• Country
• United States of America (USA)

• Manufacturer / Brand
• Sylvania (Hygrade, GTE, Nilco); Emporium (PA)

• Year
• 1951 ?

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 97603

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

• Number of Tubes
• 5

• Valves / Tubes
• 7N7 7N7 7Y4 5679 1247

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 105-125 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: 221Z Polymeter - Sylvania Hygrade, GTE, Nilco;

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 10.25 x 15 x 11.75 inch / 260 x 381 x 298 mm

• Notes
• VTVM for all AM, FM and TV, flat response 20 cps to 300 mc.

• Price in first year of sale
• 100.00 $

• Literature/Schematics (1)
• 1951 Newark catalog Nº 51

• Author
• Model page created by Vitor Oliveira. See "Data change" for further contributors.

• Other Models

• Here you find 1092 models, 455 with images and 958 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sylvania (Hygrade, GTE, Nilco); Emporium (PA)