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Telex

Telex RadioCom BTR 300 Single Channel VHF Wireless Intercom Base Station

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The Telex BTR-300 is a VHF wireless intercom Base Station, featuring simultaneous, full-duplex support of up to 4 remote stations and 16 beltpack transceivers, and features a 2000' (beltpack to beltpack) operating range. The higher VHF frequency allocation and advanced front-end RF filtering have been acquired and designed to avoid DTV operating bands and minimize localized RF interference on location.

View Product Features

  • Flexible, full-duplex VHF wireless intercom Base Station with simultaneous communications support of up to 4 portable and wired stations and 16 beltpack transceivers
  • Frequency allocation designed to avoid DTV band allocations, greatly reduce interference with improved "high-Q" front-end RF filtering and unique channel assignments
  • Computerized frequency selection for maximized precision, consistent operability
  • Rugged, shielded all-metal casing, table top or rackmount use
  • Intercom loop-thru connectors with existing external wired intercom stations, External
  • Intercom switch with dedicated level trim and LED indicator
  • Auxiliary audio connectors to PA systems, recording devices and 4-wire intercoms;
  • Auxiliary Enable switch with dedicated level control and LED indicator
  • Telex or RTS Headset connectors with dedicated headset volume control
  • Adjustable headset microphone trim control with gain compressor for overload
  • protection, dedicated gain light indicator
  • Local external speaker out jack with volume trim control
  • Headset mic selector switch for electret or dynamic microphone use, separate Mic
  • Push-To- or Lock-To-Talk local headset microphone enabler switch
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About the Telex RadioCom BTR 300 Single Channel VHF Wireless Intercom Base Station

The Telex RadioCom BTR 300 is a single-channel VHF wireless intercom base station designed to integrate a standard two-way VHF radio system into a professional wired intercom matrix, such as an RTS party-line system. It functions as a dedicated bridge, enabling full-duplex communication between personnel using the wired intercom network—typically located in a control room, broadcast truck, or fixed production area—and field staff utilizing VHF handheld or mobile radios. Operating on a licensed VHF frequency, this base station receives the half-duplex radio transmissions and converts them into a continuous audio stream on a dedicated matrix port, while simultaneously taking audio from a designated intercom channel and transmitting it over the radio when activated. This bidirectional link is essential for coordinating events like live sports broadcasts, large-scale outdoor productions, and news operations where key team members are dispersed across a wide area.

The unit is engineered for reliability in professional RF environments, featuring robust transceiver circuitry with adjustable RF power output and sophisticated squelch controls, including CTCSS (Continuous Tone-Coded Squelch System) and DCS (Digital-Coded Squelch), to minimize interference and ensure that only intended communications are passed to the intercom. Audio processing is tailored for clarity, incorporating compression, limiting, and noise reduction to optimize the voice signal from the often noisy and variable RF environment for the clean intercom path, and vice-versa. The base station typically offers multiple interfacing options, allowing it to connect directly to an intercom matrix via a multi-pin connector (like a DB-25 for RTS systems) or to a standard 4-wire audio plus PTT interface for broader compatibility.

Housed in a 1U rack-mountable chassis, the BTR 300 is built for permanent installation in equipment racks. Configuration of its operating frequency, squelch settings, and audio levels is performed via front-panel controls or dedicated software, with parameters stored in non-volatile memory. It connects to the intercom system via a data/power cable and to external VHF antennas via BNC connectors, with recommendations for high-gain, properly tuned antennas to maximize range and performance. By creating a transparent and reliable interface between radio and intercom technologies, the Telex RadioCom BTR 300 effectively extends the reach of the production communication network, ensuring seamless coordination between all team members regardless of their chosen communication device.

Key Features

  • Flexible, full-duplex VHF wireless intercom Base Station with simultaneous communications support of up to 4 portable and wired stations and 16 beltpack transceivers
  • Frequency allocation designed to avoid DTV band allocations, greatly reduce interference with improved "high-Q" front-end RF filtering and unique channel assignments
  • Computerized frequency selection for maximized precision, consistent operability
  • Rugged, shielded all-metal casing, table top or rackmount use
  • Intercom loop-thru connectors with existing external wired intercom stations, External
  • Intercom switch with dedicated level trim and LED indicator
  • Auxiliary audio connectors to PA systems, recording devices and 4-wire intercoms;
  • Auxiliary Enable switch with dedicated level control and LED indicator
  • Telex or RTS Headset connectors with dedicated headset volume control
  • Adjustable headset microphone trim control with gain compressor for overload
  • protection, dedicated gain light indicator
  • Local external speaker out jack with volume trim control
  • Headset mic selector switch for electret or dynamic microphone use, separate Mic
  • Push-To- or Lock-To-Talk local headset microphone enabler switch

Telex RadioCom BTR 300 Single Channel VHF Wireless Intercom Base Station Specs

RF Specifications
Frequency Range
VHF Band (e.g., 150-174 MHz or 216-250 MHz)
Channel Operation
Single channel, simplex
RF Output Power
Adjustable, 1-10 Watts
Modulation
16K0F3E (Narrowband FM)
Squelch
Carrier, CTCSS (67-250.3 Hz), DCS
Audio & Interfacing
Audio Bandwidth
300 Hz - 3 kHz typical
Interface to Intercom
Balanced +4 dBu, or RTS DB-25
PTT Control
Contact closure or logic level
Intercom Connection
Programmable as a matrix port
Electrical & Physical
Power Requirement
100-240V AC, 50/60 Hz
Current Consumption
0.5 A @ 12V DC or from matrix
Rack Units
1U
Dimensions
19" W x 12" D x 1.75" H
Weight
5 lbs (2.27 kg)
Control & Configuration
Configuration
Front-panel menu or PC software
Status Indicators
LEDs for Power, Rx, Tx, PTT, Squelch
Memory
Non-volatile for frequency and settings
Compatibility
RTS, other two-wire party-line systems
Antenna & Compliance
Antenna Connector
BNC, 50 Ohm
Impedance
50 Ohms
Operating Temperature
0°C to 50°C
Compliance
FCC Part 90, CE, other regional

Key Features

  • Flexible, full-duplex VHF wireless intercom Base Station with simultaneous communications support of up to 4 portable and wired stations and 16 beltpack transceivers
  • Frequency allocation designed to avoid DTV band allocations, greatly reduce interference with improved "high-Q" front-end RF filtering and unique channel assignments
  • Computerized frequency selection for maximized precision, consistent operability
  • Rugged, shielded all-metal casing, table top or rackmount use
  • Intercom loop-thru connectors with existing external wired intercom stations, External
  • Intercom switch with dedicated level trim and LED indicator
  • Auxiliary audio connectors to PA systems, recording devices and 4-wire intercoms;
  • Auxiliary Enable switch with dedicated level control and LED indicator
  • Telex or RTS Headset connectors with dedicated headset volume control
  • Adjustable headset microphone trim control with gain compressor for overload
  • protection, dedicated gain light indicator
  • Local external speaker out jack with volume trim control
  • Headset mic selector switch for electret or dynamic microphone use, separate Mic
  • Push-To- or Lock-To-Talk local headset microphone enabler switch
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