Flasher with two settings (CB6802E)

Found in EEE documentation, this circuit can have the duration and frequency adjusted separately. SCRs can be modern equivalent types.

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2 transistor radio (CB20517E)
This circuit with germanium transistors was found in documentation from the 50's. The transistors are...
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The circuit presented was found in a documentation from the 1950s, generating a sinusoidal signal...
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This circuit was originally indicated as a signal reinforcement step for the previous receiver...