RTTY/CW Computer Interface MFJ-1224

MFJ Enterprises; Starkville (MS)

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  • Year
  • 1970 ??
  • Category
  • Pre-stage (adaptor for SW/FM/VHF/UHF incl. built-in), Frequency converter
  • Radiomuseum.org ID
  • 202903

 Technical Specifications

  • Number of Transistors
  • 8
  • Semiconductors
  • Main principle
  • PLL, Phase-locked loop
  • Wave bands
  • Wave Bands given in the notes.
  • Power type and voltage
  • Dry Batteries / 12 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: RTTY/CW Computer Interface MFJ-1224 - MFJ Enterprises; Starkville MS
  • Shape
  • Miscellaneous shapes - described under notes.
  • Dimensions (WHD)
  • 8.5 x 1.75 x 6 inch / 216 x 44 x 152 mm
  • Notes
  • Controls: ON/OFF; RTTY/CW; offset freq: 170, 425 & 850, 850; NORM/REV. LEDs: PWR, PHASE LOCK, DATA, CW XMIT. Connections: LOOP OUT [current loop]; DIRECT [KEYING] to xmitter w/solid state finals; GRID BLOCK [KEYING] to xmitter w/grid block; KEY IN input keying; DEMOD OUT TTL level RTTY/CW; K-Connector: DEMOD [out], GND, CW KEY computer to xmit key, RTTY, CW ID; General: RTTY [DEMOD] TTL level RTTY out, CW [DEMOD], GND, CW ID, RTTY in, PTT to xmit, CW KEY in, +5V; MIC: PTT, PTT GND, ASFK SHIELD, AFSK out, FSK out; AUDIO IN; SPEAKER OUT;

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