This circuit was found in Philips documentation from 1969. The components are from the time including transformers that are commercial types.
This JFET amplification stage was found in the April 1993 issue of Electronics Now. The input...
This circuit was obtained in a 1980 English magazine, but it can be easily assembled today, since...
We found this circuit in documentation from the 1980s. The integrated circuit used is uncommon today,...