Receivers

Telonics TR-8 Handheld Scanning Receiver ²⁵

$ 1,516.25 USD

Key Features

• Wideband coverage (138 – 235 MHz) with narrowband sensitivity
• Stores over 2000 scannable frequencies, custom labeled and organized in up to 25 independent lists
• Full 177dB gain control lets you completely turn down the gain for high signal levels - ideal for recovering transmitters
• Automatic signal detection includes a signal-strength meter, digital pulse-strength indication, and pulse-rate measurement
• Internal Li-Ion battery provides 15-hour operational life (typ)
• Easily programmable, with or without a PC

Comparing TR-8 with Others

	TR-8	R-1000	R-5000
Wideband Coverage	138 – 235 MHz	148 - 174 MHz or 216-222 MHz	148 - 174 MHz or 216-222 MHz
Store of Scannable Frequencies	2000	999	999
Gain Control	177 dB	Variable up to 80 dB	140 dB
Frequency Resolution	100 Hz	100 Hz	100 Hz
Weight w/o Antenna	285 g (w/ batteries)	352 g (w/ batteries)	528 g (w/ batteries)

• Specifications
• In the Box
• Required Items
• Optional Items
• Documents

• • Characteristics
    General	Synthesized direct-conversion receiver
    Frequency Coverage	138 to 235 MHz continuous coverage
    Frequency Selection	Direct entry via keypad or rotary knob
    Frequency Resolution	100Hz
    Center Frequency Accuracy	±1ppm at 20°C
    Frequency Stability	±2ppm from -20 to +70°C (referenced to frequency at 20°C)
    Long Term Frequency Drift	(after one-minute stabilization) ±100Hz
    Audio bandwidth (-3dB)	Three user-selectable ranges: [500-1300Hz] [350-1800Hz] [800-1600Hz]
    Acceptable Modes of Operation	pulse amplitude modulation (PAM), pulse period modulation (PPM), continuous wave (CW), and single side band (SSB)
    Pulse Detection and Notification	Minimum pulse width: 10 milliseconds Minimum pulse rate: 12 beats per minute
    Low Battery Indication	Battery Gauge on Display
    Power Supply	Internal: 4.2V/3300mAh rechargeable Li-Ion cell External (battery charger input): 5V via USB-C port
    Typical Operating Lifetime (@ 20°C)	15 hours with automatic LCD backlight usage 12 hours with LCD backlight 'locked on' (medium level)
    RF Input Impedance	50 ohms
    Noise Figure	4 dB typ with 50Ω Source Impedance
    Sensitivity for 10 dB S+N+D/N	Better than -130 dBm typical (500-1300 Hz audio bandwidth setting)
    Typical Minimum Discernible Input Level	-150 dBm (0.007 microvolt)
    Opposite Sideband Suppression	40 dB typ
    Audio Gain Control Range	18 dB typ
    RF gain control range	177 dB typ
    Total Gain Control range	195 dB typ
    Audio Output Impedance	16Ω (headphone jack)
    Internal Speaker Cut Out	Internal speaker is muted when plug is inserted in headphone jack
    Audio Output Jack	1/8 inch (3.5mm) stereo or monaural phone plug
    Programming / Charging Connector	USB-C port
    RF Input Connector	BNC jack
    Display	3 x 5 cm 128 x 64 pixel LCD display with auto-dimming backlight
    Keypad	Backlit silicone keypad with 3 multi-function 'soft' keys
    Gain Control	Rotary encoder with pushbutton controls both RF gain and audio volume
    Tune Control	Rotary encoder with pushbutton adjusts frequency in 100 Hz steps and scrolls quickly through frequencies stored in scan memory
    Multipurpose LED	Front panel LED has multiple functions: With TR-8 off Red: battery charging Blue: battery fully charged With TR-8 on Red (pulsed): over-gain warning indicator Blue (pulsed): RF pulse detected
    Scan Memory	2,475 frequencies (organized in 25 lists with up to 99 frequencies each)
    Programming	Frequency lists and labels may be modified: 1. Via PC application connected via USB 2. Directly on the TR-8 with user-friendly interface
    Operating Temperature Range	-20 a +70 °C
    Dimensions	15.9 x 6.3 x 3.0 cm (6.3 x 2.5 x 1.2 in) [excluding knobs and connectors]
    Weight	285 g

• • Receiver
  • Manual
• • None
• • VHF Antenna
• • User Manual (English)
  • Getting Started Guide (English)

EO 20230629

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R-5000 Telemetry System - Discontinued

$ 1,465.95 USD

Rugged Metal Case designed for heavy field use. Mounted on a removable three element Yagi...

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Telonics TVR-1 Test Receiver for 145–170 MHz VHF Transmitters with Visual Indicator and Pulse Output

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Instantly Verify Your VHF Transmitters with the Telonics TVR-1 Test Receiver

Compact, reliable, and designed for short-range testing, the TVR-1 is the ideal tool to ensure your transmitters are working properly.

The Telonics TVR-1 Test Receiver is a portable, compact receiver designed to detect VHF transmitter signals in the 145–170 MHz range. This device is ideal for quickly verifying whether a transmitter is on and functioning, both in the field and in the lab. It provides both a visual and audio indication for each received transmission, along with a pulse output that can be connected to recorders or data acquisition systems. It operates on a standard 9V alkaline battery and is specifically designed for short distances of 2 to 3 feet.

