Wikimedia Commons

File:Crosley Pup radio - Indiana State Museum - DSC00410 (cropped).JPG

Original file ‎(963 × 1,060 pixels, file size: 352 KB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary edit

Description
English: Early radio and television equipment, Indiana State Museum, 650 West Washington Street, Indianapolis, Indiana, USA. Left to right:
  • 1915 De Forest Audion vacuum tube was the first device which could amplify electrical signals, creating the field of electronics.
  • 1923 Crosley "Pup" radio; this single tube receiver was manufactured in Cincinatti.
  • AT&T double button broadcasting microphone used in Indianapolis' first successful radio station, WFBM, established 1924.
  • 1927 experimental television receiver prototype built by Morris VanWay for RCA used a spinning disk with holes in front of a neon light to create an image. Before modern electronic scan television was developed around WW2, many radio stations broadcast experimental mechanical scan television programs.
Date
Source Self-photographed
Author Daderot
Permission
(Reusing this file)		 Public domain.
Other versions
image extraction process
This file has been extracted from another file
: Radio equipment - Indiana State Museum - DSC00410.JPG
original file

Licensing edit

Public domain I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
In some countries this may not be legally possible; if so:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current15:31, 25 February 2018Thumbnail for version as of 15:31, 25 February 2018963 × 1,060 (352 KB)GeeTeeBee (talk | contribs)File:Radio equipment - Indiana State Museum - DSC00410.JPG cropped 78 % horizontally and 67 % vertically using CropTool with lossless mode.

You cannot overwrite this file.

File usage on other wikis

The following other wikis use this file:

Metadata

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:Crosley_Pup_radio_-_Indiana_State_Museum_-_DSC00410_(cropped).JPG&oldid=871340970"