We found this circuit in the 1992 special edition of the Electronics Experimenter Handbook. The components used are still current, many admitting equivalents.
This circuit was found in many record players with crystal phono pickups. The output power is 800...
The 8038 is an integrated waveform generator (sinusoidal, triangular and rectangular) from...
This protector was found in an Electronics Now from the 90s. The 250 V transient suppressors are common...