Reflex receiver with loop antenna (T1659E)

This 3-valve receiver was found in a publication by Edelman from 1924. The circuit has two supply voltages, B being 60 to 90 V.

| Clique na imagem para ampliar |

80m Transceiver (CB17092E)
This transceiver circuit was found in a 1997 documentation. The circuit operates in the 80 meters...
CMOS Output Zero Crossing Detector (CB14158E)
We found this circuit in the Linear Applications Handbook published by National Semiconductor in...
Wien Bridge Oscillator (CB14117E)
The configuration presented below was obtained in the Linear Application Handbook of the National...