• Country
• United States of America (USA)

• Manufacturer / Brand
• Ampex; San Carlos, CA

• Year
• 1954

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 133172

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

• Number of Tubes
• 5

• Valves / Tubes
• 5879 12AU7 6V6GT 6V6GT 6AX5GT

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Details
• Loudspeaker + integr.Amplifier

• Power type and voltage
• Alternating Current supply (AC) / 60 cycles, 117V = 110 -120 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 8 inch = 20.3 cm

• Power out
• 10 W (unknown quality)

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: Portable Amplifier-Speaker 620 - Ampex; San Carlos, CA

• Shape
• Console with any shape - in general

• Dimensions (WHD)
• 13 x 16 x 8 inch / 330 x 406 x 203 mm

• Notes

• Companion of model 600 Portable Tape Recorder, this amplifier was also intended for conference rooms, offices or small auditorium. 60 to 10000Hz flat response.

• Net weight (2.2 lb = 1 kg)
• 11.2 kg / 24 lb 10.7 oz (24.67 lb)

• Price in first year of sale
• 150.00 $

• Source of data
• - - Manufacturers Literature

• Mentioned in
• Electronics - December, 1954

• Literature/Schematics (1)
• -- Schematic

• Literature/Schematics (2)
• Photofact Folder, Howard W. SAMS (Set 312 Folder 3 dated 4-56)

• Author
• Model page created by Emilio Ciardiello. See "Data change" for further contributors.

• Other Models

• Here you find 79 models, 72 with images and 19 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Ampex; San Carlos, CA