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 |

Non-Inverting Amplifier (CB20172E)
This amplifier circuit for instrumentation was found in the manual of the used integrated circuit...
TTL Beep-Beep (CB14033E)
We found this circuit in a 1986 Elettronica Pratica magazine, but the components used are common. As...
High current buffer (CB7280E)
Suggested by Popular Electronics, it is a digital amplifier, for pulses with frequencies up to a...