MOTOROLA 01854174U05 Celwave Rfs Duplexer Celwave/rfs/motorola 6-CAVITY 435-470MHZ

( Brand: Motorola ), ( Manufacturer Part Number: 01854174U05 ), ( Color: Black ), ( Type: Infrastructure )

Review MOTOROLA Celwave/rfs/motorola 6-cavity Duplexer 435-470mhz

The **Motorola 01854174U05 CelWave/RFS 6-Cavity Duplexer (435 470 MHz)** is a high-performance, ruggedized RF component designed for demanding two-way radio and amateur radio applications operating in the 435 470 MHz frequency range. This duplexer is engineered to efficiently separate transmit and receive signals, ensuring optimal performance in both mobile and base station setups where simultaneous transmission and reception are critical. Built with precision, the device features a **6-cavity design**, which provides superior isolation between the transmit and receive paths, minimizing interference and maximizing signal clarity. Its compact yet durable construction is ideal for integration into compact antenna systems, repeaters, or portable radio installations where space and reliability are paramount.

Constructed with **high-quality materials**, including corrosion-resistant metals and dielectric components, the duplexer is engineered to withstand harsh environmental conditions, including extreme temperatures, humidity, and mechanical stress. This makes it a dependable choice for field deployments, emergency communications, and professional radio systems where reliability is non-negotiable. The **435 470 MHz frequency coverage** ensures compatibility with a wide range of radio systems, including Motorola s CelWave and RFS series, as well as third-party equipment operating within this band. Whether used in a base station, mobile unit, or portable setup, this duplexer delivers consistent performance, reducing the need for external filters and simplifying system design.

The **duplexer s robust construction** includes precision-machined cavities and high-efficiency waveguides, which work together to minimize signal loss while maintaining excellent isolation typically exceeding **40 dB** between transmit and receive ports. This level of performance ensures that transmitted signals do not overwhelm the receiver, preventing distortion and improving overall audio quality. Additionally, the device is designed for easy installation, featuring standard **N-type female connectors** (or alternative options depending on configuration) that allow for quick and secure connections to antennas and radio equipment. Its modular design also makes it adaptable for integration into larger RF systems, including repeaters, base stations, or custom-built radio setups.

For professionals in public safety, amateur radio enthusiasts, or commercial communications, the **Motorola 01854174U05 duplexer** represents a reliable solution for maintaining clear, interference-free communications. Its combination of **high isolation, broad frequency range, and rugged durability** makes it a versatile component for both new installations and upgrades to existing systems. Whether deployed in a mobile unit, fixed location, or portable setup, this duplexer ensures that transmit and receive signals operate independently, enhancing overall system efficiency and performance. Built to Motorola s stringent quality standards, it provides the confidence of long-term reliability in even the most demanding operational environments.

### **Pros and Cons of buying a Motorola 01854174U05 Celwave/RFS 6-Cavity Duplexer (435 470 MHz)**

#### **Pros**

1. **High Performance in VHF/UHF Bands**

The duplexer is designed for the 435 470 MHz range, which is commonly used in amateur radio, aviation, and military/commercial communications. Its six-cavity design provides efficient isolation between transmit and receive paths, reducing interference and improving signal clarity.

2. **Durable Construction**

Motorola (or its subsidiaries like Celwave/RFS) is known for manufacturing rugged, high-quality RF components. This duplexer is likely built to withstand harsh environmental conditions, making it suitable for field use, mobile installations, or fixed stations.

3. **Wide Bandwidth Coverage**

- Amateur radio (2-meter band, repeaters)

- Aviation (transponder frequencies)

- Military/commercial radio systems

- Satellite communications (e.g., APRS, weather balloons)

This flexibility makes it a valuable component for hobbyists, professionals, and emergency communicators.

4. **Compatibility with Motorola Radios**

Since it is a Motorola part (or designed for their ecosystem), it is likely to integrate seamlessly with Motorola radios (e.g., GM300, GM350, or other VHF/UHF models). This reduces compatibility issues and ensures optimal performance.

5. **Long-Term Availability**

Motorola s legacy components often remain in production or are easily sourced through distributors like Celwave, RFS, or eBay. This reduces the risk of obsolescence compared to proprietary or niche brands.

6. **Professional-Grade Isolation**

A six-cavity duplexer offers superior isolation between transmit and receive frequencies, minimizing desensitization and intermodulation products. This is critical in environments with high signal density (e.g., repeaters, base stations).

7. **Modular and Upgradable**

Duplexers like this can be paired with other RF components (e.g., filters, amplifiers) to extend functionality. For example, it can be used in conjunction with a band-pass filter for narrower bandwidth applications.

