This circuit generates signals for adjustments in FIs of 10.7 MHz. The transistors can be BC548 or equivalent. We found this configuration in a documentation from the 70s.
Originally created to power an 80's RTTY printer, this circuit can be used in other applications. The...
Using a Norton operational amplifier circuit, we have in the figure a variable voltage regulator. The...
This powerful sound emitter used in defense to intimidate people was found in a 90s Popular...