SG Short Wave Tuner with 71A
National Company; Cambridge & Malden (MA)
- Country
- United States of America (USA)
- Manufacturer / Brand
- National Company; Cambridge & Malden (MA)
- Year
- 1931 ??
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 49609
-
- alternative name: National Toy Co.
- Brand: Thrillbox
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 4
- Main principle
- TRF with regeneration
- Tuned circuits
- 2 AM circuit(s)
- Power type and voltage
- Other, details in remarks or not known. / 6 & 46,5 & 76,5 & 180 & -40,5 Batt & 110 AC Volt
- Loudspeaker
- - This model requires external speaker(s).
- from Radiomuseum.org
- Model: SG Short Wave Tuner with 71A - National Company; Cambridge &
- Notes
- All "B" supplies from batteries. "A" supply for the tubes 24 and 27 from AC mains, for the 71A from storage battery.
- External source of data
- Ernst Erb
- Circuit diagram reference
- Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
- Other Models
-
Here you find 446 models, 285 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)