Astron
Astron ZAS-RS-70M-AP Linear Power Supply
Best high-capacity power supply for professional radio and communication equipment.
The Astron ZAS-RS-70M-AP is a robust linear power supply engineered for demanding applications, providing stable and reliable power. It's built with high-quality, heavy-duty components, including a rugged steel chassis, ensuring durability even in harsh conditions. This unit is ideal for communication devices, amplifiers, and transceivers, offering a high current capacity for intensive use. Its integrated fan cooling system ensures quiet operation and maintains efficiency, making it a dependable choice for noise-sensitive environments and long-lasting performance.
$621.95
Owner Satisfaction
4.8
/ 5
Category Rank
2
/ 3505
#2 in Power Adapters & Chargers
Price vs Category Average
+113%
Above average
Continuous Duty
57
/ Amps
Who it's for
- Professionals requiring reliable gear for continuous, heavy-duty use
- Technicians demanding stable voltage for sensitive, high-draw equipment
- Radio operators and audiophiles needing interference-free power
Who should skip it
- Shoppers looking for the most affordable high-amperage power options
- Users with limited workspace or those needing portable power solutions
- Budget-conscious buyers concerned about electricity consumption and heat
Performance breakdown
Current Capacity
Handles high-draw communication gear and amplifiers with significant power headroom.
Build Durability
Rugged steel chassis construction ensures longevity in demanding, high-impact environments.
Thermal Management
Integrated fan cooling maintains efficiency during extended periods of heavy operation.
Output Stability
Linear design delivers the clean, consistent voltage required for sensitive electronics.
Operational Noise
Engineered for quiet performance despite the high-output cooling requirements.
Connection Reliability
Standard screw-type terminals provide a secure, low-resistance connection for heavy cables.
Key Specs
Continuous Duty
57 Amps
Intermittent Current Supply (ICS)
70 Amps
Dimensions
6 x 13¾ x 11"
Power Terminals
1/4"-20 Screw Type
Fuse Rating
MDA 12A Ceramic
AC Current Draw Idle
340mA
AC Current Draw Full Load
11.4A
Shipping Weight
48 lbs
Features
- High current capacity for demanding loads
- Stable and reliable power output
- Quiet operation via integrated fan cooling
- Designed for durability in harsh conditions
- Rugged steel chassis construction
- 57 Amps continuous duty
- 70 Amp intermittent current supply
What customers say
Customers overwhelmingly praise the Astron ZAS-RS-70M-AP for its exceptional noise performance and rock solid reliability, making it a benchmark for sensitive radio equipment. The linear design delivers an extremely low noise floor, effectively eliminating the RF hash common in other supplies. Users value the massive 70-amp capacity, which easily handles high power amplifiers. While the unit is heavy and costly compared to switching alternatives, its legendary longevity and superior noise suppression justify the investment. This power supply is highly recommended for professionals and serious amateurs needing the best possible DC power quality and enduring performance.
Know before you buy
The 57 Amp rating represents the continuous duty cycle, meaning the unit can safely supply this power indefinitely. The 70 Amp rating is for intermittent use, allowing for short bursts of higher power demand common in radio transmissions.
Yes. While it features an integrated fan for cooling, it is designed for quiet operation, making it suitable for noise-sensitive environments like communication stations or home studios.
The unit utilizes 1/4"-20 screw-type terminals. This provides a secure, reliable connection for your equipment cables.
The chassis measures 6 inches high, 13.75 inches wide, and 11 inches deep. Given its 48-pound weight and the need for proper airflow, ensure you place it on a sturdy, level surface with adequate clearance around the fan.
First, check the integrated fuse. The unit uses an MDA 12A ceramic fuse, which can be replaced if it blows due to an electrical surge or overload.
No, this is a non-modular linear power supply. It is designed as a fixed, robust unit intended for high-current, heavy-duty applications rather than customizable cable management.
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