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#### **Cons**

1. **Potential Age-Related Reliability Issues**

Motorola s older part numbers (like 01854174U05) may be from discontinued or legacy lines. While the component itself may still function well, finding replacement parts or technical support could become difficult over time. Always verify the exact model s production date or compatibility with your system.

2. **Cost Compared to Alternatives**

This is a professional-grade duplexer, and its price may be higher than generic or aftermarket alternatives. For hobbyists or budget-conscious users, cheaper (but potentially less durable) duplexers from brands like **RFS, Celwave, or even DIY solutions** (e.g., homebrew filters) might suffice.

3. **Limited Customization**

Unlike some modern RF components, this duplexer does not offer adjustable or programmable settings. Its fixed bandwidth (435 470 MHz) means it cannot be repurposed for other frequency ranges without additional hardware.

4. **Potential for Counterfeit Parts**

Since this is an older part, there is a risk of purchasing counterfeit or refurbished units with unknown reliability. Buying from reputable sellers (e.g., authorized distributors, well-reviewed eBay shops) mitigates this risk but adds an extra layer of caution.

5. **Weight and Size**

As a six-cavity duplexer, it is likely bulkier than smaller, single-cavity units. This may be a consideration for portable or space-constrained setups (e.g., mobile vehicles, handheld rigs).

6. **Dependence on Motorola Ecosystem**

While it works well with Motorola radios, it may not be ideal for non-Motorola equipment unless proper interfacing is ensured. Some radios may require additional matching networks or adjustments to work optimally.

7. **Potential for Signal Loss**

High-quality duplexers like this one are designed to minimize loss, but no component is perfect. In some cases, the insertion loss (typically

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### **Conclusion**

The **Motorola 01854174U05 6-Cavity Duplexer (435 470 MHz)** is a **high-performance, durable, and versatile** component ideal for **professional, amateur, or military/commercial communications** requiring reliable frequency separation. Its **six-cavity design ensures strong isolation**, making it suitable for **repeaters, base stations, or high-density RF environments**. The **Motorola brand guarantees quality and compatibility** with their radio systems, and its **wide bandwidth coverage** adds to its utility.

However, **potential drawbacks** include **higher cost, limited customization, age-related reliability concerns, and the risk of counterfeit parts**. If you are working within the **Motorola ecosystem** or need a **rugged, high-isolation duplexer for critical applications**, this is an excellent choice. For **budget-conscious hobbyists or those requiring non-Motorola compatibility**, alternatives like **Celwave s generic duplexers or DIY solutions** may be worth considering.

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### **Recommendation**

- You are using **Motorola radios** (e.g., GM300, GM350, or similar).

- You need **reliable, high-isolation duplexing** in the **435 470 MHz range** (e.g., for repeaters, aviation, or satellite communications).

- You prioritize **durability and long-term availability** over cost.

- You are working in an **environment with high RF density** where interference mitigation is critical.

- You are on a **tight budget** and can find a **similarly rated generic duplexer** (e.g., from Celwave or RFS) at a lower price.

- You need **adjustable or narrower bandwidth** options.

- You are unsure about the **authenticity of the part** and prefer newer, supported components.

- You are using **non-Motorola radios** and require additional testing for compatibility.

For **serious users** who need a **proven, high-performance duplexer** in the specified range, this Motorola part is a **strong recommendation**. Always verify the **exact model s specifications** and **source it from a trusted seller** to avoid counterfeit or damaged units. If you are unsure, consult with an **RF engineer or experienced amateur radio operator** to confirm compatibility with your setup.

Details:

Frequency Range: 435-470 MHz. Model Number: 01854174U05. This Product is Identical to the TLE9022. FREE Shipping.

Money Back Or Replacement. Used radios-live. CELWAVE/RFS/MOTOROLA 6-CAVITY DUPLEXER 435-470Mhz 01854174U05: The unit is in good condition, has normal cosmetic wear, and been pulled from a working system.

Tuning to frequency available.

part #: 01854174u05 price

• $1195.00

specifications twowayradiobob:

• brand: Motorola
• mpn: 01854174u05
• color: Black
• type: Infrastructure

seller twowayradiobob:

• city: Denver, Colorado
• # reviews: 21945
• rating: 99.8%

general twowayradiobob:

• condition: Used
• Consumer Electronics > Radio Communication > Walkie Talkies, Two-Way Radios

payments twowayradiobob:

• credit card: Mastercard
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• wallet: Apple-pay

returns twowayradiobob:

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

shipping twowayradiobob:

• transit: 9-15 Days
• cost: $0.00
• service: Standard
• class: Standard
• type: Fixed

offer twowayradiobob:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• started: June 3, 2026
• quantity: 1

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