• Country
• United States of America (USA)

• Manufacturer / Brand
• Tech-Master Products Co.; Brooklyn (NY)

• Year
• 1958 ?

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 323192

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

• Number of Tubes
• 6

• Valves / Tubes
• 12AX7 12AX7 6AN8 6L6GB 6L6GB 5V4GA

• Main principle
• Audio-Amplification

• Wave bands
• - without

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

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

• Material
• Metal case

• from Radiomuseum.org
• Model: 21 - Tech-Master Products Co.;

• Shape
• Book-shelf unit.

• Notes

• Tech-Master model 21 is an AC operated audio amplifier.

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Set 391 Folder 14 dated 3-58)

• Author
• Model page created by Dirk Taekels. See "Data change" for further contributors.

• Other Models

• Here you find 27 models, 23 with images and 12 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Tech-Master Products Co.; Brooklyn (NY)