MAS-T-A · Masts & Infrastructure
A portable mast, tripod, guying, or infrastructure product that supports a documented antenna load.
Why operators make room for it
Turn open ground into a deliberate antenna site
Height, stability, wind area, and setup time all become part of antenna performance when the support travels with the station.
The CHA MAS-T-A is a versatile and durable universal mast adapter designed to enhance the functionality of antenna masts. Crafted from anodized aluminum, this adapter ensures longevity and resistance to environmental factors. Its universal design allows for seamless installation atop any mast or conduit with a 1-inch diameter, catering to both permanent and temporary setups.
The right infrastructure lets the operator choose the site for radio reasons, then raise a documented load with the required base, sleeve, guying, and power-line clearance.
Quick product reference
Key Specifications
- Product type
- Masts & Infrastructure
- Primary role
- A portable mast, tripod, guying, or infrastructure product that supports a documented antenna load.
- Color
- silver; black
- Material
- Anodized Aluminum
- RF role
- Mechanical support; supported antenna determines frequency and power
- Safety
- Keep the support and antenna away from power lines
- Structural role
- Portable support; the attached antenna determines the electrical specifications
- Load planning
- Verify antenna mass, wind area, leverage, extension height, surface, and weather
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
Height, stability, wind area, and setup time all become part of antenna performance when the support travels with the station.
- What else you need
Select the approved base, sleeve, tripod, stake, or mount for the support and terrain.
- Limitations
- Keep the support and antenna away from power lines
- Do not remove Retainer Ring.
- Do not remove Swivel Ring.
What an operator can do
- Raise documented wire antennas or approved elevated systems within the support's load, height, wind, and guying limits.
- Select the approved base, sleeve, tripod, stake, or mount for the support and terrain.
- Keep conductive supports and every attached antenna safely away from power lines.
Complete product details
CHA MAS-T-A (MAST TOP ADAPTOR)
The CHA MAS-T-A is a versatile and durable universal mast adapter designed to enhance the functionality of antenna masts. Crafted from anodized aluminum, this adapter ensures longevity and resistance to environmental factors. Its universal design allows for seamless installation atop any mast or conduit with a 1-inch diameter, catering to both permanent and temporary setups.
Key Features:
- 3/8-24 Threaded Center: Facilitates the attachment of various antennas and accessories, providing flexibility for different operational needs.
- 1/4-Inch Guide Line Holes: Equipped with four guide line holes around the perimeter, enabling secure guying of the mast to enhance stability.
Specifications:
- Material: Anodized Aluminum
- Thread Center: 3/8-24
- Guide Line Hole Diameter: 1/4 inch
- Base Inner Diameter (ID): 1 inch
- Base Outer Diameter (OD): 1-3/8 inches
- Top Outer Diameter (OD): 2-1/2 inches
- Overall Length: 1-3/16 inches
The CHA MAS-T-A adapter is particularly compatible with Max-Gain Systems' Fiberglass Push-Up Mast Kits, which feature heavy-duty construction with a 1/8-inch wall thickness. These masts are available in various lengths, including a 50-foot model (MK-8-HD) and a 25-foot model (MK-4-HD), both designed for portability and ease of assembly. The masts' top sections have an outer diameter of 1 inch, ensuring a perfect fit with the CHA MAS-T-A adapter.
By combining the CHA MAS-T-A adapter with Max-Gain Systems' Fiberglass Push-Up Mast Kits, users can achieve a robust and adaptable antenna support system suitable for both temporary and permanent installations. This combination is ideal for amateur radio operators, emergency responders, and outdoor communication enthusiasts seeking reliable and flexible solutions.
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