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Chapter 7
These specifications include data covering the Bird 43, 43P, 4305A,
4431, 4521, 4522, 4523, 4525, 4526,
models not listed are identical to the Bird 43.
and 4527. Specifications for
Specifications
Impedance, Nominal
VSWR, Max.
All models except 4431
4431
Connectors
Primary Line
RF Sampling (on applicable
models)
Power and Frequency Range (element dependent)
43,43P,4521/22/23/25/26
4305
50 ohm
1.05:1
1.07:1 (when coupling is less than
30 dB)
supplied)
Female BNC
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Bird Model 43 Wattmeter
4431*
4527
RF Coupling
4527 (approximate)
4431 (adjustable)
Insertion Loss (4431 only)*
Accuracy
0.1 dB max
0.1 dB max
CW (all models)
Peak Power (43P only)
Power Requirement (43P only)
Battery Life (43P only)
Dimensions, Nominal
43, 43P
4305A
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± 5% of full scale
± 8% of full scale
Two 9V alkaline batteries
(NEDA 1604)
48 hours typical
(92 x 102 x 175 mm)
(108 x 99 x 175 mm)
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4431
4521/22/23/25/26/27
Weight, Nominal
Specifications
(99 x 102 x 175 mm)
(483 x 134 x 45 mm)
43, 4521/22/23/25/26/27
43P
4431
4305A
Operating Position
Finish
* Applicable only for maximum coupling
a minimum decoupling of four full tu
and seven full turns above 800 MHz
3 lb. (1.36 kg)
4 lb. (1.8 kg)
3.5 lb. (1.59 kg)
3.25 lb. (1.47 kg)
Any
Grey Powder Coat
rns counterclockwise above 200 MHz,
less than 30 dB. This requires
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