Intellitron AA-3913 4:1 Current Balun
Best impedance matching solution for amateur radio antenna enthusiasts.
Optimize your radio setup with the Intellitron AA-3913 4:1 Current Balun. This robust accessory efficiently transforms a 200-ohm balanced antenna load to a 50-ohm coaxial impedance, perfect for folded dipoles and collinear arrays. It effectively suppresses common-mode RF current, preventing interference with your sensitive equipment. Built with a durable heavy PVC enclosure and stainless hardware, it's designed for longevity. Supporting the full 160-meter through 10-meter bands and handling up to 300 Watts, it's a reliable addition to your amateur radio station.
$49.95
Owner Satisfaction
4.7
/ 5
Category Rank
23
/ 1072
#23 in Communication Radio Accessories
Price vs Category Average
-50%
Below average
Power Rating
300
/ Watts PEP/CW
Who it's for
- High-power enthusiasts needing reliable, heat-resistant equipment
- Operators struggling with high noise floors and interference
- Hams using folded dipoles or high-impedance wire antennas
- Radio hobbyists seeking a cleaner, quieter signal environment
- Antenna builders matching OCFD designs to standard coax
- Contesters running high-duty cycle transmissions for long periods
Who should skip it
- Outdoor installers lacking experience with weatherproofing feed points
- Users with standard half-wave dipoles needing 1:1 matching
- Efficiency purists concerned about minimal signal loss
- Operators working at the extreme edges of HF bands
- Experimenters requiring versatile, multi-ratio impedance matching
- DXers prioritizing maximum power delivery at high frequencies
Performance breakdown
Impedance Matching
Precise 4:1 transformation ensures optimal power transfer for balanced antenna loads.
RF Suppression
Guanella design effectively eliminates common-mode noise for a cleaner signal.
Weather Resistance
Heavy PVC housing and stainless hardware withstand harsh outdoor environmental conditions.
Power Handling
Reliably manages 300 watts, covering most standard amateur radio station requirements.
Frequency Versatility
Broad 160-meter to 10-meter range supports diverse multi-band antenna configurations.
Installation Ease
Integrated copper pigtails simplify the connection process for quick antenna deployment.
Key Specs
Power Rating
300 Watts PEP/CW
Transform Ratio
4:1
Impedance
200 ohms balanced to 50 ohms source
Frequency Range
1.8 MHz to 50 MHz (160-10M)
Configuration
Two-core Guanella design
Enclosure Material
Heavy PVC
Pigtail Gauge
14-gauge copper
Material
Plastic
Features
- Transforms 200-ohm load to 50-ohm source
- Effectively suppresses common-mode RF current
- Durable heavy PVC enclosure
- Utilizes superior two-core Guanella design
- Supports 160-meter through 10-meter bands
- Includes 14-gauge copper pigtails
- Ideal for folded dipoles and collinear arrays
What customers say
The Intellitron AA-3913 balun earns high praise for its exceptional reliability and robust quality. Users consistently report superior performance in suppressing common mode currents, resulting in reduced RFI and a cleaner noise floor vital for weak signal work. The build quality is a major highlight; the unit features a durable, weatherproof housing and high-quality connectors, suggesting excellent longevity. It handles high power levels effectively without significant loss or saturation, confirming its conservative rating. The primary satisfaction driver is the consistent, near-perfect 4:1 transformation ratio across the HF spectrum, simplifying antenna tuning. While priced above budget options, operators feel the AA-3913 offers superior value due to its dependable performance and long term reliability.
Know before you buy
This balun is specifically engineered for antennas requiring a 4:1 impedance transformation, such as folded dipoles and collinear arrays.
The AA-3913 is rated for up to 300 Watts PEP/CW. It is suitable for most standard amateur radio setups but should not be used with high-power amplifiers exceeding this limit.
The two-core Guanella design is highly effective at suppressing common-mode RF current. This helps prevent RF feedback into your shack and reduces interference with your sensitive radio equipment.
Yes, it is built with a heavy-duty PVC enclosure and stainless steel hardware, making it durable enough to withstand long-term outdoor exposure.
Yes, it includes 14-gauge copper pigtails, which simplifies the connection process to your antenna elements.
It supports the full HF spectrum from 1.8 MHz to 50 MHz, covering all amateur bands from 160 meters through 10 meters.
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