Liniplex  HF Receiver F1

Phase Track Ltd., Reading

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  • Year
  • 1983–1988 ?
  • Category
  • Commercial Receiver (may include amateur bands)
  • Radiomuseum.org ID
  • 370201

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • Superhet, double/triple conversion
  • Wave bands
  • Short Wave (SW only)
  • Power type and voltage
  • Batteries / addl. power jack / 50-60 Hz, 90-265 V; DC: Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Liniplex  HF Receiver F1 - Phase Track Ltd., Reading
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 193 x 63 x 203 mm / 7.6 x 2.5 x 8 inch
  • Notes

  • The Liniplex F1 was introduced by Phase Track Ltd. in 1983 as a compact, fixed‑frequency HF broadcast receiver for professional rebroadcast and monitoring applications. It was designed primarily for BBC World Service and other international shortwave program relays, using crystal‑controlled channels to ensure exceptional frequency stability and low phase noise.

    The receiver employed double‑conversion superheterodyne circuitry and a patented synchronous demodulation system marketed as “fly‑wheel tuning.” This design maintained carrier lock during deep signal fades, producing cleaner, distortion‑free audio compared with conventional AM or SSB receivers.

    Production continued until 1988, after which the improved Liniplex F2 replaced it. The Liniplex F1 was supplied with nine crystals for BBC frequencies and was housed in a sturdy cast‑aluminium case.

    Technical Specifications

    • Coverage: Fixed within 2 – 26.5 MHz (crystal‑controlled, 9 channels)
    • Modes: AM (LSB/USB ECSS) – Exalted‑Carrier Single Sideband (Synchronous Demodulation)
    • Selectivity: 4 kHz @ –6 dB
    • Sensitivity: < 1.5 µV @ –10 dB S/N SSB
    • Audio Output: 0.25 W @ 1 % distortion
    • IF Frequencies: 35.4 MHz and 455 kHz
    • Spurious Response: < –60 dB
    • AM Passband: 50 – 3400 Hz (–3 dB)
    • Antenna Input: 300 / 1500 Ω
    • Power Supply: 120 / 240 VAC 50–60 Hz or Ni‑Cad battery
    • Accessories: Line Output Option
    • Variants: Model F1‑2 – 19″ rack‑mounted dual‑receiver configuration
  • Net weight (2.2 lb = 1 kg)
  • 1.850 kg / 4 lb 1.2 oz (4.075 lb)
  • Mentioned in
  • -- Original prospect or advert (Radio Database International, 1983, p.233)
  • Literature/Schematics (1)
  • -- Original prospect or advert (Popular Communications Aug 1986. pp.38,39)
  • Author
  • Model page created by Gary Cowans. See "Data change" for further contributors.

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