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Radio Design Labs ST-VOX1



Audio Control, Vox Relay

$147.92 $197.22
You save $49.30

The ST-VOX1 is an Audio Controlled Relay in the STICK-ON® series. When used in intercom or talkback applications, the ST-VOX1 may be triggered directly from an unbalanced microphone. In many such installations the microphone or other audio source must be preamplified, making the ST-VOX1 an ideal mate to work with the STM-1 preamp. The unbalanced output from the STM-1 can be used to trigger the ST-VOX1, while the STM-1 balanced output is used for the audio feed.

PS24AS power supply sold separately.

$147.92 $197.22
You save $49.30

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  • Main Features:
  • Switching Controlled by Voice Signal • Switching from Mic or Line Level Signals • Precise Threshold Adjustment • DPDT Switching Contacts • Open-Collector SLAVE Output
  • Specifications:
  • Mic Input:5 kΩ unbalanced line
  • Line Input:200 kΩ unbalanced
  • Control Outputs:Open-Collector @ 25 mA, suitable to drive indicators or Slave LCR
  • Relay Contacts:Double-pole-double-throw
  • Max. Switching Power:60 W, (220 Vdc, 125 Vac, 2A)
  • Mic Input Sensitivity:Adjustable -75 dBu to -25 dBu
  • Line Input Sensitivity:Adjustable -45 dBu to -15 dBu
  • Indicators:Audio threshold LED (for setting sensitivity)
  • Retrigger Delay:50 ms
  • Release Delay Time Adjustment Range:Relay Contacts: 70 to 260 ms
  • Slave open-collector output: 15 to 260 ms
  • Activation Response TimeRelay Contacts: 5 ms
  • Slave open-collector output: 3 ms
  • Power Requirement:GROUND-REFERENCED 24 Vdc @ 50 mA * * Assumes 20 mA max load at SLAVE output
  • Ambient Operating Environment:0° C to 55° C