Description
Powertech MP3098 - 13.8V 20A DC Linear Power Supply
Product Overview
The Powertech MP3098 is a professional-grade 13.8V DC linear power supply delivering 20 amperes continuous output with 22 ampere maximum headroom capacity for powering amateur radio transceivers, UHF CB base stations, and communications equipment. This transformer-based power supply features linear regulation circuitry providing clean, low-noise DC power output ideal for sensitive radio equipment requiring stable voltage without switching noise interference. The 300-watt capacity with 4mm banana binding post outputs makes this unit suitable for both bench testing applications and permanent base station installations.
The MP3098 linear power supply is essential for amateur radio operators, electronics technicians, and communications professionals requiring reliable 13.8V DC power for HF transceivers, VHF/UHF radios, and test equipment. The transformer-based linear design eliminates switching noise common in switchmode power supplies, ensuring interference-free operation critical for radio reception and transmission. The robust construction with internal cooling fan, short circuit protection, and fused input provides dependable performance for continuous duty applications in workshop, laboratory, and home station environments.
Features & Benefits
13.8V DC Regulated Output Precision-regulated 13.8V DC output voltage matches standard operating voltage for amateur radio transceivers, CB base stations, and communications equipment, providing optimal performance without voltage adjustment requirements and protecting sensitive radio circuits from overvoltage conditions.
20A Continuous with 22A Maximum Headroom Delivers 20 amperes continuous output current with 22 ampere maximum headroom capacity, accommodating transmit power peaks from HF and VHF/UHF transceivers including high-power SSB and FM transmission modes without voltage sag or current limiting during peak demand periods.
Linear Transformer-Based Design Traditional transformer-based linear regulation eliminates switching frequency noise and electromagnetic interference associated with switchmode power supplies, providing clean DC output essential for sensitive radio receivers and ensuring interference-free operation across HF, VHF, and UHF frequency ranges.
4mm Banana Binding Post Outputs Professional-grade 4mm banana binding post terminals provide secure high-current connections with excellent electrical contact, accommodating standard test leads, power cables, and permanent wiring installations with reliable low-resistance connections for sustained high-current operation.
Short Circuit Protection Integrated output short circuit protection safeguards the power supply from damage during wiring errors, equipment faults, or accidental short circuits, automatically limiting output current and protecting internal components from overload conditions without requiring fuse replacement.
Internal Cooling Fan Built-in cooling fan provides active thermal management during high-current operation and elevated ambient temperatures, ensuring reliable continuous duty performance by maintaining safe operating temperatures for transformer, regulation circuitry, and output components throughout extended operating sessions.
Technical Specifications
| Specification |
Details |
| Model |
Powertech MP3098 (SMP3098) |
| Output Voltage |
13.8V DC |
| Continuous Current |
20 Amperes |
| Maximum Current |
22 Amperes (Headroom) |
| Power Rating |
300 Watts |
| Power Supply Type |
Linear (Transformer with Regulation Circuit) |
| Output Connection |
4mm Banana Binding Posts |
| Power Indicator |
LED |
| Cooling |
Internal Fan |
| Input Protection |
Fused |
| Output Protection |
Short Circuit Protection |
| Applications |
Bench Testing, Lab Use, Base Station Power |
| Suitable Equipment |
Amateur Radio, CB Base Stations, Communications |
Installation & Compatibility
The Powertech MP3098 operates from standard 240V AC mains power and requires adequate ventilation for proper cooling fan operation during extended use. Install the power supply on a stable bench surface or rack mount location with clearance around ventilation openings to ensure unrestricted airflow for thermal management. Connect equipment to the 4mm banana binding posts observing correct polarity, with the positive terminal connected to the equipment positive input and negative terminal to equipment ground/negative.
The MP3098 is compatible with amateur radio transceivers, UHF CB base stations, VHF/UHF mobile radios, and communications equipment operating from 13.8V DC power sources. Typical applications include HF transceivers drawing 15-20 amperes during SSB transmission, VHF/UHF mobile radios requiring 10-15 amperes for FM operation, and multiple low-power devices operating simultaneously from the 20-ampere capacity.
When connecting equipment, verify total current requirements including transmit peaks do not exceed the 20-ampere continuous rating. The 22-ampere maximum headroom provides brief overload capacity for transmission peaks, but sustained operation above 20 amperes may cause thermal protection activation or reduced lifespan. Use appropriately rated power cables with secure connections to banana binding posts to minimize voltage drop and ensure reliable high-current delivery.
Frequently Asked Questions
Q: Can the MP3098 power a 100-watt HF transceiver?
A: Yes, the MP3098 is well-suited for 100-watt HF transceivers. A typical 100-watt HF radio draws approximately 5-8 amperes on receive and 20-22 amperes during peak SSB transmission. The MP3098's 20-ampere continuous rating with 22-ampere maximum headroom accommodates these power requirements, though operation at maximum output may engage thermal protection during extended transmission periods.
Q: What is the difference between linear and switchmode power supplies?
A: Linear power supplies like the MP3098 use transformer-based regulation, providing clean DC output without switching noise but with lower efficiency and heavier weight. Switchmode power supplies are lighter and more efficient but generate high-frequency switching noise that can interfere with sensitive radio reception. For amateur radio and communications applications, linear supplies offer superior performance due to noise-free operation.
Q: Does the internal cooling fan run continuously?
A: Fan operation depends on thermal load and internal temperature. During light loads (under 10 amperes), the fan may cycle on and off or run at reduced speed. During heavy loads approaching 20 amperes or elevated ambient temperatures, the fan runs continuously to maintain safe operating temperatures and prevent thermal overload.
Q: Can I use the MP3098 for mobile radio installations?
A: The MP3098 is designed as a bench and lab power supply operating from 240V AC mains, not for mobile vehicle installations. For mobile radio installations requiring 13.8V power from vehicle electrical systems, use dedicated mobile power supplies or DC-DC converters designed for automotive environments.
Q: What happens if I short circuit the output?
A: The MP3098 features short circuit protection that automatically limits output current during short circuit conditions, protecting the power supply from damage. When the short circuit is removed, normal operation resumes without requiring fuse replacement or manual reset. However, avoid prolonged short circuit conditions as they generate excessive heat in protection circuitry.
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