![File:Prototype Armstrong superheterodyne receiver 1920.jpg](http://178.128.105.246/cars-http-upload.wikimedia.org/wikipedia/commons/thumb/c/ce/Prototype_Armstrong_superheterodyne_receiver_1920.jpg/800px-Prototype_Armstrong_superheterodyne_receiver_1920.jpg)
Size of this preview: 800 × 326 pixels. Other resolutions: 320 × 130 pixels | 640 × 261 pixels | 1,462 × 596 pixels.
Original file (1,462 × 596 pixels, file size: 240 KB, MIME type: image/jpeg)
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 17:25, 2 May 2021 | ![]() | 1,462 × 596 (240 KB) | Materialscientist | FFT |
01:35, 30 January 2014 | ![]() | 1,462 × 596 (130 KB) | Chetvorno | User created page with UploadWizard |
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):
Global file usage
The following other wikis use this file:
- Usage on vi.wikipedia.org