| Three-part vacuum tube in old TVs |
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| Old TV tube |
Premier Sunday |
21 Jan 2024 |
| Transistor ancestor |
Newsday |
19 Jun 2022 |
| Vacuum tube type |
New York Times |
05 Sep 2021 |
| Thermionic valve |
The Times Concise |
25 Jan 2021 |
| Vacuum tube with three components |
Universal |
31 Jul 2020 |
| Vacuum tube type |
Eugene Sheffer |
21 Dec 2019 |
| Amplifier of radio signals |
New York Times |
24 Nov 2019 |
| Amplifier of radio signals |
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| Short journey with poem in the Tube |
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| Vacuum tube which was the first practical electronic amplifier |
The Times Specialist Sunday |
24 Feb 2019 |
| Old vacuum tube |
New York Times |
14 Oct 2018 |
| Certain vacuum tube |
New York Times |
05 Aug 2018 |
| Three-part vacuum tube |
Jonesin |
19 Jun 2018 |
| Radio set working – as this valve appears? |
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| Certain vacuum tube |
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| Old vacuum tube |
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| Old TV tube |
Premier Sunday |
04 Dec 2016 |
| Old radio tube |
USA Today |
17 May 2016 |
| Early radio component |
Wall Street Journal |
24 Feb 2016 |
| Old radio tube |
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| Guitar amp part |
Newsday |
14 Nov 2015 |
| Transistor's forerunner |
Wall Street Journal |
11 Sep 2015 |
| Wretched to ride tube linking three terminals |
The Times Cryptic |
17 Aug 2015 |
| Vacuum tube with three elements |
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| Transistor's forerunner |
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| Guitar amp part |
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| Console radio part |
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| Vacuum tube with three elements |
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| Old radio tube |
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| Old TV part |
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| Old TV component |
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| Transistor's forerunner |
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| Transistor's forerunner |
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| Transistor ancestor |
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| Vacuum tube type |
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| Old vacuum tube |
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| Vacuum tube with three elements |
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| Vacuum-tube type |
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| Vacuum tube type |
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| Electron tube type |
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| Type of vacuum tube |
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| Certain vacuum tube |
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| Control grid's place |
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| Old TV part |
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| Vacuum tube |
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| Three-part vacuum tube |
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| Type of vacuum tube |
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| Amplifier component |
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| Vacuum tube |
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| Tube type |
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| Electrical amplification device |
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| Vacuum tube |
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| Three-element vacuum tube |
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| Certain electron tube |
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| Three-element vacuum tube |
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| Television tube |
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| Electron tube |
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| Amplifying tube |
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| Amplifying tube |
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| Type of vacuum tube |
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| Certain electron tube |
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| Old computer tube |
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| Vacuum tube type |
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| Vacuum tube type |
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| Old radio tube |
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| Vacuum tube with three elements |
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| Invention of 1906 |
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| TV tube |
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| Vacuum tube type |
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| Certain tube |
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| Vacuum-tube type |
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| A vacuum tube |
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| Electron tube |
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| Electron tube. |
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| Vacuum tube. |
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