Hy-Gain AV-620 – A Multiband HF Vertical Antenna Without Compromise

Introduction

In the world of amateur radio, choosing the right antenna is essential for achieving solid performance—especially for DX communications. One antenna that has gained attention over the years is the Hy-Gain AV-620, a multiband vertical designed for simplicity, efficiency, and easy installation, without the need for a complex radial system.

The History of Hy-Gain

Hy-Gain is one of the most recognized brands in the antenna world, with roots dating back to the 1950s in the United States. The company quickly became popular among amateur radio operators thanks to its durable and affordable antenna designs.

Over the years:

• it produced some of the most popular HF antennas (both verticals and Yagis)
• it was later acquired by MFJ Enterprises
• it remained a respected name in the ham radio community

Hy-Gain antennas are known for their classic yet effective designs, many of which are still in use today.

The History of the Hy-Gain AV-620

The AV-620 Patriot was designed as a modern solution for radio amateurs who:

• do not have space for radial systems
• want a compact vertical antenna
• need quick access to multiple HF bands

The antenna was engineered for:

• high efficiency
• low radiation angle (ideal for DX)
• trapless operation (reduced losses)

Today, the AV-620 is no longer widely produced and is considered by many operators a “semi-legendary” antenna for compact HF installations.

Technical Specifications

• Frequency bands: 6, 10, 12, 15, 17, 20 meters
• Type: multiband vertical, trapless design
• Feed system: end-fed with broadband matching unit
• Typical VSWR: ~1.5:1
• Maximum power: 1500W
• Height: ~7 meters
• Radiation pattern: omnidirectional (360°)
• Radiation angle: low (~17°, excellent for DX)
• No radials required (internal counterpoise system)

Real-World Performance

The Hy-Gain AV-620 is optimized for:

• HF DX communications
• quick and simple deployment
• limited-space installations

Advantages:

• trapless design → lower losses
• good bandwidth across bands
• easy installation
• no need for radial systems

Limitations:

• less efficient than a full radial ground system
• performance depends on surroundings
• requires fine tuning for best results

Installation Tips

For best performance:

✔ Install as high as possible

• ideally above roof level
• avoid nearby obstacles

✔ Keep distance from metal structures

• gutters
• metal fences
• other antennas

✔ Use proper grounding

• for lightning protection
• for RF stability

✔ Tune carefully

• use an antenna analyzer (NanoVNA or similar)
• optimize each band

✔ Use high-quality coax

• feedline losses matter significantly on HF

My Experience with the Hy-Gain AV-620 (YO2BTW)

In my case, I decided to test this antenna in real-world conditions, even though I have enough space for more complex radial-based systems.

I wanted to see exactly what the Hy-Gain AV-620 can deliver when installed properly.

My Setup

The antenna is installed using:

• a pulley system, allowing easy raising and lowering for maintenance
• a solid concrete foundation, ensuring long-term stability
• the coaxial cable is routed underground, for both protection and a clean installation
• high-quality professional coax:
  👉 Messi & Paoloni ULTRAFLEX 10

This setup minimizes losses and ensures excellent long-term reliability.

Performance Results

The results exceeded my expectations:

• Very good SWR across all bands
• stable and predictable behavior
• I achieved many DX contacts, even under less favorable conditions
• excellent performance for a no-radial antenna

The antenna is installed at approximately 3 meters above ground, yet performance remains impressive—confirming the efficiency of its design.

Personal Conclusion

I can honestly say I am very satisfied with this antenna.

The Hy-Gain AV-620 proves that:

• you don’t always need complex systems for solid DX performance
• proper installation makes a huge difference
• quality components are essential

👉 Photos showing:

• the mounting system
• the concrete base
• the final antenna setup

Who Is This Antenna For?

✔ operators with limited space
✔ locations where radials are not possible
✔ DX enthusiasts
✔ simple and efficient setups

❌ less suitable for:

• high-end contesting setups
• maximum-performance radial field systems

Final Thoughts

The Hy-Gain AV-620 remains a very interesting antenna even today. It is an excellent choice for operators looking for a balance between performance, simplicity, and footprint.

With proper installation, it can deliver impressive results—exactly as confirmed by real-world use.

73 de Hadrian – YO2BTW