The purpose of this circuit is to check the linearity of SSB amplifiers. The circuit was found in an old documentation for hams. The diode is a general purpose detector type.
Static charges in objects Dan be detected by this sensitive electroscope. The meter indicates when the...
Found in Popular Electronics from the 90s, this circuit generates a 1 kHz signal. The coil is from an...
Using a 555, this configuration appears elsewhere on this site. This is from American...