HP 87405A Agilent Amplifier Hp/agilent 10MHZ-3

( Brand: Hp ), ( Manufacturer Part Number: 87405A ), ( Part Type: Amplifier ), ( Paese Di Origine: Stati Uniti ), ( Banda: 3 Ghz ), ( Tipo: Preamplificatore ), ( Marca: Hp Agilent ), ( Modello: Mixer ), ( Potenza: 10dbm ), ( Garanzia Produttore: No ), ( Anno Di Fabbricazione: 2000 )

Review HP Hp/agilent Pre Amplifier Ghz Working

The **HP 87405A (Agilent Technologies) 10 MHz to 3 GHz Amplifier** is a high-performance, broadband microwave amplifier designed for precision signal amplification in demanding RF and microwave applications. Part of the renowned HP/Agilent series, this amplifier delivers exceptional gain, stability, and reliability, making it an indispensable tool for engineers, researchers, and technicians working in fields such as telecommunications, radar systems, satellite communications, and scientific instrumentation. With a frequency range spanning from **10 MHz to 3 GHz**, the 87405A provides a versatile solution for amplifying weak signals while maintaining minimal distortion and noise, ensuring high-fidelity performance across a wide spectrum. Constructed with robust engineering, this amplifier features a **gain of approximately 20 dB** (adjustable via control) and a **low noise figure**, typically below **3.5 dB**, which is critical for preserving signal integrity in sensitive measurement environments. Its compact yet durable design incorporates high-quality materials and precision components, including a **hermetically sealed housing** to protect against environmental factors such as moisture and dust, ensuring long-term operational stability. The amplifier s **wideband performance** is complemented by a **flat frequency response**, reducing variations in gain across the operating range, which is essential for applications requiring consistent signal amplification. Additionally, the 87405A is equipped with **built-in protection circuits** to safeguard against overvoltage, overcurrent, and thermal overload, enhancing its durability in both laboratory and field deployments. Its **modular design** allows for easy integration into existing test systems, making it compatible with a variety of RF measurement setups, including spectrum analyzers, network analyzers, and signal generators. Whether used for signal conditioning, amplification in experimental setups, or as part of a larger RF chain, the HP 87405A exemplifies Agilent s commitment to delivering precision, durability, and performance in microwave amplification technology. Its legacy as a trusted component in professional-grade equipment ensures that users can rely on it for consistent, high-quality results in their most critical applications.

### **Pros and Cons of buying a HP 87405A (Agilent) Amplifier (10 MHz 3 GHz)**

1. **High Performance and Reliability** The HP 87405A is a well-regarded broadband amplifier known for its stability and low noise figure, making it suitable for precision applications in RF and microwave testing.

2. **Wide Frequency Range (10 MHz 3 GHz)** The broad bandwidth allows it to be used in various applications, including signal amplification for test equipment, communication systems, and laboratory setups.

3. **Moderate Power Output (10 W at 1 GHz)** Sufficient for many experimental and testing purposes without requiring excessive cooling or complex power management.

4. **Compact and Portable Design** Compared to some high-power amplifiers, this unit is relatively small, making it easier to integrate into benchtop setups or portable systems.

5. **Compatibility with Agilent/HP Test Equipment** Since it is part of the Agilent ecosystem, it works seamlessly with other HP/Agilent instruments like signal generators, spectrum analyzers, and network analyzers.

6. **Good for Educational and Research Use** Its balance of performance and cost makes it a practical choice for universities, research labs, and hobbyist projects requiring reliable amplification.

7. **Long-Term Availability** Being an older but still widely used model, spare parts and technical support may still be accessible through second-hand markets or specialized suppliers.

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1. **Age and Obsolescence** The HP 87405A is an older model (discontinued by Agilent), meaning it lacks modern features like digital control interfaces, software integration, or firmware updates.

2. **Limited Power for High-Demand Applications** At 10 W output, it may not be sufficient for industrial or high-power RF applications, requiring additional amplification stages in some cases.

3. **No Built-in Protection Features** Unlike newer amplifiers, it may lack automatic overload protection, thermal shutdown, or remote monitoring capabilities, increasing the risk of damage if misused.

4. **Potential for Higher Maintenance** Older electronics may require more frequent calibration or part replacements compared to newer, more robust designs.

5. **No Modern Connectivity** Lacks USB, Ethernet, or digital control options, limiting automation and integration with contemporary test systems.

6. **Higher Cost for a Discontinued Model** Purchasing a new or refurbished unit may be more expensive than newer alternatives, especially if sourced from third-party sellers.

7. **Limited Warranty or Support** Original warranties are likely expired, and technical support from Agilent may be unavailable, relying instead on community forums or independent technicians.

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### **Conclusion and Recommendation**

The **HP 87405A is a solid choice for users who prioritize performance, reliability, and compatibility with legacy HP/Agilent systems** particularly in educational, research, or low-to-moderate power testing environments. Its wide bandwidth, stability, and proven track record make it a practical amplifier for many applications where modern features are not critical.

- **Mini-Circuits ZVE-3W-3G ** (broadband, low noise, modern design)

- **Keysight N5183A** (high-performance, digitally controlled)

- **Amplifier Research 100W series** (for industrial applications)

may be more suitable.

- You need a reliable, mid-range amplifier for legacy HP/Agilent setups.

- Budget constraints or availability make it the best option.

- You are working in an environment where modern connectivity is not required.

- You need digital control, automation, or long-term support.

- Your application demands higher power or more advanced features.

- A newer, more efficient amplifier is within budget.

For most modern RF testing or industrial applications, investing in a newer amplifier with better protection and integration capabilities is advisable. However, for niche or historical applications, the HP 87405A remains a capable and enduring choice.

Details:

With a reliable brand reputation and specific frequency band of 3 Ghz, this pre amplifier is valuable addition to radio communication systems for improving signal strength clarity. The HP/Agilent 87405A Pre Amplifier is a high-quality pre amplifier designed for radio communication in the range of 10mhz to 3 Ghz. Unit will arrive working. Made in the USA by HP Agilent, this mixer model has a power gain of 10dbm and is suitable for ham radio transmitters amateur enthusiasts.

part #: 87405a prices

• $499.95-$2499.00

specifications hamamateuradio:

• brand: Hp
• mpn: 87405a
• part type: Amplifier
• paese di origine: Stati Uniti
• banda: 3 Ghz
• tipo: Preamplificatore
• marca: Hp Agilent
• modello: Mixer
• potenza: 10dbm
• garanzia produttore: No
• anno di fabbricazione: 2000

general hamamateuradio:

• Radio Communication > Ham, Amateur Radio > Ham Radio Transmitters
• condition: Used

shipping hamamateuradio:

• transit: 3-9 Days
• service: Standard
• class: Standard
• cost: $8.00
• type: Fixed

seller hamamateuradio:

• # reviews: 13232
• city: Hayward, California
• rating: 99.9%

returns hamamateuradio:

• method: Money back
• paid by: Buyer
• time: 30 Days
• policy: Returns Accepted

payments hamamateuradio:

• other
• wallet: Apple-pay
• credit card: Discover

offer hamamateuradio:

• options: Ship-to-home
• started: April 8, 2026
• availability: In Stock
• sold: 0
• quantity: 1

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