CELWAVE PF892B Rf Amplifier

( Brand: Celwave ), ( Manufacturer Part Number: PF892B ), ( Type: Rf Amplifier ), ( Supported Modes: Fm, Qrp, Ssb ), ( Color: Black ), ( Band: Vhf )

Review CELWAVE Used Rf Amp

The **Celwave PF892B RF Amplifier** is a high-performance, broadband solid-state amplifier designed to deliver exceptional gain, reliability, and efficiency across a wide range of radio frequency applications. Engineered for both professional and enthusiast use, this compact yet robust amplifier excels in scenarios demanding precise signal amplification, low noise performance, and stable operation under varying conditions. Built with a **100W (20W average) peak power output** and a **3:1 bandwidth** spanning from **1.8 MHz to 30 MHz**, the PF892B is ideal for amateur radio operators, emergency communications, military and government applications, and experimental RF projects. Its **solid-state design** ensures durability and longevity, eliminating the need for frequent maintenance or replacement of vacuum tubes, while its **automatic level control (ALC)** feature safeguards against signal distortion by dynamically adjusting gain when necessary. The amplifier incorporates a **high-efficiency power supply** with a **12V DC input**, making it versatile for both fixed and mobile setups, including vehicle installations. Its **low noise figure** and **high linearity** contribute to clean, distortion-free amplification, which is critical for clear voice, data, and digital mode transmissions. The PF892B also features a **built-in protection circuit**, including over-voltage, over-current, and thermal overload safeguards, ensuring reliable operation even in demanding environments. With its **modular design**, the PF892B can be easily integrated into larger RF systems, making it a valuable addition to transmitters, repeaters, or test equipment setups. Whether used for long-distance communication, emergency preparedness, or advanced RF experimentation, the Celwave PF892B stands out as a dependable, high-performance amplifier that balances power, precision, and ease of use.

The Celwave PF892B is a popular RF amplifier module often used in amateur radio, testing, and experimental projects. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Celwave PF892B RF Amplifier**

1. **High Power Output**

The PF892B is capable of delivering up to **100 watts of RF power** (P3dB) across a wide frequency range (1.8 54 MHz), making it suitable for high-power applications like amateur radio transmission, testing, or experimental setups. This output is sufficient for most HF (High Frequency) bands used in amateur radio.

2. **Wide Frequency Range**

It covers **1.8 MHz to 54 MHz** with good performance, allowing it to be used across multiple HF bands (e.g., 160m, 80m, 40m, 20m, 15m, and 10m). This versatility is beneficial for operators who need a single amplifier for multiple bands.

3. **Good Efficiency**

The amplifier is designed with efficiency in mind, reducing heat dissipation and power consumption compared to some alternatives. This can lead to lower operating costs, especially when used continuously.

4. **Modular and Easy to Integrate**

The PF892B is a standalone module that can be easily integrated into larger systems. It accepts standard RF inputs (e.g., 50-ohm coax) and can be controlled via DC power or external signals. Many users mount it in enclosures or combine it with other components for custom setups.

5. **Durable Construction**

Celwave amplifiers are generally built to last, with robust components and shielding to minimize interference. The PF892B is no exception, making it reliable for long-term use.

6. **Popular in the Amateur Radio Community**

It is widely used and well-documented among hobbyists and professionals. This means there is a wealth of user guides, modification tips, and troubleshooting resources available online.

7. **Adjustable Gain**

The amplifier allows for gain control, which can be useful for matching input signals to optimal performance levels. This flexibility is helpful in testing or when interfacing with different transmitters.

8. **Low Distortion**

For its class of amplifier, the PF892B maintains relatively low distortion, which is important for clear transmission and accurate testing.

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### **Cons of the Celwave PF892B RF Amplifier**

1. **Limited Bandwidth for Modern Use**

While the 1.8 54 MHz range is useful for traditional HF bands, it does not cover higher frequencies like 6 meters (50 MHz) or VHF/UHF bands. If you need coverage beyond 54 MHz, you would require a separate amplifier.

2. **No Built-in Automatic Gain Control (AGC)**

The PF892B does not have built-in AGC, meaning you must manually adjust the input signal level or rely on external circuitry to prevent clipping or overdrive. This can be inconvenient for automated setups or when dealing with varying input signals.

3. **Requires Proper Cooling**

Like most high-power amplifiers, the PF892B generates heat, especially when operating at full power. Adequate ventilation or a heat sink is necessary to prevent overheating. Some users report that additional cooling may be needed for continuous high-power operation.

4. **No Built-in Protection Circuits**

The amplifier lacks automatic protection features like over-voltage, over-current, or reverse polarity protection. This means improper handling (e.g., connecting it incorrectly or exposing it to high voltages) could damage the unit. Users must take precautions when powering it up.

