300 to 3,000 Hz Speech Filter (CB6543E)

Found on an 80's Radio Electronics, this two-section circuit is designed to pass the frequency range of the human voice.

| Clique na imagem para ampliar |

Frequency Splitter for Loudspeakers (CB784E)
This circuit is indicated for small low power amplifiers allowing the use of a tweeter. The...
Crystal controlled oscillator (CB3928E)
This circuit generates signals controlled by crystal and can generate marks up to 30 MHz of 1 in 1...
5 ms delay (CB1475E )
The circuit shown was obtained from a 1976s publication for radio amateurs. Its purpose is to...