Radio Design Labs TS-1D
Transient Suppressor


Radio Design Labs' TS-1D is a transient suppression module which shunts high energy, high frequency signals to system ground while passing, unaffected...
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Radio Design Labs TS-1D
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Radio Design Labs' TS-1D is a transient suppression module which shunts high energy, high frequency signals to system ground while passing, unaffected, full spectrum audio signals. The TS-1D incorporates the latest in surface mount, all solid state (no gas tube), technology to bring you an effective and economical solution for dealing with transients.

The TS-1D is intended to protect audio input and output circuits from the effects of transients induced on the audio lines. Single or multiple TS-1Ds are typically mounted to good earth ground at the location that audio lines enter or exit an equipment rack. This protects wiring inside the rack against the effects of induced electrostatic discharge (ESD), transients, and RF interference. The TS-1D integrates classical inductance, capacitance and resistance (LCR) filter techniques with high-speed solid-state switching to suppress frequency (time) related interference signals. These are configured to form a brick wall to signals above 1 MHz (250 ns rise time). A transient voltage above the nominal operating level of 40 Vp will cause the circuit switch to close, shunting the transient current to ground while the transient power is dissipated harmlessly by high voltage resistors. The switching time is about 450 ps.

The TS-1D contains four independent circuits. It may be used to protect four single ended (unbalanced) lines or two balanced lines.

The TS-1D must be connected to a low impedance ground system to operate properly. A 1/4 inch (6.3 mm) ground bus with .144 inch (3.7 mm) holes is provided on the bottom of the TS-1D to facilitate mounting. Multiple unit installations can be accommodated by using our GB6 ground bar. The GB6 provides space for mounting six TS-1Ds and provides a low impedance path to your ground system.

The TS-1D suppresses signals specified by IEC1000-4-2 levels 1 through 3, electrostatic discharge immunity; IEC1000-4-3 levels 1 through 3, radiated radio frequency electromagnetic field immunity; and IEC1000-4-4 levels 1 through 4, electrical fast transient/burst immunity.

Audio Specifications:

  • Frequency Response: 10 Hz - 50 kHz (+/- 0.25 dB)
  • Insertion Loss:
        * less than 0.3 dB (into balanced bridging input)
        * less than 1.0 dB (into 150 ohm or 600 ohm balanced input)
        * 0.6 dB (600 ohm balanced source into 600 ohm load)

Electrical Specifications:

  • Number of circuits: 4, independent (for connection as 4 unbalanced or 2 balanced audio lines)
  • Equivalent series resistance, input to output: 20 ohm
  • Equivalent circuit: 300 kHz LP filter, 6 dB/octave, integral shunt high voltage switch
  • Maximum working signal: 30 Vp, 60 V p-p
  • HV switch clamp: 24 V actuation; 48 V maximum clamp
  • Transient energy: 0.1 joule

Physical Specifications:

  • Case material: Electromagnetically inert plastic composition
  • Dimensions (W x L x H): 1.75" x 2.50" x 0.90" (4.45 x 6.35 x 2.29 cm)
  • Ground bus (integral): 110 alloy copper, 0.25 in. Wide x 1.6 in. Long with 2 mounting holes, #6 (3.7mm) clearance, mounting hardware included
  • Input/output signal termination: #6 (3.5mm) captive screw terminals

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