Test circuit with bridge (CB22530E)

This bridge-biased transistor test circuit measures gain in the range 0 to 300. Circuit is from Radio Electronics June 1952.

9V FET FM Transmitter (CB14877E)
This small FM transmitter, with a few tens of meters in range, is powered by a 9 V battery. The...
1kHz High Pass Filter (2) (CB11556E)
This filter was obtained from the Texas Instruments Linear Circuits Applications. It makes use of...
Audio Oscillator Driven by a SCR (CIR832E)
Figure 1 shows a simple audio oscillator driven by the SCR When the sensor is closed. The circuit...