Best 13.8 Volt Power Supply Solutions for Ham Radio and Bench Testing in 13.8V Output
Looking for a reliable 13.8V power supply to run CB and ham radios or DIY bench projects? This guide highlights five solid options that deliver stable 13.8V DC, with features tailored to hobbyists and professionals alike. Each choice targets a specific use case, from compact benchtop models for small setups to rugged units for continuous operation. Read on to find the best fit for your equipment, whether you need screw-terminal convenience, USB charging, or integrated noise control.
| Product | Brand | Output | Best For |
|---|---|---|---|
| Universal Compact Bench Power Supply SPS-1330 | Jesverty Store | 13.8V, 30A | Small labs, CB/ HAM radios, screw-terminal versatility |
| 13.8V AC/DC Adapter Replacement (Uniden) 13.8V | Generic | 13.8V DC (replacement) | Replacement for existing setups, compact convenience |
| 13.8V Power Supply with Cigarette Plug | Naweisz Store | 13.8V DC, up to 30A, USB Type-A | Multi-device charging and DC power for radios |
| 13.8V 30A Bench Power Supply with Cigarette Plug | Unspecified | 13.8V DC, up to 30A (continuous 20A) | Reliable bench power with noise offset control |
| Universal Compact Bench Power Supply SPS-30II | Jesverty Store | 9–15V adjustable or fixed 13.8V | Flexible voltage range, front-panel convenience |
Note: Each product listed here provides a stable 13.8V DC output, with variations in form factor, terminal types, and additional features like USB charging or noise management. Use the table above to compare core specs at a glance before diving into detailed sections for each model.
Universal Compact Bench Power Supply SPS-1330
The SPS-1330 is a compact, 30A regulated benchtop power supply designed for easy 13.8V power delivery. It is well suited for CB radios, HAM radios, and other 13.8V equipment requiring robust current capability. The unit features screw-type output terminals for secure, reliable connections and a built-in cooling fan to help maintain performance during longer operation. Best for small hobby benches, classroom setups, or field kits where space is at a premium.
- Best for compact lab benches and tabletop HAM setups
- Better for devices needing sturdy screw-terminal connections
- Choose this if you want a fixed 13.8V supply with solid heat management
Limitation: The unit’s focus is on compact form and fixed 13.8V output; advanced programmable features are not indicated in the listed data.
13.8V AC/DC Adapter Replacement for Uniden
This replacement adapter offers a practical option for Uniden devices and similar equipment, featuring safety protections, multiple smart safeguards, and universal input compatibility (100–240V). It suits users who need a standard 13.8V supply with broad compatibility and straightforward use. It’s positioned as a reliable spare or upgrade for radios and scanners that rely on a dedicated DC supply.
- Best for Uniden-compatible radios and similar gear
- Better for shoppers seeking CE/FCC-certificated safety features
- Avoid this if your device requires programmable control beyond standard fixed output
Limitation: This replacement is described as non-OEM, so users should verify model compatibility before purchasing.
13.8V Power Supply with Cigarette Plug and USB
This model combines a 13.8V DC output (up to 30A) with a USB Type-A charging port (5V/2A). It includes a cigarette lighter plug and screw-type terminals for versatile use with radios, scanners, and other DC-powered devices. The USB port enables simultaneous charging of a phone or tablet while the DC load is powered, making it convenient for fieldwork and portable setups.
- Best for power-and-charge versatility in one unit
- Better for multi-device setups without extra adapters
- Choose this if you want USB charging on the same supply that powers your radio
Limitation: USB charging speed is limited to 2A, which may be slower for high-demand devices.
13.8V 30A Bench Power Supply with Noise Offset
This bench power supply delivers 13.8V DC with a robust 30A maximum and 20A continuous output. It includes an adjustable noise offset control to reduce switching noise, a backlit meter for clear voltage and current readouts, and a simple single-button interface for switching. It is well-suited for amateur radios and other equipment sensitive to ripple or noise. Best for users who value cleaner DC output during transmissions.
- Best for minimizing switching noise in radio applications
- Better for setups where a clear display of voltage/current matters
- Avoid this if you need programmable voltage scaling beyond fixed 13.8V
Limitation: The data emphasizes noise control, but there is no mention of USB charging or auxiliary outputs in this model.
Universal Compact Bench Power Supply SPS-30II
The SPS-30II offers a flexible output: continuously adjustable from 9V to 15V or a fixed 13.8V setting. It features stern screw-type main terminals for reliable connections and a pair of auxiliary terminals plus a cigarette lighter socket on the front for added convenience. This model suits users who want a more adaptable supply for various experiments while still delivering a stable 13.8V when needed.
- Best for users needing adjustable voltage alongside fixed 13.8V
- Better for multi-purpose test benches and hobby labs
- Choose this if you regularly switch between 9V–15V for different devices
Limitation: The description focuses on versatility; users seeking only a fixed 13.8V output may prefer a dedicated 13.8V unit.
Buying Guide: Choosing the Right 13.8V Power Supply
What to consider before buying a 13.8V power supply for radios or bench work. Start with the output current you need. If your equipment draws up to 20A in continuous use, a supply rated higher, such as 30A, provides headroom and reduces heat. If you run multiple devices, consider models with extra terminals, USB charging, or cigarette lighter sockets for convenience.
Key factors to compare across models:
- Output stability: Look for units specified to deliver continuous current and stable voltage under load.
- Terminal type: Screw terminals offer secure, low-resistance connections; front-panel outlets add convenience.
- Noise and ripple control: For sensitive radios, a unit with noise offset or filtering can improve performance.
- Adjustability: Some models provide 9–15V range in addition to fixed 13.8V, which enhances versatility.
- Ports and multi-device charging: USB Type-A outputs and cigarette lighter sockets can simplify power management for portable kits.
Application-focused tips:
- For dedicated ham radio operation, prioritize models with high continuous current (20A+) and stable 13.8V output.
- For hobby test benches, screw-terminal availability and compact size help keep the workspace organized.
- For field work, consider units with multiple connection options (screw terminals, cigarette lighter, USB) to minimize adapters.
FAQ
- What is the typical output you should look for in a 13.8V power supply? Most users choose units capable of at least 20A continuous output, with higher ratings (like 30A) offering better headroom for peak loads.
- Why are screw-type terminals often preferred? They provide secure, reliable connections and are compatible with heavier gauge wires, reducing connection resistance.
- Is USB charging important in a 13.8V power supply? It can be convenient for charging personal devices while keeping the DC load powered, but it is not essential for radio operation.
- Should I buy a fixed 13.8V supply or an adjustable one? If you need only 13.8V, a fixed supply is simpler. If you test multiple devices or require different voltages, an adjustable model offers flexibility.
- What about noise levels in switching supplies? Some models include noise offset or filtering to minimize ripple, which benefits sensitive RF equipment.
- Are these units suitable for professionals? Yes, many of these supplies are designed for lab bench use and field operability, delivering consistent DC power for radios and other gear.