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Comtek - BST-25/216 Transmitter

Comtek - BST-25/216 Transmitter
Comtek - BST-25/216 Transmitter
Product Code: BST 25-216
Sales SKU: COM BST25216
Qty:   - OR - Add to Wish List

The BST 25-216 is a professional quality, auxiliary base station transmitter designed to operate with the PR-216 and PR-216 Option 7 synthesized receivers in the 216-217 MHz band.

The BST 25-216 transmitter incorporates the latest digital and analog technologies to produce low residual noise, wide dynamic range, and extended frequency response, rendering the most natural sound possible from a wireless system.  This transmitter may be used for wireless remote audio monitoring, personal cueing, tour guide, language interpretation, and assistive listening applications.

Unique COMTEK features of the BST 25-216 include:

• 57 user-selectable channels in the 216-217 MHz range: 38 standard narrow-band, non-companded channels; 19
   high-fidelity narrow-band channels with companded audio processing.
• Single-window, bright LED display for exact frequency and channel, VU bar graph meter, antenna condition and
   lock-out indicator.
• Test tone generator for receiver testing and audio level referencing.
• Balanced mic or line level with 60 dB of control range to accommodate any audio level.
• Micro controller automatically sets the modulation deviation, the audio mode for companding processing, and the EQ
   when corresponding channels are selected.
• Can be rack mounted for AC or 12-volt DC power and can accommodate a variety of remote antennas.

Audio Inputs

Mic: XLR 600 ohm Balanced -40 dBV (nominal)
Line: XLR > 10k ohm Balanced 0 dBV (nominal)


• Telescopic antenna mounts directly into top of transmitter

• BNC RF output connector for optional external antenna

RF Output Power

Set for 100 mW

Operation Indicators

• LED Bargraph VU Meter displays audio input
• Two-Digit Alpha Numeric Display shows operating
• Five-Digit Numeric Display shows operation
• Antenna Indicator displays deficient antenna
• Lock-out Indicator shows tuning has been disabled

Power Compliance

12 Volts DC, 300 mA max

Frequency Response

80 Hz to 8 kHz

Audio Distortion

Less than 1% at 80% modulation

Modulation Limiter

Soft compressor type w/ high (25 dB) linear overload protection; attack time less than 1ms; recover time 10 ms

Audio Gain Control

Greater than 40 dB

Test Tone Generator

400 Hz 0.05% distortion

Frequency Modulation

5 kH and 10 kH deviation

Frequency Stability

Better than 20 ppm; digitally synthesized; crystal controlled

Operating Frequency

216-217 MHz

Harmonic and Spurious Emissions

Better than 55 dB below carrier


6 1/2" W x 1 3/4" H x 5 5/8" D


44 oz

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