• Country
• United States of America (USA)

• Manufacturer / Brand
• Grommes Precision Electronics, Inc.; Chicago (IL)

• Year
• 1960 ??

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 337107

• Number of Tubes
• 5

• Valves / Tubes
• 6EU7 6EU7 6BQ5 6BQ5 6V4

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 117 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Power out
• 20 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: Amplifier S20 - Grommes Precision Electronics,

• Shape
• Rack

• Dimensions (WHD)
• 15.25 x 6.5 x 9.875 inch / 387 x 165 x 251 mm

• Notes

• PA amplifier with 4 inputs: 2x Mic + Phono + Aux.

• Net weight (2.2 lb = 1 kg)
• 20 lb (20 lb 0 oz) / 9.080 kg

• Author
• Model page created by Gottfried Silberhorn. See "Data change" for further contributors.

• Other Models

• Here you find 73 models, 66 with images and 49 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Grommes Precision Electronics, Inc.; Chicago (IL)