Hydrophone preamplifier (CB21486E)

This circuit was found in old American documentation. It has 40 dB gain between 10 Hz and 10 kHz. Modern equivalent transistors can be used.

| Clique na imagem para ampliar |

Pulser (CB12114E)
This circuit intermittently activates a relay. It was obtained in a 1980 publication. In fact, we...
Benchtop Amplifier (CB6978E)
Suggested by a Popular Electronics, this small amplifier that has a detector to follow RF...
Regulator with Slow Turn On - TL317 (CB1248E)
This source gently applies the voltage to the load, causing it to rise slowly, thus avoiding...