File:TRF Dials.jpg
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Summary[edit]
| Description |
English: Typical dial layout of a tuned radio frequency (TRF) receiver from the 1920s. A TRF receiver had several tuned radio frequency amplifier stages before the detector, each consisting of a vacuum tube amplifier and a tuned circuit with a variable capacitor. The multiple tuned circuits each had to be tuned to the frequency of the desired station before the radio would work. Later TRF receivers had the capacitors mounted on a common shaft so they could be tuned together with a single knob, but early receivers like this one had separate tuning knobs for each capacitor. |
| Source | Own work |
| Author | Sweidman |
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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. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:44, 15 April 2009 | | 1,792 × 1,200 (612 KB) | Sweidman (talk | contribs) | Closeup of Tuned Radio Frequency Receiver Dials |
| 19:41, 15 April 2009 |  | 1,024 × 587 (175 KB) | Sweidman (talk | contribs) | {{Information |Description={{en|1=Typical Dial Layout of Tuned Radio Frequency Receiver}} |Source=Own work by uploader |Author=Sweidman |Date= |Permission= |other_versions= }} <!--{{ImageUpload|full}}--> |
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