UHF CB Transceiver TX4000

The Electrophone‑branded GME TX4000 is a 40‑channel UHF CB mobile transceiver designed and manufactured in Australia for the 476–477 MHz citizen band. It represents one of GME’s early advanced UHF platforms, notable for integrating multi‑channel Selcall and compatibility with the PG4000 pocket pager, enabling selective paging of remote users — a capability uncommon in consumer CB equipment of the period.

The TX4000 was built for demanding mobile environments, featuring a rugged metal chassis, front‑facing loudspeaker, and straightforward control layout suited to professional and recreational users alike. A remote‑mount variant, the TX4000R, provided installation flexibility for vehicles with limited dashboard space.
The model is historically significant as part of GME’s transition toward more feature‑rich UHF CB designs, bridging earlier basic units and the later TX4xxx/TX6xxx series that became industry standards.

Technical Specifications

General

• Type: Mobile UHF CB transceiver
• Application: Land mobile, 4WD, transport, commercial users
• Branding: Electrophone (GME)

Frequency / Channels

• Frequency range: 476–477 MHz
• Channels: 40 CB channels
• Mode: FM
• Synthesizer: PLL frequency‑synthesised

Transmitter

• RF output power: 5 W nominal
• Modulation: FM
• Selective calling: Integrated Selcall encoder/decoder
• Pager support: Compatible with PG4000 pocket pager (selective paging)

Receiver

• Superheterodyne
• Features: Scanning, Selcall mute, front‑facing loudspeaker

Controls & Indicators

• Rotary controls: Volume, Squelch
• Pushbuttons: Channel selection and function keys
• Display: 7‑segment numeric channel display (typical for the series)

Construction

• Chassis: Rugged metal body with die‑cast structural elements
• Cooling: Passive, via metal case
• Mounting:
  • TX4000: Standard mobile transceiver
  • TX4000R: Remote‑mounted transceiver with compact control head

Accessories

• PG4000 pocket pager (optional)
• Standard mobile mounting bracket
• External antenna (required)

Historical Notes

The TX4000 series marked a period when GME began integrating more sophisticated signalling and paging features into consumer CB equipment. Its Selcall and pager functions made it attractive to transport operators, rural users, and travellers needing selective alerting in remote areas. The platform also formed the basis for a commercial variant used in Telstra’s trunked radio system, demonstrating the design’s adaptability.

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