This circuit responds to frequencies from 100 Hz to 3 MHz. We find it in a 90s Radio Electronics. Transistors are general purpose types.
This circuit was found in a 2005 Linear Technology application manual. The circuit can be used...
This amplifier is from a commercial product from the 1970s. The circuit uses germanium transistors and...
This is a circuit published in the January 1962 Radio Electronics magazine. The circuit is for...