This is the traditional voltage follower configuration with the 741 operational amplifier. The circuit is from 1976 documentation and the power supply must be symmetrical from 6 to 15 V.
The transistor of this remote preamp can be the BC549. We found this circuit in a 1976 technical...
Although it is a common configuration today, these circuits were taken from an old publication. The...
We found this circuit in a 1982 publication. This source allows an adjustment of the output...