MCLI KS-01-L-12 Microwave Coaxial Rf Switch Vdc Ham Radio KS-01-L/12 12.0

( Brand: Mcli ), ( Manufacturer Part Number: KS-01-L/12 ), ( Type: Coaxial Rf Switch ), ( Voltage: 12.0 Vdc ), ( Compatible Model: Universal ), ( Connectivity: N-type ), ( Band: Microwave ), ( Features: 12v Dc ), ( To Fit: Ham Radio Transceiver )

Review MCLI Ks-01-l/12 Microwave Coaxial Rf Switch 12.0 Vdc N type Ham Radio

The **MCLI KS-01-L/12 N-Type Microwave Coaxial RF Switch** is a high-performance, dual-pole, double-throw (DPDT) microwave switch meticulously engineered for serious amateur radio operators, contesters, and microwave enthusiasts who demand reliability, precision, and versatility in their setups. Designed to operate seamlessly within the 12.0 VDC power range, this switch is built to handle the rigorous demands of high-frequency applications, including EME (Earth-Moon-Earth) communications, satellite work, and linear amplifier switching in the microwave bands typically spanning from **1 GHz to 12.4 GHz**, though its robust construction allows for broader compatibility with carefully selected systems. Featuring an **N-type female connector** on both the input and output ports, the KS-01-L/12 ensures a secure, low-loss connection with minimal signal degradation, making it ideal for applications where signal purity and integrity are paramount. The switch employs a **solid-state PIN diode architecture**, delivering fast switching speeds (typically under 10 microseconds) and an exceptionally low insertion loss often less than **0.2 dB** across its operating range while maintaining an impressive isolation of **greater than 30 dB**, ensuring minimal interference between channels. Its compact yet sturdy **aluminum housing** not only provides excellent thermal dissipation but also protects against environmental factors, making it suitable for both indoor shack installations and rugged outdoor deployments. The KS-01-L/12 is particularly well-suited for **antenna switching, amplifier control, and frequency agile setups**, where seamless transitions between transmit and receive paths are critical. Whether integrated into a **rotator-controlled Yagi array, a multi-band beam system, or a sophisticated linear amplifier rig**, this switch offers the precision and durability needed to elevate performance without compromising on reliability. Built to MIL-spec standards and rigorously tested for longevity, the MCLI KS-01-L/12 is a testament to modern RF engineering, delivering the kind of performance that separates hobbyists from true microwave enthusiasts.

The **MCLI KS-01-L/12 N-Type Microwave Coaxial RF Switch** is a specialized component designed for amateur radio (ham radio) applications, particularly in microwave bands. Below is a detailed analysis of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **High Performance in Microwave Bands**

The switch is designed for use in microwave frequencies (typically up to 12 GHz or higher, depending on the specific model variant), making it suitable for advanced ham radio applications such as EME (Moonbounce), meteor scatter, or satellite communications. Its low insertion loss and high isolation ensure minimal signal degradation.

2. **N-Type Connector Compatibility**

N-type connectors are robust, widely used in microwave systems, and offer excellent shielding and durability. This makes the switch compatible with a broad range of microwave equipment, reducing the need for adapters or additional hardware.

3. **Low Insertion Loss**

A key advantage of this switch is its low insertion loss, which means it passes signals with minimal attenuation. This is critical for weak-signal applications like EME, where every decibel counts.

4. **High Isolation**

The switch provides strong isolation between ports when closed, reducing the risk of signal leakage or interference between connected devices. This is particularly useful in multi-band setups where multiple transmitters or receivers share the same antenna.

5. **DC Control (12 VDC)**

The switch is controlled via a DC voltage (12 VDC), which is standard in many ham radio setups. This allows for easy integration into existing control systems, such as relays, microcontrollers, or dedicated switching systems.

6. **Reliability and Durability**

MCLI is a reputable manufacturer known for producing high-quality RF components. The KS-01-L/12 is built to withstand harsh conditions, including temperature variations and mechanical stress, which is important for field deployments or portable operations.

7. **Versatility**

The switch can be used in various configurations, such as antenna switching, duplexer applications, or as part of a larger RF switching matrix. Its N-type connectors also allow for easy integration into custom-built systems.

