![The thermionic vacuum tube and its applications . eans of a switch the current can also be transmitted directlyfrom the source to the receiver. When the attenuation of theartificial line is The thermionic vacuum tube and its applications . eans of a switch the current can also be transmitted directlyfrom the source to the receiver. When the attenuation of theartificial line is](https://c8.alamy.com/comp/2CE4Y14/the-thermionic-vacuum-tube-and-its-applications-eans-of-a-switch-the-current-can-also-be-transmitted-directlyfrom-the-source-to-the-receiver-when-the-attenuation-of-theartificial-line-is-so-adjusted-that-the-intensity-of-the-current-inthe-receiver-is-the-same-whether-it-passes-directly-to-the-receiveror-through-the-tube-and-line-to-the-receiver-then-the-current-isattenuated-by-the-line-as-much-as-it-is-amplified-by-the-tube-andthe-amplification-can-therefore-be-obtained-from-the-known-con-stants-of-the-line-216-thermionic-vacuum-tube-the-circuit-arrangement-used-for-testing-audio-frequ-2CE4Y14.jpg)
The thermionic vacuum tube and its applications . eans of a switch the current can also be transmitted directlyfrom the source to the receiver. When the attenuation of theartificial line is
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