This circuit can modulate a laser rate at frequencies of 50 kHz. We found the old documentation. The bipolar transistors can be the BD135 and 136 and the FET admits equivalent.
This amplifier provides a maximum power of 7 W, depending on the supply voltage. The integrated...
Found in a 90s R-E Experimenters Handbook, this circuit amplifies signals from 100 Hz to 3 MHz....
The gated oscillator in the figure bellow tums on when a “0" Iogic Ievel is applied to its input....