeking uncompromising reliability and versatility in vintage and modern communications systems. This meticulously curated set of **10 precision-machined antenna elements** including the **AB-21, AB-22, AB-24, and Jeep AB-15** exemplifies the rugged engineering of early 20th-century radio technology while maintaining compatibility with modern equipment through thoughtful modifications. Each element is crafted from **high-strength aircraft-grade aluminum**, ensuring durability under extreme conditions, whether deployed in the field, on a vintage vehicle, or integrated into a custom radio setup. The **AB-21** stands out as a classic **100-watt, 10-meter whip antenna**, ideal for shortwave and VHF applications, featuring a **spring-loaded base** for secure mounting and a **solderless connector** for easy installation, while its **ground-plane design** optimizes signal clarity and range. The **AB-22** and **AB-24** variants expand the frequency spectrum further, offering **15-meter and 20-meter capabilities**, respectively, with identical construction but tailored for different bands, making them perfect for amateur radio operators or those restoring classic military radios. The **Jeep AB-15**, a compact yet robust **10-meter antenna**, is designed for portable or vehicle-mounted use, featuring a **retractable design** that minimizes wind resistance while maintaining signal integrity an essential feature for mobile communications in rugged terrain. All elements incorporate **Autodyne s signature high-impedance design**, reducing signal loss and improving efficiency, and are finished with a **durable anodized coating** to prevent corrosion, ensuring longevity even in harsh environments. Whether used in a **restored WWII-era radio setup, a modern QRP (low-power) station, or as part of a custom antenna array**, these elements deliver the authenticity and performance expected from J. Smith s legacy of precision engineering. The set s **universal compatibility** with a variety of radios from vintage **BC-610s and BC-1000s** to modern **QRP transceivers** makes it an invaluable addition to any collector s or experimenter s toolkit, bridging the gap between historical radio technology and contemporary communication needs.

### **Pros and Cons of Buying Autodyne/J. Smith AB-21 Antenna Elements (GR-10, AB-2X, etc.)**

#### **Overview**

The Autodyne/J. Smith AB-21 series (including the AB-2X, AB-15, and Jeep variants) are popular **random-wire antennas** designed for **shortwave (HF) radio communication**. They are favored by amateur radio operators (hams) for their simplicity, portability, and effectiveness in challenging propagation conditions. Below is a detailed breakdown of their advantages and disadvantages.

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### **Pros**

1. **Portability and Mobility**

- The AB-21 and its variants are **lightweight and easy to transport**, making them ideal for **field day, portable operations, and emergency communications**.

- The **AB-2X** and **Jeep AB-15** are designed for **vehicle mounting**, allowing mobile operation without the need for a fixed tower.

- The **GR-10 elements** (if included) provide **better performance on higher bands (10m, 15m)** compared to standard AB-21 elements.

2. **Simplicity and Ease of Setup**

- No complex tuning required just **hang the wire, connect to the tuner, and operate**.

- **No need for a mast or tower**; can be strung between trees, poles, or a vehicle.

- **Minimalist design** reduces maintenance compared to dipole or vertical antennas.

3. **Broad Frequency Coverage**

- The **AB-21 (with GR-10 elements)** covers **160m 10m** (with proper tuning), making it versatile for **DX (long-distance) contacts**.

- The **AB-2X** (with its **2x elements**) improves performance on **higher bands (10m, 15m)** compared to a single AB-21.

- The **AB-15 (Jeep version)** is optimized for **mobile use**, maintaining decent performance while moving.

4. **Cost-Effective**

- **Cheaper than fixed antennas** (e.g., end-fed random wires, dipoles, or verticals).

- **No need for expensive tuning units** (though a **random-wire tuner** is still required).

- **Reusable components** elements can be repurposed for other projects.

5. **Good for Weak-Signal and DX Work**

- **Random-wire antennas** perform well in **poor propagation conditions** (e.g., nighttime DX).

- The **AB-2X s dual-element design** provides **better gain on higher bands** than a single AB-21.

- **Vertical polarization** (when properly oriented) can help with **weak-signal contacts**.

6. **Durability and Weather Resistance**

- **GR-10 elements** are **sturdy and resistant to wind and weather** (unlike some flimsy random wires).

- **No moving parts** less likely to fail over time compared to antennas with rotators or baluns.

7. **Compatibility with Tuners**

- Works seamlessly with **popular random-wire tuners** (e.g., **MFJ-989C, MFJ-1284, or homebrew solutions**).

- **No need for a matching network** the tuner handles impedance matching.

8. **Good for Emergency and Survival Use**

- **No permanent installation required** can be deployed quickly in emergencies.

- **Lightweight enough to be carried in a backpack** (useful for **hams in remote areas**).

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### **Cons**

1. **Limited Bandwidth Without Tuner**

- **Must use a tuner** to cover all bands **no direct connection to the radio without one**.

- **Tuner limitations** may restrict performance on **very low bands (160m)** if the tuner lacks sufficient power handling.

2. **Performance Depends on Installation**

- **Not as efficient as a properly tuned dipole or vertical** **lower SWR (Standing Wave Ratio) is difficult to achieve**.

- **Must be hung properly** (e.g., **not too close to ground, metal objects, or power lines**) to avoid performance degradation.

