1 W amplifier (CB8948E)

This circuit was obtained in a 90s American documentation. The integrated circuit used is uncommon today. The circuit has a low RFI level.

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T Bridge Audio Oscillator (CB4689E)
This circuit is from an ancient American documentation. The T-Bridge circuit determines the...
2 Door Announcer (CB4757E)
This two-door doorbell was found in a 1990s US publication. The circuit is still current as...
Transistor Test (CB24799E)
This simple general purpose transistor test is nothing more than a Hartley oscillator. The...