Band Switch (CB21254E)

This switch or band selector for receivers was found in a Popular Electronics from the 1990s. The circuit uses a PIN diode.

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Compressor LS150 (CB15196E)
This “compandor” circuit has the opposite effect of CB15195E. The LS150 is not common today and...
Xenon strobe light (CB9108E)
This circuit was obtained from an American documentation from the 1980s. The T1 triggering...
Turntable Amplifier LM380 (CB14165E)
This circuit is suggested by the Linear Applications Handbook of National Semiconductor, being used...