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Radio Design Labs ST-VOX1
Voice-Activated Relay

OUR PART #  STVOX-1

Our Price: $104.43
List Price: $139.69
You save 25%! (Low Price Guarantee)
In Stock

Recommended Accessories

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
Stick-On Mounting Rack for 10 UnitsRadio 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

Free Shipping Available

Our Price:$64.12List Price: $85.76You save 25%!

24 VDC 500mA Switching Power SupplyRadio 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

Our Price:$22.92List Price: $30.67You save 25%!

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

Our Price:$19.02List Price: $22.44You save 15%!

Kit to Mount ST, TX Series Modules on FP PanelRadio 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.

In Stock

Our Price:$5.01List Price: $6.70You save 25%!

Mounting Kit for STICK-ON, TX, or Rack-Up moduleRadio 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.

In Stock

Our Price:$3.39List Price: $4.00You save 15%!

Rackmount Kit for 10 Stick-On UnitsRadio 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!

Free Shipping Available

Our Price:$159.34List Price: $213.14You save 25%!

Rackmount System for 12 Stick-On UnitsRadio 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.

Usually ships in 7-14 business days.
Need it sooner? Call us!

Free Shipping Available

Our Price:$134.02List Price: $179.28You save 25%!

Single RACK-UP Mounting Bay Utility ChassisRadio 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!

Our Price:$84.01List Price: $112.37You save 25%!

Mounting Frame for Stick/TXRadio 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!

Our Price:$83.21List Price: $111.30You save 25%!

STICK-ON Series 19"W Mounting Rack for up to12 ModulesRadio 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!

Our Price:$64.12List Price: $85.76You save 25%!

Mounting Strip for STICK-ON UnitsRadio 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!

Our Price:$27.45List Price: $36.72You save 25%!

Detachable Terminal BlockRadio 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!

Our Price:$6.77List Price: $8.00You save 15%!

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
Stick-On Mounting Rack for 10 UnitsRadio 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

Free Shipping Available

Our Price:$64.12List Price: $85.76You save 25%!

24 VDC 500mA Switching Power SupplyRadio 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

Our Price:$22.92List Price: $30.67You save 25%!

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

Our Price:$19.02List Price: $22.44You save 15%!

Kit to Mount ST, TX Series Modules on FP PanelRadio 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.

In Stock

Our Price:$5.01List Price: $6.70You save 25%!

Mounting Kit for STICK-ON, TX, or Rack-Up moduleRadio 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.

In Stock

Our Price:$3.39List Price: $4.00You save 15%!

Rackmount Kit for 10 Stick-On UnitsRadio 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!

Free Shipping Available

Our Price:$159.34List Price: $213.14You save 25%!

Rackmount System for 12 Stick-On UnitsRadio 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.

Usually ships in 7-14 business days.
Need it sooner? Call us!

Free Shipping Available

Our Price:$134.02List Price: $179.28You save 25%!

Single RACK-UP Mounting Bay Utility ChassisRadio 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!

Our Price:$84.01List Price: $112.37You save 25%!

Mounting Frame for Stick/TXRadio 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!

Our Price:$83.21List Price: $111.30You save 25%!

STICK-ON Series 19"W Mounting Rack for up to12 ModulesRadio 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!

Our Price:$64.12List Price: $85.76You save 25%!

Mounting Strip for STICK-ON UnitsRadio 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!

Our Price:$27.45List Price: $36.72You save 25%!

Detachable Terminal BlockRadio 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!

Our Price:$6.77List Price: $8.00You save 15%!

Click to download

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