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.

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Notch and Pass Filter LM3900 (CB4041E)
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LM3900 Differentiator (CB14216E)
In the figure we have a differentiator with the LM3900 transconductance amplifier. The circuit is...