Key Features:

• Accurate reception: Detects VHF transmissions between 145 and 170 MHz.
• Ultra-portable: Pocket-sized design, perfect for field use.
• Visual and audio indicators: Confirms each transmission with light and sound.
• Pulse output: Generates a 0 to 7 V signal for external logging.
• Simple operation: Only requires an On/Off switch and sensitivity selector.
• Recorder compatible: Connects to external systems via 1/8" jack.
• High thermal resistance: Operates in extreme environments from -40°C to +70°C.
• Rugged construction: Ideal for transmitter testing in lab or field conditions.

• Specifications
• In the Box
• Required Items
• Optional Items

• Specification	TVR-1 Test Receiver
  Frequency Range	145 – 170 MHz
  Indicator Type	Visual (LED) and Audio (buzzer)
  Pulse Output	0 to 7 V via 1/8” jack
  Power Supply	9V alkaline battery
  Battery Life	~1 month with new battery
  Operating Temperature	-40 °C to +70 °C
  Antenna Connector	BNC type (female)
  Recommended Use	Short-range testing (2–3 feet)

• • Telonics TVR-1 Test Receiver
  • Pre-installed 9V alkaline battery
  • User manual
• • External BNC antenna (sold separately)
  • Compatible VHF transmitter
• • Recorder or data acquisition system
  • Antennas of different sizes or frequencies
  • Carrying case

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Yagi Antenna 5 Elements Folding Portable and Split

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Maximize Signal Reception with High-Precision Folding and Split Yagi Antennas

Power, portability, and tracking accuracy with our 5-element directional antennas. Ideal for field research and wildlife monitoring using custom-frequency transmitters.

 

The 5-element folding and split Yagi antennas are designed to optimize signal reception and transmission within a specific directional range. Unlike omnidirectional antennas, these models offer higher directional gain, signal focus, and reduced interference, significantly improving field tracking performance. They can be custom-tuned to operate within the 148 to 225 kHz frequency range, depending on the transmitter used. The 5-element version is also available in a “split” option, ideal for compact storage and reduced shipping costs.

Features

• Superior directional gain: Perfect for locating specific signals in open fields or high-interference areas.
• Split version available: Designed for compact storage and easier international shipping, lowering logistics costs.
• Folding and portable: Built for hassle-free field use; quick to assemble and disassemble.
• Frequency-tuned: Customized to operate between 148–225 kHz, ensuring optimal performance.
• Lightweight and rugged build: Durable materials designed to withstand continuous use in demanding outdoor conditions.

• Specifications
• In the Box
• Required Items

• Model	Features
  5-Element Folding	Greater precision and sensitivity. Requires more deployment space.
  5-Element Folding “Split”	Split version, ideal for compact transport and reduced shipping costs.
  Frequency Range	148 – 225 kHz (tuned to the user’s transmitter)

• • 5-element folding Yagi antenna (as selected)
  • Basic assembly manual
• • Receiver compatible with frequencies between 148 and 225 kHz
  • Transmitters tuned to the same frequency

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TRX-3S Receiver 3 Channels

$ 390.00 USD

Power and Precision in One Device

With the TRX-3S receiver, take tracking and detection to the next level. This compact 3-channel receiver offers versatility and precision in any situation, whether using disposable batteries or a rechargeable pack. Choose your ideal configuration and stay in control at all times.

The TRX-3S receiver is an essential tool for professionals who require reliability and precision. Available with 8 disposable AAA batteries or a rechargeable 8-cell pack, this receiver adapts to your specific power needs. Customize it further with antenna mounting options, from a rubber grip or pistol grip to standalone use. Includes carrying case, charger, and external power adapter, depending on the model. Designed to operate in frequencies from 148-225 MHz, the TRX-3S ensures you always have a strong and clear connection.

Key Features:

• Flexible Battery Configuration: Use 8 disposable AAA batteries or a rechargeable 8-cell pack for added convenience.
• Customizable Grip Options: Choose between rubber grip, pistol grip mounting, or a standalone design based on your preferences.
• Includes Essential Accessories: Comes with a carrying case, battery charger, and external power adapter depending on the selected model.
• Lightweight and Compact: Weighs 425 grams and measures 17.8 × 7.6 × 2.5 cm, ideal for carrying anywhere.
• Wide Frequency Range: Operable in frequencies from 148-225 MHz to suit various tracking applications.

• Specifications
• In the Box
• Required Items
• Optional Items
• Documents

• Engineering Specifications
  Noise Figure:	2.8 dB typical
  Input Impedance:	50 ohms
  Frequency Range:	3 channels 10 KHz wide, spaced 40 KHz apart, in the 148-222 MHz frequency range
  Frequency Stability:	+/- 2 KHz from -20 to +120 degrees F or better
  Image and Spurious Rejection:	45 dB or better
  Minimum Discernible Signal:	-148 dBm (0.01 microvolts) or better
  Circuit Design:	Superheterodyne conversion with 2-pole 22.4 KHz crystal filter (6 dB down, passband)
  Manual Gain Control Range:	70 dB
  Tuning:	Channels spaced 10 KHz apart, tuned by quartz-locked digital synthesizer. Fine VCXO tuning +/- 5 KHz
  Sweep:	Not applicable
  Frequency Restability:	+/- 2 KHz or better
  Signal Measurement:	0-1 scale, minimum signal to activate: 140 dBm, dynamic range of 30 dB
  Noise Suppression Circuit:	Not applicable
  Operating Voltage:	9-14 volts DC
  Battery Pack:	8 disposable AAA batteries or optional internal nickel-cadmium rechargeable battery

  • TRX-3S Multi-Channel Receiver
  • Manual
  • AAA Disposable or Rechargeable Batteries
  • Optional Antenna Yagi 3 Elements
  • None
  • AAA Batteries
  • Technical Specifications (English)

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