This circuit is intended to switch high frequency antennas using common diodes. The circuit is from an 80's documentation appearing in other versions in this same section of the site.
The purpose of this circuit is to extend the range of frequency meters (typically up to 30 MHz) to...
This 3-digit code switch was obtained from an old American documentation. The capacitor is 470 uF...
We found this circuit in the Philips integrated circuits manual of 1990. The basic component is...