Found in an Electronic Design of 1964, this circuit is intended to the signal amplification in the 88 to 108 MHz band. The transistor can be a modern equivalent.
This circuit consists of a constant current source for charging 12 V batteries. The charge is...
This simple neon lamp power indicator circuit was found in the January 1971 Radio Electronics...
We found this sophisticated meter circuit in an article in Radio Electronics magazine from June...