• Country
• United States of America (USA)

• Manufacturer / Brand
• Royal - see also in text

• Year
• 1934 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 203614

• Number of Tubes
• 4

• Valves / Tubes
• 6D6 6C6 43 25Z5 185R4

• Number of Transistors

• Semiconductors
• 270R4

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown)

• Tuned circuits
• 2 AM circuit(s)

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

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

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 4 inch = 10.2 cm

• Power out
• 4 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Royal Royal? - Royal - see also in text

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Dimensions (WHD)
• 10 x 7 x 6 inch / 254 x 178 x 152 mm

• Notes
• In addition to the above four tubes this radio uses two glass ballast tubes. One 185R4 and one 270R4.

• Net weight (2.2 lb = 1 kg)
• 6 lb 12 oz (6.75 lb) / 3.065 kg

• Mentioned in
• Ballast-Tube Handbook; Jacobi 1985

• Other Models

• Here you find 6 models, 5 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Royal - see also in text