File:TFR Tube Layout.jpg
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| Description |
English: Six tube antique Tuned Radio Frequency receiver from the early 1920s, showing tube layout. Before the superheterodyne receiver, radios did most of the amplification of the signal at the radio frequency. The low gain of early vacuum tubes at radio frequencies required many tubes to achieve adequate volume. |
| 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 | 19:24, 15 April 2009 | | 1,024 × 768 (311 KB) | Sweidman (talk | contribs) | {{Information |Description={{en|1=TRF Radio Typical Tube Layout.}} |Source=Own work by uploader |Author=Sweidman |Date= |Permission= |other_versions= }} <!--{{ImageUpload|full}}--> |
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