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8329-300,4kw, Oil-Cooled RF Attenuator
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Personal Greeting

8329-300, Tenuline® RF Power Attenuators are a valuable and reliable accessory for reducing power levels and VSWR, for isolating components under test, for harmonic signal analysis, and as comparison standards. Bird's RF attenuators are world renowned for their high quality, robust construction and conservative power ratings.

  • Easy to Use
  • Rugged, reliability provides years of trouble free use
  • Incorporates either a BA-300 Series, 115 VAC or 230 VAC Blower unit

product specifications:

Item No


Item Name

4000 W, Oil-Cooled Attenuator with 115 VAC or 230 VAC Blower Unit

Power Rating

4 KW continuous with blower on, 1000 W with blower off

VSWR and Frequency Range

DC to 500 MHz @ Input 1.1 max.

Product Type

Oil-Cooled with 115 VAC or 230 VAC Blower Unit


2.9 gal. (11 liters) Silicone Oil with forced-air cooling




±0.5 dB (Calibration Data supplied for 30, 100, 200, 300, 400, and 500 MHz which is accurate to ±0.2 dB)


LC (F) -Input
N (F) -Output

Operating Temperature

-40 to +45 °C (-40 to +113 °F)

Operating Position

Horizontal Only


Gray Powder Coat


23-15/16" x 7-1/8" x 22-1/16" (L x W x H)
596 x 181 x 560 mm


70-1/2 lbs. (32 kg)

Accessories - Options

8329-028 Overload thermoswitch

For more information, click here.


Declaration of Conformity