Alpha 77 DX PA77-DF, PA77-Dx,Alpha77 Sx

Ehrhorn Technological Operations Inc.; Colorado Springs, CO

  • Year
  • 1990
  • Category
  • RF (Radio Frequency-) Amplifier
  • Radiomuseum.org ID
  • 278885

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

 Technical Specifications

  • Number of Tubes
  • 1
  • Valves / Tubes
  • 8877
  • Number of Transistors
  • 16
  • Wave bands
  • Short Wave (SW only)
  • Power type and voltage
  • Alternating Current supply (AC) / 220 - 250 Volt
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Alpha 77 DX [PA77-DF, PA77-Dx,Alpha77 Sx] - Ehrhorn Technological
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 480 x 280 x 560 mm / 18.9 x 11 x 22 inch
  • Notes
  • Frequency Coverage : 1.8-2.0 and 3-24 MHz (24~30 MHz, PA-77Dx only)

    Plate Power Input : PA-77DF 2.5 KW PEP/SSB, 1 KW average d-c, all modes, no time .limit; PA-77Dx 3.5 KW PEP, 2 KW d-c average

    For export only, Model Alpha  77Sx (PA-77Sx): Same as ALPHA 77Dx (PA-77Dx) above except two 8877 tubes permit greater PEP input and output power. Approximately 175 watts drive for maximum output.

    Cooling« Full-cabinet ducted forced airi ball bearing centrif. blower

  • Net weight (2.2 lb = 1 kg)
  • 48 kg / 105 lb 11.6 oz (105.727 lb)
  • Author
  • Model page created by Jean-Luc Potart. See "Data change" for further contributors.

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