4-tube reflex (T1662E)

This circuit that uses a loop antenna was found in a 1924 publication. The circuit has several supply voltages and sets of audio and RF coils.

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Signal Injector (CB16359E)
This signal injector is of great use in the troubleshooting of radio receivers and amplifiers. What we...
1.2 W amplifier TBA820M 2 (CB15213E)
The output power of this amplifier depends on the supply voltage that can be between 3 and 16 V....
Amplification Stage (CB6178E)
This small signal amplifier circuit was found in Motorola's 1969 documentation. The FET and the...