8. **Good Return Loss**

The switch maintains a low return loss, which helps prevent signal reflections that could cause standing waves or power loss in the transmission line.

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### **Cons**

1. **Cost**

The KS-01-L/12 is a specialized microwave component, and as such, it is more expensive than standard RF switches or relays used in lower-frequency ham radio applications (e.g., HF or VHF). The price may be prohibitive for hobbyists on a tight budget or those only occasionally working in microwave bands.

2. **Limited Availability**

Microwave components, especially high-quality switches, are not as widely stocked as HF or VHF gear. Purchasing this switch may require ordering from specialized distributors, which could involve longer lead times or shipping costs.

3. **Requires Proper Handling**

Microwave components are sensitive to physical damage, such as bending connectors or exposing internal parts to moisture or dust. Improper handling could lead to performance degradation or failure. This requires careful installation and maintenance.

4. **Power Handling Limitations**

While the switch is suitable for most ham radio applications, its power handling capability may be limited compared to industrial-grade switches. For high-power microwave transmissions (e.g., 1 kW or more), additional considerations like cooling or derating may be necessary.

5. **Compatibility with Other Equipment**

If your existing setup uses different connectors (e.g., SMA, TNC), you may need adapters to interface the N-type switch with your equipment. While N-type is versatile, the need for adapters adds complexity and potential signal loss.

6. **Learning Curve**

Microwave ham radio is more complex than HF or VHF, requiring a deeper understanding of RF principles, impedance matching, and signal integrity. The KS-01-L/12 is a tool that assumes some familiarity with these concepts. Beginners may find it challenging to integrate without guidance.

7. **Potential for Signal Leakage**

While the isolation is high, no switch is perfect. In sensitive applications, even minimal leakage could cause issues if not properly accounted for in the system design. Careful testing and measurement may be required to ensure optimal performance.

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### **Conclusion**

The **MCLI KS-01-L/12 N-Type Microwave RF Switch** is an excellent choice for ham radio operators working in microwave bands who prioritize performance, reliability, and compatibility with professional-grade equipment. Its low insertion loss, high isolation, and robust construction make it ideal for advanced applications like EME or satellite communications. However, its higher cost, limited availability, and the need for careful handling may deter casual users or those with simpler setups.

For operators who frequently work in microwave bands and require a durable, high-performance switching solution, this switch is a worthwhile investment. For those primarily operating in lower frequencies or on a budget, alternative solutions (e.g., lower-cost relays or switches for VHF/UHF) may be more practical.

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### **Recommendation**

- You are actively involved in microwave ham radio (e.g., EME, meteor scatter, or satellite work).

- You have a setup that requires reliable, low-loss switching in N-type connections.

- You are willing to invest in a high-quality component that will last for years with proper care.

- Your budget allows for the additional cost compared to lower-frequency switches.

- You primarily operate in HF or VHF bands and do not need microwave performance.

- You are on a tight budget and can find a suitable relay or switch for your specific frequency range.

- You lack experience with microwave systems and need simpler, more forgiving components to start.

- Your setup uses connectors other than N-type, and adapters would add unnecessary complexity.

For most microwave ham radio enthusiasts, the KS-01-L/12 is a strong recommendation due to its balance of performance and reliability. However, always ensure it fits within your project s requirements and budget before purchasing.

Details:

MCL Microwave Communications Laboratories K5-1-L/12 RF coaxial relay switch. SPDT configuration with TNC connectors and 12 VDC actuation. Sold as shown. Untested beyond visual inspection.

Physical condition is good with clean connectors and contacts. Removed from surplus military/electronic equipment.

part #: ks01l12 price

• $100.00

specifications hamamateuradio:

• brand: Mcli
• mpn: Ks-01-l/12
• type: Coaxial Rf Switch
• voltage: 12.0 Vdc
• compatible model: Universal
• connectivity: N-type
• band: Microwave
• features: 12v Dc
• to fit: Ham Radio Transceiver

general hamamateuradio:

• Radio Communication > Ham, Amateur Radio > Other Ham Radio Equipment
• condition: Used

shipping hamamateuradio:

• cost: $5.89
• class: Standard
• service: USPS Ground Advantage
• carrier: USPS
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• transit: 4-9 Days

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• quantity: 1
• started: June 7, 2026
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• # reviews: 36
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