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Lectrosonics WM-20



Water Tight Transmitter, Variable RF Power, with mic, Block 20 (512.000 - 537.500 MHz)

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Designed for wet or dusty environments, the WM transmitter features O-ring sealed battery compartments and input jack, a compression sealed antenna port and gasket sealed control panel and back cover. Dual AA batteries provide twice the operating time of earlier watertight transmitter designs. Larger membrane switches and control panel and a highly visible, backlit LCD enhance the user interface.

Contact BSW for your pricing and shipping!

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  • Main Features:
  • Selectable output power to maximize battery life or operating range
  • Machined aluminum, corrosion resistant housing
  • Water resistant seals for use in wet environments
  • LCD interface with lockout option
  • Programmable compatibility modes for use with a wide variety of different receivers
  • Servo Bias input circuitry with selectable voltage
  • Specifications:
  • Channel Spacing: 100 kHz
  • Frequency selection: Control panel mounted membrane switches
  • RF Power output: Switchable; 50, 100 or 250 mW
  • Compatibility Modes (6) Digital Hybrid Wireless® (400 Series), 200 Series, 100 Series, Mode 3, Mode 6, IFB
  • Pilot tone: 25 to 32 kHz; 5 kHz deviation (in 400 Series Hybrid Mode)
  • Frequency stability: ± 0.002%
  • Deviation: ± 75 kHz max. (in 400 Series Mode)
  • Spurious radiation: 60 dB below carrier
  • Equivalent input noise: –125 dBV, A-weighted
  • Input level:
  • Dynamic mic: 0.5 mV to 50 mV before limiting. Greater than 1 V with limiting.
  • Electret lavaliere mic: 1.7 uA to 170 uA before limiting. Greater than 5000 uA (5 mA) with limiting.
  • Line level input: 17 mV to 1.7 V before limiting. Greater than 5 V with limiting.
  • Input impedance:
  • Dynamic mic: 300 Ohms
  • Electret lavaliere: Input is virtual ground with servo adjusted constant current bias
  • Line level: > 2.7 k Ohms
  • Input limiter: Soft limiter, 30 dB range
  • Bias voltages: Selectable; 2V, 4V and Off
  • Gain control range: 44 dB; panel mounted membrane switches
  • Modulation indicators: Dual bicolor LEDs indicate modulation of –20, -10, 0, +10 dB referenced to full modulation
  • Controls: Control panel with LCD and four membrane switches