Collapsible Electrical Radiator Extension
An 8 ft 9.5 in collapsible radiator section that installs below the CHA MIL 2.0 to create an approximately 18 ft 2 in documented MPAS vertical radiator.
More radiator when lower bands matter
Unfold a taller MPAS vertical from a packable field component
The CHA MIL EXT 2.0 nearly doubles the deployed length of the CHA MIL 2.0 while retaining the collapsible, field-ready format that portable operators expect. That added electrical length gives a documented MPAS vertical more useful lower-frequency capability without committing to a permanent mast.
It installs below the MIL 2.0 as an active part of the radiator, not as a general-purpose support. Combined with the correct HYBRID matching unit, mount, counterpoise, coax, and tuner, it creates an approximately 18-foot vertical for camping, POTA, emergency communications, and rapidly relocatable stations.
Quick product reference
Key Specifications
- Product type
- Collapsible electrical radiator extension
- Extended length
- 105.5 in / 8 ft 9.5 in (2.68 m)
- Collapsed length
- Approximately 28.1 in (71.4 cm)
- Combined with MIL 2.0
- Approximately 18 ft 2 in (5.54 m) radiator
- Sections
- 4 aluminum sections
- Diameter
- Approximately 0.75 in (1.9 cm)
- Weight
- Approximately 1 lb (0.45 kg)
- Interface
- 3/8-24
- Documented frequency use
- 12-54 MHz with MIL and tuner; 1.8-54 MHz with MIL, HYBRID MICRO/MINI, and tuner
- System role
- Electrically active radiator—not a general-purpose mast
Operator decision support
Plan the complete setup
See what this product is best suited for, what the documented setup needs, and the boundaries to confirm before deployment.
- Best for
Modular field systems become valuable when one carefully chosen section can change what the complete antenna is able to do.
- What’s included
MIL 2.0 Whip Extension
- What else you need
Combine it with the specified base, loading, feedpoint, mount, support, and radial or counterpoise system.
- Compatible with
3/8-24
What an operator can do
- Increase the electrical and physical length of the CHA MIL 2.0 for improved lower-frequency performance.
- Build the documented MPAS 2.0 portable vertical using a HYBRID MICRO or MINI, MIL EXT 2.0, MIL 2.0, mount, counterpoise, and external tuner.
- Collapse four field sections into a compact transport length for man-pack and go-kit use.
Correct position in the system
- Approved mount and counterpoise system.
- CHA HYBRID MICRO or MINI matching transformer/base.
- CHA MIL EXT 2.0.
- CHA MIL 2.0 whip above the extension.
- Coax and a suitable wide-range external antenna tuner.
Deployment and maintenance
- Use a suitable external tuner as required by the documented broadband configuration.
- For short wet deployments, seal each joint with quality electrical tape and remove it after use.
- For longer installations, apply a suitable aluminum anti-oxidant compound to clean joints and weather-seal them.
- Do not exceed the structural limits of the selected mount, mast support, guying system, or connected radiator.
Package contents
- 1 x CHA MIL EXT 2.0 collapsible extension
CHA MIL 2.0, HYBRID base, mount, counterpoise/radials, coax, and tuner are sold separately unless included in a complete system.
