Microphone preamp (CB22043E)

This preamp was found in an old English publication. Any usage JFET can be employed. The output is high impedance.

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...