- Country
- United States of America (USA)
- Manufacturer / Brand
- Howard Radio Company; Chicago (IL)
- Year
- 1926
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 44752
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 7
- Main principle
- TRF without regeneration; 3 AF stage(s); Neutrodyne
- Tuned circuits
- 4 AM circuit(s)
- Wave bands
- Broadcast only (MW).
- Power type and voltage
- Storage and/or dry batteries / 6 & 40 & 90 & 180 Volt
- Loudspeaker
- - This model requires external speaker(s).
- Material
- Wooden case
- from Radiomuseum.org
- Model: SN-7 - Howard Radio Company; Chicago
- Shape
- Tablemodel, Box - most often with Lid (NOT slant panel).
- Notes
- Riders shows in the schematic a '71 tube. The pictured tube layout quotes '71A and the year1924. That year is impossible since a '71 did not yet exist. On the other hand a '71 is likely: otherwise 180 V for plate and -40 V grid bias don't make sense. Rider is in error. Built-in loop as first tuned RF circuit.
- External source of data
- Ernst Erb
- Circuit diagram reference
- Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
- Other Models
-
Here you find 354 models, 152 with images and 214 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Howard Radio Company; Chicago (IL)