Balanced modulator (CB7927E)

We found this circuit in a 1968 Hughes publication. The components are from the era and can be replaced by modern equivalents.

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Gain 1000 Amplifier (CB6780E)
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10-minute timer 555 (CB9368E)
Found in a magazine 73 for radio amateurs, this circuit has two settings, one for the interval and the...
Sencore Transistor Tester (CB18449E)
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