We found this circuit in an old Popular Electronics. The circuit is experimental, driving an LED from signals applied to the LDRs. The power supply does not have to be symmetrical.
This circuit is from 1995 documentation. The power depends on the transformer, which in this case...
Indicated for adjustment in transmitters for the 11-meter band, this circuit with analog meter was...
Frequencies other than the one for which this filter was calculated can pass with a unit gain to...