Clear-Com PTX-3
Wireless UHF IFB Base Station


Selected Model Price: $1,300.50
List Price: $1,445.00
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Clear-Com PTX-3
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The PTX-3 is a Wireless IFB (interruptible fold back) Intercom system from Clear-Com is a UHF wireless IFB Transmitter base station with 256 selectable frequencies at 100kHz increments. These systems are used for talent cueing as well as crew communications in Broadcast and motion picture production settings. In other cases, it can be used by directors and other management to monitor program audio during a production. Standalone or rack-mountable with the PRK-2 kit (sold separately). Non-RoHs

Clear-Com PTX-3 Specifications:

  • Operating frequencies (MHz):
    • Frequency Band D: 614.400 - 639.900
    • Frequency Band E: 640.000 - 665.500
    • Frequency Band F: 665.600 - 691.100
  • Frequencies Channels (per block): 256
  • Channel spacing: 100 kHz (0.1 MHz)
  • Spurious & Harmonic Suppression: 37 dBc above 1 GHz
  • Frequency Stability: ±.001% (10 ppm) @ 25º C
  • Temperature Stability: ±.001% (10 ppm) from -30º C to +50º C
  • Channel Selection: Momentary pushbutton switches, TUNE UP and Down
  • Compatibility Modes: IFB, Digital Hybrid Wireless; 400 Mode, 200 Mode, 100 Mode, Mode 3, Mode 6
  • Pilot Tone: 29.997 kHz IFB Mode, 32.765 kHz; 200 Mode, 400 Mode step selected, 32.768 kHz Mode 6
  • Modulation: FM, ±20 kHz deviation IFB & 100 Mode, ±75kHz 200 & 400 Mode, ±50kHz Mode 3 and Mode 6
  • Audio Frequency Response:
    • 100 Hz to 8 kHz, ±1 dB, IFB MODE system response (see Rolloff)
    • 30Hz to 20kHz ± 1dB, 200 & 400 MODE system response (see Rolloff)
  • Rolloff: Low frequency audio rolloff is Menu selectable for 3 dB down at 35 Hz or 50 Hz
  • Signal to Noise Ratio: 90 dB typical (“A” weighted)
  • RF Power Output: 250 mW (nominal)
  • Output Impedance: 50 Ohms
  • Audio Input Levels:
    • 0 dBu for Line, RTS1 &RTS2
    • -10 dBu for ClearCom
    • -42 dBu mic dry inputs, +/-50VDC max
  • Audio Input Config: Balanced and Unbalanced, rear panel selectable for Line, Mic, RTS 1, RTS 2, and ClearCom
  • Audio Input Impedance:
    • Greater than 2 K balanced
    • Greater than 1K unbalanced at any gain setting
  • Control Range: -18 dB to +24 dB (0 dB nominal center), software selectable
  • Audio Input Jack: Standard XLR female connector
  • Input Power: 12 to 14 VDC typical, 200 mA max; Max input range 6 to 18 VDC
  • Power Input Jack: Coax type, locking LZR RL26AE
  • Indicators: Backlit Liquid Crystal Display. Displays modulation meter, frequencies, modes, rolloff, audio level, and tuning groups
  • Front Panel Controls:
    • MENU momentary pushbutton switch
    • Power OFF-TUNE-XMIT, 3-position slideswitch
    • Select Up momentary pushbutton switch
    • Select Down momentary pushbutton switch
  • Rear Panel Controls: Input Mode Select, 4-section DIP switch
  • Weight: 9 oz.
  • Size: 5.25" long (including connectors) x 3.25" wide x 1.25" high
  • Emission designator: 180KF3E

Note: Actual operating performance may vary, and all information is subject to change without notice. This product is not approved for sale in Europe.

Note: The T4 IFB transmitter is FCC type accepted under Part 74:470-608MHz and 944.1 - 951.9 MHz.

Note: This device complies with FCC radiation exposure limits as set forth for an uncontrolled environment. This device should be installed and operated so that its antenna(s) are not co-located or operating in conjunction with any other antenna or transmitter. A separation distance of at least 20cm (8 inches) must be maintained to comply with the FCC Radio Frequency Maximum Permissible Exposure (MPE) requirements.

Consumer Alert

This particular wireless microphone device operates in portions of the 617-652 MHz or 663-698 MHz frequencies. Beginning in 2017, these frequencies are being transitioned by the Federal Communications Commission (FCC) to the 600 MHz service to meet increasing demand for wireless broadband services. Users of this device must cease operating on these frequencies no later than July 13, 2020. In addition, users of this device may be required to cease operations earlier than that date if their operations could cause harmful interference to a 600 MHz service licensee’s wireless operations on these frequencies. For more information, visit the FCC’s wireless microphone website at or call the FCC at 1- 888-CALL-FCC (TTY: 1-888-TELL-FCC).

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