• Country
• United States of America (USA)

• Manufacturer / Brand
• Ehrhorn Technological Operations Inc.; Colorado Springs, CO

• Year
• 1972

• Category
• RF (Radio Frequency-) Amplifier

• Radiomuseum.org ID
• 278883

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

• Number of Tubes
• 1

• Valves / Tubes
• 8877

• Number of Transistors
• 5

• Semiconductors
• 2N5184 2N5184 2N5321 40841 40841

• Wave bands
• Short Wave (SW only)

• Power type and voltage
• Alternating Current supply (AC) / 220 - 240 Volt

• Material
• Metal case

• from Radiomuseum.org
• Model: Alpha 77 [PA-77] - Ehrhorn Technological

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 17 x 9.5 x 18 inch / 432 x 241 x 457 mm

• Notes

• Frequency  Coverage :   3  to  30  MHz  continuous  in  six  ranges.
  Plate   Power  Input:   3 KW  PEP  in  continuous  voice  duty,   SSB;   1.4  KW carrier  continuous   (FSK,   SSTV,  etc.);   2.5 KW keyed-carrier  CW or equivalent,  50% duty  cycle  key  down.

• Net weight (2.2 lb = 1 kg)
• 70 lb 0 oz (70 lb) / 31.780 kg

• Author
• Model page created by Jean-Luc Potart. See "Data change" for further contributors.

• Other Models

• Here you find 9 models, 9 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Ehrhorn Technological Operations Inc.; Colorado Springs, CO