• Country
• United States of America (USA)

• Manufacturer / Brand
• Minerva Radio Co.(post WW2); New York (NY)

• Year
• 1946

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 47341

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

• Number of Tubes
• 8

• Valves / Tubes
• 6SK7 6SA7 6SK7 6SQ7 6SC7GT 25L6GT 25L6GT 25Z6

• Main principle
• Superhet with RF-stage; ZF/IF 455 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

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

• Power type and voltage
• AC/DC-set / 117 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Material
• Metal case

• from Radiomuseum.org
• Model: Tropic Master W117 early [25L6; 25Z6] - Minerva Radio Co.post WW2; New

• Shape
• Miscellaneous shapes - described under notes.

• Dimensions (WHD)
• 14 x 8 x 8.5 inch / 356 x 203 x 216 mm

• Notes
• "Portable" for mains only! This variant employs two 25L6 with filaments in series instead of two 50L6 in parallel. Both configurations add result in 50 Volts and 300 Milliamps. But in case of a broken filament the other power tube is safe, while in the parallel connection the other tube will almost immediately burn out too.

• External source of data
• Ernst Erb

• Source of data
• Collector's Guide to Antique Radios 4. Edition

• Mentioned in
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Literature/Schematics (1)
• Rider's Perpetual, Volume 15 = 1947 and before (Schematic is correct but the power tube types)

• Other Models

• Here you find 25 models, 21 with images and 20 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Minerva Radio Co.(post WW2); New York (NY)