This excellent tube preamplifier was found in Radio Electronics magazine from July 1958. The power supply was not included. The circuit has several inputs.
Intended for SSB and CW reception, this circuit was found in old English documentation. The...
Using two transistors, the resting current for this alarm is 25uA. The circuit was found in an...
This simple rain, leak or moisture detector circuit appears in other places on this site with...