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4381 Bird Digital Wattmeter (Pull)

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4381 Bird Digital Wattmeter
Used great condition * No longer available for export
MFR: Bird Electronics, USA
SKU: 4381-1

The 4381 Wattmeter reads both forward and reflected power output for CW, symmetrical AM, FM, and SSB. The meter is also capable of calculating SWR,dB return loss and the percent modulation of a device.

Made in the USA

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4381 Bird Digital Wattmeter (PULL)

Used great condition * No longer available for export
MFR: Bird Electronics

The Bird 4381 is a digital RF wattmeter for two-way communications, avionics, C³, radar and many other applications. At the push of a button, this new wattmeter can perform the following functions:

  • Read incident and reflected CW and FM power in watts or dBm
  • Read incident and reflected peak-envelope-power of SSB/DSB and symmetrical AM in watts
  • Read incident and reflected peak pulse power as narrow as 50 micro-seconds in watts
  • Calculate SWR, dB return loss, percent modulation
  • Remember peak and valley readings when adjustments for maximum or minimum signal levels are made
  • Over-range at least 20 percent beyond nominal full scale
  • Frequency: 0.45 to 2700 MHz
  • Power: 100 mW to 10 kW with 20% over-range. Reads forward and reflected CW or FM power in watts or dBm, Peak Envelope Power or SSB/DSB and symmetrical AM in watts, and peak power for pulses as narrow as 0.8us Calculates SWR, return loss in dB and % modulation Stores peak and multi readings to facilitate adjustment of maximum and minimum signal levels Shock-resistant keyboard and range switches. RFI protection
  • Power Range: 100mW to 10kW using Bird Plug-in Elements
  • Frequency Range: 450 kHz to 2.7 GHz
  • Insertion VSWR: with N connectors 1.05 max to 1000 MHz
  • Power Readings: ±5% of full scale CW ±8% PEP
  • VSWR: 10% of reading
  • Modulation: (CW power 1/3 or more of full scale) ±5% (0-90%)   ±10% (90-100%)
  • Usable Over-range: to 120% of scale (CW, PEP, SWR and Return Loss)
  • Sampling Rate: 2 to 3 readings per second
  • Display: 3 1/2 digit, 0.3” LED strobed
  • Modulation Frequency: 25 to 10,000 Hz (audio)
  • Pulse Parameters: (min.) Pulse width 0.8us (100-2700 MHz) 1.5us (26-99 MHz) 15us (2-25 MHz) Repetition Rate 25 PPS, and Duty Factor 1 x 10-4min.
  • Return Loss: ±3% dB to corresponding SWR value
These units are used and in great working condition.
Powercord not available
Please view our warranty page for information regarding our warranty policy.
Made in the USA

Additional Information

Featured Product No
Made in the USA Yes
NATO Stock Number N/A
Manufacturer Part Number N/A
Manufacturer No
Condition Used
Call For Price No
Manufacturer Name Bird Electronics

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