Fast log generator (CB7595E)

We found this circuit in a 90s Popular Electronics. The operational amplifier can be replaced by current equivalents.

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Variable mixer (CB9032E)
This dynamic mixer allows for smooth adjustment of the signal's passage from one channel to...
Power Switch (CB387R)
Using this circuit a low current switch can be used in the control of heavy duty loads, powered...
Reflected Power Adapter and Monitor CW (CB3884E)
We found this circuit in an old American documentation for hams. The circuit serves as a telegraph...