• Country
• United States of America (USA)

• Manufacturer / Brand
• National Company; Cambridge & Malden (MA)

• Year
• 1939

• Category
• Power supply/conditioner or battery or charger 

• Radiomuseum.org ID
• 49543

• • alternative name: National Toy Co.
  • Brand: Thrillbox

• Number of Tubes
• 1

• Valves / Tubes
• 6X5

• Wave bands
• - without

• Details
• Power Supply (not only Batt.El.)

• Power type and voltage
• Storage Battery for all (e.g. for car radios and amateur radios) / 6 Volt

• Loudspeaker
• - - No sound reproduction output.

• from Radiomuseum.org
• Model: 686 - National Company; Cambridge &

• Notes
• vibrator pack for 6V DC, uses mallory 626 vibrator and 6X5 (alt: 0Z4) rectifier;
  output power 165V DC (B+ voltage), 45 mA
  used to power HRO / HRO-5 series receivers

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 14 = 1944 = before 1943

• Mentioned in
• Rider's page 14-35, 36

• Other Models

• Here you find 445 models, 284 with images and 189 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from National Company; Cambridge & Malden (MA)