Bird - The RF Experts

450 kHz - 2.3 GHz, 50W - 25 KW, High-Power RF Wattmeter

The 4305A RF Wattmeter is a field-proven portable, insertion-type instrument designed to measure both forward and reflected CW power in coaxial transmission lines under any load condition. With a full-scale accuracy of ± 5%, it accurately measures RF power with low added VSWR and insertion loss. QC (quick change) type connectors and a full range of plug-in elements provide a wide choice of frequency ranges and power levels.

  • Accurate CW power measurement over 450 kHz to 2.3 GHz and 50 W to 25 KW
  • Uses 4305A and 1-5/8" elements
  • Constructed with a 1-5/8” line section for higher power measurements
  • Quick Change (QC) connectors to minimize the need for adaptors when making critical measurements

product specifications:
Item No
Item Name
High-Power Wattmeter
Power Range
50 W to 25 kW using Bird® Plug-in Elements
Frequency Range
450 kHz to 1.8 GHz (depending on element)
Insertion VSWR
N Connectors 1.05 max.
± 5% of full scale
QC Type (Female N normally supplied)
Light Gray Powder Coat
(H x W x D)
6.31 in x 5.13 in x 4.25 in, including connectors
(161 mm x 131 mm x 108 mm)
3.25 lbs. (1.5 kg)
compatible devices:
4305A Elements
4305A Elements
Table 1-5/8AA - 30μA Standard
1-5/8" Standard Elements 30μA
Carrying Case - 12 Plug-In Elements