Remote Dialer (CB24765E)

This circuit was found in the October 1983 Radio Electronics issue. It is applicable to old analog telephones. The circuit uses common components.

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1 kHz High Pass Filter (CB25997E)
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Variable Timing Ring Counter (CB6107E)
General Electric suggests this circuit in an 80's documentation. The circuit makes use of PUTs...
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This circuit that appears in several versions in this section and on this website was found in...