Bird 8327 RF Coaxial Attenuator

The Bird 8327 is a coaxial RF attenuator designed for reducing signal power in radio frequency circuits, offering a robust construction for reliable performance. This oil-cooled attenuator is engineered for continuous, high-load applications up to 500 MHz, making it suitable for demanding test benches, integration labs, and field-deployed systems where precise signal control and operational uptime are critical. Its design focuses on passive cooling, low VSWR performance, and Bird’s established reliability, ensuring dependable operation without the need for fans or external power for cooling.

### Technical Specifications

* **Model:** Bird 8327-300
* **Type:** Oil-Cooled RF Attenuator
* **Attenuation:** 30 dB
* **Power Rating:** 1 kW continuous
* **Frequency Range:** DC to 500 MHz
* **VSWR:**
* Input: 1.10:1.0 maximum (DC – 500 MHz)
* Output: 1.15:1.0 Maximum (DC – 500 MHz)
* **Impedance:** 50 Ohms nominal
* **Cooling Method:** Oil-Cooled; natural convection using refined mineral oil
* Coolant Volume: 2.9 gal. (11 liters)
* **Calibration Accuracy:** ±0.2 dB
* **Calibration Frequencies:** 30, 100, 200, 300, 400, 500 MHz
* **Absolute Accuracy:** ±0.5 dB (with calibration data supplied for specified frequencies accurate to ±0.2 dB)
* **Power Sensitivity Correction:** -1 x 10⁻⁶ dB/Watt/MHz ±0.2 dB
* **Construction:** Symmetrical “T” pad with exponentially tapered housing for impedance matching. Utilizes resistive film-on-ceramic cylindrical resistors immersed in dielectric coolant.

### Electrical Characteristics

* **Maximum Power Dissipation:** 1000 Watts

### Interfaces

* **Input Connector:** Female “LC”, Bird “QC” (Quick-Change)
* **Output Connector:** Female “N”, Bird “QC” (Quick-Change)

### Physical Characteristics

* **Operating Position:** Horizontal only
* **Dimensions (L x W x H):** 23-15/16″ x 7-1/8″ x 17-3/16″ (596 x 181 x 437 mm)
* **Weight:** 57 lbs. (26 kg)
* **Housing Finish:** Gray Powder Coat

### Environmental and Operating Conditions

* **Operating Temperature:** -40 to +45 °C (-40 to +113 °F)
* **Coolant:** Refined Mineral Oil

### Features and Benefits

* **Oil-Cooled Design:** Handles sustained 1 kW loads with thermal stability, suitable for long-duty cycles and continuous operation.
* **Low VSWR:** Ensures clean signal handling, reducing power levels and VSWR without signal distortion, ideal for testing, calibration, and system protection.
* **Rugged Construction:** Built for reliability and years of trouble-free use with no fans, AC power, or complex setup requirements.
* **Quick-Change (QC) Connectors:** Facilitates convenient and easy interchange with other “AN” type QC connectors.
* **Passive Cooling:** Operates using natural convection with a dielectric coolant, eliminating the need for external cooling utilities.
* **Optional Thermoswitch:** Available as an option (P/N 2450-056) to act as an interlock switch, disabling transmitter power if coolant temperature exceeds a preset limit, preventing damage from overloading.

Why Choose Aumictech for Bird 8327?
At Aumictech, we specialize in supplying high-end RF attenuator equipment. Whether you need precise signal power reduction, robust protection for sensitive components, or reliable performance in high-load RF testing scenarios, our team ensures the Bird 8327 delivers maximum performance and longevity for your application.