Astron
RS-35A Linear Power Supply
Best linear power supply for amateur radio enthusiasts needing stable performance.
The Astron RS-35A is a robust, high-quality linear DC power supply engineered for demanding applications like Ham Radio. It features solid-state electronic regulation for stable power delivery and includes essential protection mechanisms such as fold-back current limiting and crowbar over-voltage protection. With a continuous output of 25A and a peak capacity of 35A at 13.8 Vdc, this unit ensures reliable performance. Its adjustable voltage range and low ripple output make it a dependable choice for your communication and electronic equipment needs.
$294.95
Owner Satisfaction
4.7
/ 5
Category Rank
6
/ 285
#6 in Power
Price vs Category Average
-1%
Below average
Continuous Output
2513.8
/ A at Vdc
Who it's for
- Amateur radio operators needing interference-free signal clarity
- Professionals requiring long-term reliability for continuous heavy-duty use
- Technicians demanding stable voltage during sudden power spikes
Who should skip it
- Users with limited desk space or needing portable equipment
- Environmentally conscious buyers prioritizing low energy consumption
- Engineers requiring adjustable voltage for diverse testing applications
Performance breakdown
Voltage Stability
Solid-state regulation ensures consistent power delivery under varying load conditions.
Signal Cleanliness
Minimal ripple output prevents unwanted noise in sensitive communication equipment.
Build Durability
Heavy-duty construction provides a rugged foundation for long-term station reliability.
Safety Integration
Fold-back limiting and crowbar protection offer essential peace of mind.
Current Capacity
Ample headroom for high-demand radio transmissions and peak power bursts.
Portability
Substantial weight makes this a permanent fixture rather than a mobile solution.
Key Specs
Continuous Output
25A at 13.8 Vdc
Peak Output
35A at 13.8 Vdc
Voltage Adjustment Range
11.0-15.0 Vdc
Ripple
less than 5 mv peak to peak
Input Voltage
105-125 VAC
Weight
27 lbs (12.247 kg)
Protection
8A Fuse Protection
Regulation Type
Solid-state electronically regulated
Features
- Stable power with solid-state regulation
- Protects against over-current and over-voltage
- Heavy-duty design for reliability
- Adjustable output voltage
- Low ripple for clean power
- Ideal for Ham and CB Radio
- Fuse protection for safety
- Durable construction
What customers say
The Astron RS-35A Linear Power Supply earns high praise primarily for its exceptional reliability and superior power quality. Users consistently describe the build as extremely robust, suggesting long term dependability. The core satisfaction stems from its linear design, which provides the extremely low ripple and noise essential for sensitive radio equipment. This noise free operation is considered the industry benchmark. While the unit is heavy, this is accepted as a necessary component for its superior performance. Customers view the RS-35A as a worthwhile, premium investment due to its consistent and dependable power delivery in demanding applications.
Know before you buy
Linear power supplies like the RS-35A are known for their exceptionally low electrical noise and ripple. This makes them ideal for sensitive radio equipment where you need clean, interference-free power for clear communication.
Yes, the RS-35A features an adjustable voltage range between 11.0 and 15.0 Vdc. This allows you to fine-tune the output to match the specific requirements of your connected equipment.
It does. The unit includes fold-back current limiting to prevent over-current damage and crowbar over-voltage protection to safeguard your equipment from voltage spikes. It is also protected by an 8A fuse.
The 25A continuous rating represents the maximum current the unit can supply indefinitely during normal operation. The 35A peak rating is the maximum current it can handle for short durations, such as during the initial transmit burst of a radio.
Absolutely. The RS-35A is built with a heavy-duty design and solid-state regulation, making it a standard choice for Ham and CB radio operators who require a reliable, long-lasting power source for their base stations.
The RS-35A weighs 27 pounds. Because of its robust transformer-based construction, you should ensure your desk or equipment rack is sturdy enough to support the weight.
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