Grid leak detector (T415E)

This circuit was found in a modern documentation of experiments with tubes. It shows a typical AM detector used in many old radios.

Precision Diode LM101 (CB4607E)
The basis of this circuit is a National Semiconductor operational amplifier that functions as a...
Microchip Launches Its First Sigfox FCC-certified Long-Range RF Transceiver and Connectivity Development Kits for IoT Applications
CHANDLER, Ariz., LABEGE, France - Oct. 26, 2016 – Microchip Technology Inc. (NASDAQ: MCHP), a...
Who is the fastest (CB4380E)
This circuit was obtained from an English magazine from 1976. The circuit operates two LEDs and...