- **Mobile installations (Jeep AB-15) may suffer from ground-plane issues**, reducing efficiency.

3. **Lower Gain Compared to Directional Antennas**

- **Omnidirectional pattern** means **no directional gain** (unlike Yagis or loops).

- **Weaker signals on low bands (160m, 80m)** compared to dedicated low-band antennas.

4. **GR-10 Elements Are Heavy and Bulky**

- **GR-10 is a thick, rigid wire** **harder to transport** than standard AB-21 elements.

- **Requires more space** when deployed (not ideal for **ultra-portable operations**).

- **More expensive than standard AB-21 elements** (if purchased separately).

5. **SWR Can Be High on Some Bands**

- **Even with a tuner, SWR may be elevated** on certain bands, leading to **reduced power efficiency**.

- **Not ideal for high-power operation** without a good tuner.

6. **Limited Bandwidth on Higher Frequencies**

- **AB-21 (without GR-10) struggles on 10m and 15m** **AB-2X improves this but is still not as efficient as a dedicated Yagi**.

- **AB-15 (Jeep version) may have poor performance on higher bands** due to vehicle interference.

7. **Requires Proper Grounding for Mobile Use**

- **Mobile installations (Jeep AB-15) need a good ground plane** **poor grounding leads to weak signals**.

- **Vehicle chassis can act as a counterpoise, but performance varies** based on mounting location.

8. **Not Ideal for Fixed Station Use**

- **Less efficient than a permanent antenna setup** (e.g., **dipole, vertical, or Yagi**).

- **No fixed gain or pattern stability** performance fluctuates with deployment.

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### **Comparison of Variants**

**Model** **Best For** **Key Features** **Limitations**

----------- ------------- ------------------ ----------------

**AB-21 (Standard)** Portable, field day, emergency use Lightweight, covers 160m 10m (with tuner), easy to deploy Poor performance on 10m/15m without GR-10

**AB-2X (Dual Element)** Better 10m/15m performance Two elements improve gain on higher bands Still requires GR-10 for full performance

**GR-10 Elements** Higher band efficiency Thicker wire for better 10m/15m performance Heavy, bulky, more expensive

**AB-15 (Jeep Version)** Mobile operation Designed for vehicle mounting Ground-plane issues, limited band coverage

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### **Conclusion**

- **Hams who need a portable, lightweight antenna** for **field day, emergency use, or mobile operations**.

- **Operators who prioritize simplicity and ease of deployment** over maximum performance.

- **Those working on higher bands (10m 20m) where the AB-2X and GR-10 elements provide noticeable improvements**.

- **Budget-conscious buyers** who don t want to invest in a permanent antenna setup.

- **Fixed station users** who want **high efficiency and low SWR** (a dipole or Yagi would be better).

- **High-power operations** without a **high-quality tuner** (risk of damage to radio).

- **Serious DXers on low bands (160m 40m)** who need **maximum performance** (a **random-wire with a good tuner and proper installation is better**).

- **Those who want directional gain** (a **Yagi or loop antenna** would be superior).

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### **Recommendation**

You **need a portable, reliable antenna** for **field operations, emergencies, or mobile use**.

You **already have a good random-wire tuner** (e.g., MFJ-989C or similar).

You **plan to operate on 10m 20m frequently** (GR-10 and AB-2X help here).

You **don t want a permanent installation** and prefer **easy setup/teardown**.

You **need maximum performance on all bands** (consider a **dipole, vertical, or Yagi**).

You **plan to operate high power (100W )** without a **high-quality tuner**.

You **want directional gain** (a **Yagi or loop** is better for DX).

You **prefer a more efficient low-band antenna** (e.g., **random-wire with proper tuning**).

#### **

Details:

No combined shipping discount is available on FREE Shipping items. Antenna Base Mount AB-15, No section included. There are 8 AB-22/GR, 1 AB-23/GR AB-24/GR antenna sections, The AB-24 is the top pieces of set and does have some surface rust on it, Total length these 10 around 16 feet. NOTE: Buyer pays return shipping.

Nice condition, threads in excellent shape.

specifications hamamateuradio:

• brand: Autodyne/j Smith
• mpn: Ab-21/gr
• type: Ab-21 Series Antenna Sections
• compatible brand: Universal
• band: Hf
• to fit: Ham Radio Receiver, Ham Radio Transceiver, Ham Radio Transmitter
• unit quantity: 10
• connectivity: Threaded Sections
• mount type: Threaded Base
• country of origin: United States

general hamamateuradio:

• Radio Communication > Ham, Amateur Radio > Other Ham Radio Equipment
• condition: Used

seller hamamateuradio:

• rating: 100.0%
• city: Anamosa, Iowa
• # reviews: 6107

payments hamamateuradio:

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

offer hamamateuradio:

• sold: 0
• quantity: 1
• availability: In Stock
• started: February 15, 2026
• options: Ship-to-home

returns hamamateuradio:

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

shipping hamamateuradio:

• type: Calculated
• service: UPS Ground, USPS Ground Advantage, USPS Priority Mail
• carrier: UPS, USPS
• class: Standard, Expedited
• transit: 4-8 Days
• cost: $23.40