Transistor testing center (CB23768E)

We found this test circuit in a March 1967 Radio Electronics. The circuit uses a zener-regulated supply and analog indicator.

| Clique na imagem para ampliar |

Christmas Tree (CB26117E)
This flashing allegory with 555 integrated circuits was found in the Radio Electronics...
Voice Suppressor (CB4751E)
This interesting circuit found in a European publication from the 1990s eliminates the voice that...
Frequency Comparator (CB20113E)
This circuit also functions as a phase detector. The components used are not common. We found this...