Tone Control (CB6306E)

This circuit was found in an Electronics World of 1969. The components of the time. The operational can be replaced by modern equivalent type.

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7 MHz TTL VCO (CB21497E)
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This amplifier for biological research was found in an Electronic Design from 1964. The...
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Found in National Semiconductor publication from the 1980s. This gain-100 circuit can be...