This simple 1-transistor audio preamplifier appeared in the June 1968 Radio Electronics magazine. The transistor is a general-purpose type of the time. The gain is 14 dB.
Originally intended to detect EMPs produced by tests or atomic blasts, this interesting circuit...
We found this circuit in 1967 General Electric documentation. SCRs can be replaced by current...
This power stage with two counterphase transistors and coupling transformers was shown in Radio...