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Radio Design Labs ST-VOX1
Voice-Activated Relay

OUR PART #  STVOX-1

Our Price: $106.51
List Price: $142.48
You save 25%! (Low Price Guarantee)
Usually ships in 7-14 business days.
Need it sooner? Call us!

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Radio Design Labs' ST-VOX1 is an Audio Controlled Relay in the group of STICK-ON series products by Radio Design Labs. These products are designed for quick, convenient installation, and reliable operation in a variety of control applications. The ST-VOX1 is specifically designed to switch reliably on voice signals.

When used in intercom or talk back 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 RDL's 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.

The ST-VOX1 releases very quickly, but holds on through very short pauses in syllables common to speech. These time constants allow the design of a communications system yielding comfortable two-way conversation.

NOTE: Radio Design Labs' PS-24AS power supply is NOT included but is required in order to power this product.  Please see the "Accessories" tab or click here for more information on the PS-24AS power supply.

Features:

  • High-impedance inputs connect across any unbalancedaudio line
  • Multiturn sensitivity adjustment permits precisethreshold setting
  • Multiturn DELAY control adjusts relay release delay
  • Tight passband filtering yields triggering on voicefrequencies
  • SLAVE open-collectorterminal allows additional relays to be added for more contacts (RDL'sST-LCR1)
  • SLAVE terminal may be used with remote switch to manually overridethe control circuit and turn on the relay

Specifications:

  • Mic Input: 5 kohm unbalanced line
  • Line Input: 200 kohm unbalanced
  • Control Outputs: Open-collector @ 100 mA, suitable to drive indicators or slave LCR
  • Relay Contacts: Double-Pole-Double-Throw
  • Maximum switching power: 60 W, 125 VA
  • Maximum switching voltage: 220 Vdc, 250 Vac
  • Maximum switching current: 2 A
  • Maximum carrying current: 3 A
  • 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 level)
  • Retrigger Delay: approximately 50 ms
  • Release Delay Time Adjustment Range:
        * Relay Contacts: 70 to 260 milliseconds
        * SLAVE (open-collector output): 15 to 260 milliseconds
  • Activation Response Time:
        * Relay Contacts: 5 milliseconds
        * SLAVE (open-collect. output): 3 milliseconds
  • Power Requirement: 24 to 33 Vdc @ 50 mA, Ground-referenced
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24 VDC 500mA Switching Power Supply
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Mounting Strip for STICK-ON Units
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Mounting Kit for STICK-ON, TX, or Rack-Up module
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Click to download

Radio Design Labs ST-VOX1
Voice-Activated Relay

OUR PART #  STVOX-1

Product Information:

Radio Design Labs' ST-VOX1 is an Audio Controlled Relay in the group of STICK-ON series products by Radio Design Labs. These products are designed for quick, convenient installation, and reliable operation in a variety of control applications. The ST-VOX1 is specifically designed to switch reliably on voice signals.

When used in intercom or talk back 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 RDL's 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.

The ST-VOX1 releases very quickly, but holds on through very short pauses in syllables common to speech. These time constants allow the design of a communications system yielding comfortable two-way conversation.

NOTE: Radio Design Labs' PS-24AS power supply is NOT included but is required in order to power this product.  Please see the "Accessories" tab or click here for more information on the PS-24AS power supply.

Features:

  • High-impedance inputs connect across any unbalancedaudio line
  • Multiturn sensitivity adjustment permits precisethreshold setting
  • Multiturn DELAY control adjusts relay release delay
  • Tight passband filtering yields triggering on voicefrequencies
  • SLAVE open-collectorterminal allows additional relays to be added for more contacts (RDL'sST-LCR1)
  • SLAVE terminal may be used with remote switch to manually overridethe control circuit and turn on the relay

Specifications:

