We found this circuit with JFETs in a Radio Electronics magazine from June 1969. The circuit has its assembly described in a complete article. Equivalent transistors can be used.
We found this telephone amplifier in a European publication from the 1980s. The transistor can be...
In figure 1 we have an application for NLAS5113, a new device from on Semiconductor...
We found this circuit in a Popular Electronics from the 90s. Transistors can be modern...