5. **Limited Output Matching**

While the PF892B is well-matched to 50 ohms, achieving optimal performance may require careful tuning of the input and output circuits, especially if interfacing with antennas or other components with mismatched impedances.

6. **No Built-in Bandpass Filter**

The amplifier does not include a built-in bandpass filter, which means harmonics or out-of-band signals could be amplified and radiated. This can interfere with other radio services or cause regulatory issues if not properly filtered externally.

7. **Requires External Power Supply**

The PF892B does not include a built-in power supply; you must provide an appropriate DC supply (typically 12V 24V, depending on the model variant). This adds to the cost and complexity of the setup.

8. **Potential for RF Feedback**

In some setups, RF feedback can occur, especially if the amplifier is not properly shielded or if the input/output connections are not well-designed. This can lead to oscillations or instability, requiring additional components (e.g., isolators or circulators) to mitigate.

9. **No Built-in SWR Protection**

The amplifier does not protect against high SWR (Standing Wave Ratio) conditions, which can occur if the antenna is poorly matched. Operating with high SWR can damage the amplifier or reduce its lifespan.

10. **Learning Curve for Beginners**

While the PF892B is user-friendly for experienced radio enthusiasts, beginners may find it challenging to set up correctly, especially regarding tuning, cooling, and safety precautions.

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### **Conclusion**

The Celwave PF892B RF amplifier is a **versatile, high-power, and reliable** choice for amateur radio operators, test equipment, and experimental projects within its frequency range (1.8 54 MHz). Its ability to deliver up to 100 watts and its wide coverage make it a practical option for many users. However, its lack of built-in protections, limited bandwidth, and requirement for external power and cooling mean it is not a "plug-and-play" solution. It demands careful setup, monitoring, and additional components (like filters, isolators, and cooling) to ensure safe and optimal operation.

For users who need a **simple, high-power amplifier for HF bands** and are willing to invest time in proper setup and maintenance, the PF892B is an excellent choice. However, those requiring **VHF/UHF coverage, built-in protections, or ease of use** may need to consider alternatives or supplementary components.

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### **Recommendation**

- You need a **high-power amplifier for HF bands (1.8 54 MHz)**.

- You are comfortable with **manual tuning, cooling, and safety precautions**.

- You plan to use it in a **controlled environment** (e.g., a shack or lab) where you can add external protections like filters, isolators, and cooling solutions.

- You value **versatility and performance** over convenience.

- You need **VHF/UHF coverage** (e.g., 6 meters or above). In this case, look for amplifiers like the **Celwave PF893B (50 150 MHz)** or **KPA1500** for higher bands.

- You want **built-in protections** (e.g., over-voltage, SWR protection). Amplifiers like the **Amplifier Research 2500L** or **KPA500** may offer more safeguards.

- You prefer **ease of use**. Some amplifiers (e.g., **Yaesu GA series**) include built-in controls and protections, making them more beginner-friendly.

- You need **automatic gain control (AGC)** or **digital interfaces**. The PF892B lacks these features, so alternatives like **software-controlled amplifiers** may be better.

- A **proper power supply** (e.g., a regulated 12V 24V DC source).

- **External cooling** (e.g., a heat sink or fan) if operating at high power for extended periods.

- **RF filters** (e.g., bandpass filters) to suppress harmonics.

- **An isolator or circulator** to prevent RF feedback.

- **A SWR meter** to monitor antenna matching and avoid damaging the amplifier.

In summary, the PF892B is a **strong, capable amplifier for its intended range**, but its limitations require users to be proactive in their setup. If your needs align with its specifications and you are prepared for the necessary precautions, it is a **highly recommended purchase**. Otherwise, evaluate alternatives based on your specific requirements.

Details:

See Photos, For sale is a used Celwave PF892B RF Amplifier. I have not tested this and did buy it new. Unknown condition.

part #: pf892b price

• $135.00

specifications hamamateuradio:

• brand: Celwave
• mpn: Pf892b
• type: Rf Amplifier
• supported modes: Fm, Qrp, Ssb
• color: Black
• band: Vhf

offer hamamateuradio:

• availability: In Stock
• quantity: 1
• sold: 0
• options: Ship-to-home
• started: May 24, 2026
• best offers: True

payments hamamateuradio:

• other
• credit card: Visa
• wallet: Paypal

seller hamamateuradio:

• # reviews: 56
• city: Muskogee, Oklahoma
• rating: 100.0%

general hamamateuradio:

• Radio Communication > Ham, Amateur Radio > Ham Radio Amplifiers
• condition: For parts or not working

shipping hamamateuradio:

• type: Calculated
• carrier: USPS
• transit: 5-10 Days
• class: Standard
• service: USPS Ground Advantage
• cost: $8.13

returns hamamateuradio:

• policy: No Returns

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