• Country
• United States of America (USA)

• Manufacturer / Brand
• Graymark Educational Products, Inc. Los Angeles, CA

• Year
• 1960 ??

• Category
• Kit (Parts plus instruction) or building instructions only

• Radiomuseum.org ID
• 212496

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

• Number of Tubes
• 3

• Valves / Tubes
• 12AT7 50C5 35W4

• Main principle
• TRF with regeneration; 2 AF stage(s)

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Broadcast and Short Wave (SW).

• Power type and voltage
• AC/DC-set / 110 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 3 inch = 7.6 cm

• Material
• Metal case

• from Radiomuseum.org
• Model: 511 All Band Radio educational kit - Graymark Educational Products,

• Shape
• Chassis only or for «building in»

• Dimensions (WHD)
• 8.625 x 4.875 x 4.25 inch / 219 x 124 x 108 mm

• Notes
• Plug-in coils. 4 plug-in coils cover the MF and HF range of approximately 500 kHz to 30 MHz.

• Net weight (2.2 lb = 1 kg)
• 1 kg / 2 lb 3.2 oz (2.203 lb)

• Price in first year of sale
• 23.00 $

• Literature/Schematics (1)
• -- Schematic

• Author
• Model page created by Arpad Roth † 27.3.17. See "Data change" for further contributors.

• Other Models

• Here you find 6 models, 6 with images and 3 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Graymark Educational Products, Inc. Los Angeles, CA