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MODEL 43
Over 250,000 Model 43 wattmeters havebeen produced!
The Model 43 THRULINE® Directional Wattmeter accurately measurement forward or
reflected power in coaxial transmission lines under any load condition. Each Model
43 consists of a line section, "QC" (Quick-Change) connectors and an indication
meter housed in a rugged, corrosion resistant aluminium case.
The line section is a high precision 50 ohm coaxial air line that inserts between
the transmitter and the antena or load. A socket is provided in each line section
for a plug-in element with the desired power rating and frequency range. Line
section ends are equiped with "QC"-type connectors.
The Model 43 is supplied with two female "N"-type "QC" connectors. These
connectors can be interchanged in the field without affecting instrument calibration.
The instrument's indicating meteris a shok mounted 30 microampere meter with
scales of 25, 50, and 100; permityingfull-scale direct power reading from 100 milliwatts to 10,000 watts.
Plug-in elements determinate the power rating and the frequency range, and these
values are marked on each element. The elements rotate to read both forward and
refliected power. There id no need for a calibration charts or instrument adjustmenrs.
Elements can be purchased at any time and replaced in the field . For added convenience,
Model 43 connectors and elements interchangeable with many other Bird wattmeters.
Remote installation can easily be archieved by removing the Model 43's RF line
section and inserting it at desired point in the line .For best visiable, the meter
itself can be relocated using the 32 in.meter cable supplied in the instrument
housing. Additional meter cable length can be ordered deparately.
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Power Range:
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100 mW to 10 kW using Bird Plugin Elements*
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Frequency Range:
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450 kHz to 2.7 GHz (depending on element)
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Insertion VSWR:
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with N Connectors 1.05 max. to 1000 MHz
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Accuracy:
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±5% of full scale
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Connectors: QC Type
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(Female N normally supplied)
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Finish:
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Light Navy gray baked enamel (MIL-E-15090)
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Nominal Size:
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(includes connectors) 6-7/8"H x 5-1/8"W x 3-5/8"D (175 mm x 130 mm x 92 mm)
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Weight:
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3 lbs. (1.4 kg)
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*Quoted accuracy only whrn other Bird products.
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