This is yet another balanced modulator circuit for SSB transmission. This two-diode circuit was found in a 1980s documentation. The diodes are commonly used.
This circuit was found in an English magazine from 1979. The magazine no longer exists, but the...
The search coil of this detector consists of 140 turns of wire 18 in an 8 inch diameter form. The...
This circuit of an old publication produces the insect-like noise that drives them away. The...