  • Mic Input: 5 kohm unbalanced line
  • Line Input: 200 kohm unbalanced
  • Control Outputs: Open-collector @ 100 mA, suitable to drive indicators or slave LCR
  • Relay Contacts: Double-Pole-Double-Throw
  • Maximum switching power: 60 W, 125 VA
  • Maximum switching voltage: 220 Vdc, 250 Vac
  • Maximum switching current: 2 A
  • Maximum carrying current: 3 A
  • 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 level)
  • Retrigger Delay: approximately 50 ms
  • Release Delay Time Adjustment Range:
        * Relay Contacts: 70 to 260 milliseconds
        * SLAVE (open-collector output): 15 to 260 milliseconds
  • Activation Response Time:
        * Relay Contacts: 5 milliseconds
        * SLAVE (open-collect. output): 3 milliseconds
  • Power Requirement: 24 to 33 Vdc @ 50 mA, Ground-referenced
Rackmount System for 12 Stick-On Units
Radio Design Labs STR-19A Rackmount System for 12 Stick-On Units
Radio Design Labs' STR-19A Racking System holds up to 12 STICK-ONs in a 19" rack and only occupies two rack spaces.
In Stock
136.70 182.87 25
In Stock
Free Shipping Available
Stick-On Mounting Rack for 10 Units
Radio Design Labs SR-10 Stick-On Mounting Rack for 10 Units
Radio Design Labs' STR-10 Racking System holds up to 10 STICK-ON units.  It holds STICK-ONs at an angle allowing for control adjustment from either the edge of a STICK-ON, or the top (depending on where the adjustment is located on ...
In Stock
65.41 87.48 25
In Stock
Free Shipping Available
24 VDC 500mA Switching Power Supply
Radio Design Labs PS-24AS 24 VDC 500mA Switching Power Supply
Radio Design Labs' PS-24AS is a 24 Vdc switching power supply with a North American AC plug.  500 mA, dc plug.Specifications: Input: 100 to 240 VACOutput: 24 Vdc, 500 mA (UL, CSA)Dimensions: 1.65" x 2.75" x 1.45" (4.2 x 7 x 3.7 ...
In Stock
23.40 31.28 25
In Stock
Din Rail Adaptor for STICK-ON
Radio Design Labs DRA-35S Din Rail Adaptor for STICK-ON
The DRA-35S is a 35 mm DIN rail mounting bracket that provides positive mounting for any RDL STICK-ON® module. The oblique mounting angle of the DRA-35S allows an installer to mount several STICK-ON modules to a single DIN rail. Access to ...
In Stock
19.40 22.89 15
In Stock
Rackmount Kit for 10 Stick-On Units
Radio Design Labs STR-19B Rackmount Kit for 10 Stick-On Units
Radio Design Labs' STR-19B Racking System holds up to 10 STICK-ON unitss in a 19 inch rack and only occupies two rack spaces. The STR-19B holds STICK-ONs at an angle allowing for control adjustment from either the edge of a STICK-ON, or ...
Usually ships in 7-14 business days.
Need it sooner? Call us!
162.53 217.40 25
Usually ships in 7-14 business days.
Need it sooner? Call us!
Free Shipping Available
Single RACK-UP Mounting Bay Utility Chassis
Radio Design Labs UC-1 Single RACK-UP Mounting Bay Utility Chassis
Radio Design Labs' UC-1 is an ULTRASTYLE design tabletop chassis for mounting RDL modules and accessories. The front panel features a single RACK-UP mounting bay. The rear panel has an identical mounting bay and is supplied with matching ...
Usually ships in 7-14 business days.
Need it sooner? Call us!
85.69 114.62 25
Usually ships in 7-14 business days.
Need it sooner? Call us!
Mounting Frame for Stick/TX
Radio Design Labs SR-4 Mounting Frame for Stick/TX
Radio Design Labs' SR-4 is a universal module chassis that can mount to a backboard, wall or nearly any other support. It provides mounting for 4 STICK-ON power amplifiers or 7 standard STICK-ON modules. TX ™ modules may also be mounted. ...
Usually ships in 7-14 business days.
Need it sooner? Call us!
84.88 113.53 25
Usually ships in 7-14 business days.
Need it sooner? Call us!
STICK-ON Series 19"W Mounting Rack for up to12 Modules
Radio Design Labs SR-12A STICK-ON Series 19"W Mounting Rack for up to12 Modules
Radio Design Labs' SR-12A chassis can be mounted in a rack or on a backboard to provide mounting of 12 STICK-ONs.
Usually ships in 7-14 business days.
Need it sooner? Call us!
65.41 87.48 25
Usually ships in 7-14 business days.
Need it sooner? Call us!
Mounting Strip for STICK-ON Units
Radio Design Labs Smk 12 Mounting Strip for STICK-ON Units
The SMK-12 allows removable surface (up to 6 units) or edge (typically 12, max. 16) mounting of STICK-ON units. They can be fastened to its surface using screws or adhesive foam pads.
Usually ships in 7-14 business days.
Need it sooner? Call us!
28.01 37.45 25
Usually ships in 7-14 business days.
Need it sooner? Call us!
Detachable Terminal Block
Radio Design Labs Dtb Rdl Detachable Terminal Block
Use DTB's to quickly detach and reattach wiring harness to STICK-ON units.
Usually ships in 7-14 business days.
Need it sooner? Call us!
6.92 8.16 15
Usually ships in 7-14 business days.
Need it sooner? Call us!
Kit to Mount ST, TX Series Modules on FP Panel
Radio Design Labs MB3-RDL Kit to Mount ST, TX Series Modules on FP Panel
TX or STICK-ON Module fastens to MB-3 which slides into FP-RRA/H track.
Usually ships in 7-14 business days.
Need it sooner? Call us!
5.11 6.83 25
Usually ships in 7-14 business days.
Need it sooner? Call us!
Mounting Kit for STICK-ON, TX, or Rack-Up module
Radio Design Labs MB1-RDL Mounting Kit for STICK-ON, TX, or Rack-Up module
Two mounting brackets mounts a STICK-ON, TX, or Rack-Up module to a flat surface.
Usually ships in 7-14 business days.
Need it sooner? Call us!
3.46 4.08 15
Usually ships in 7-14 business days.
Need it sooner? Call us!

Click to download

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