- Country
- United States of America (USA)
- Manufacturer / Brand
- Sparks-Withington Co., (Sparton); Jackson, Michigan
- Year
- 1932
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 79855
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 13
- Main principle
- Superhet with RF-stage; ZF/IF 172.5 kHz; 2 AF stage(s)
- Tuned circuits
- 8 AM circuit(s)
- Wave bands
- Broadcast only (MW).
- Power type and voltage
- Alternating Current supply (AC) / 60 cycles, 100 to 130 Volt
- Loudspeaker
- 3 Loudspeakers
- Material
- Wooden case
- from Radiomuseum.org
- Model: Sparton 28X - Sparks-Withington Co., Sparton
- Shape
- Console, Highboy (legs > 50 %).
- Notes
-
The Sparton 28-X is an AC operated 13 tube BC band receiver. Has a band filter input circuit and push-pull output. Also has Inter-station noise suppressor and three electrodynamic speakers.
The schematic used for this model is also used for models 17, 18, 111-X, 750-A, 750-X, 870-A and 870-X.
See article here about different radio seasons.
- Literature/Schematics (1)
- Sparton Radio Service Manual (Sparton Manual 1, Bulletin 31-1, 2, 3, 4)
- Author
- Model page created by Ernst Erb. See "Data change" for further contributors.
- Other Models
-
Here you find 773 models, 361 with images and 720 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Sparks-Withington Co., (Sparton); Jackson, Michigan