This small tube amplifier appeared in Radio Electronics magazine in February 1958. The circuit is powered by the mains with a power transformer and output with different impedances.
This circuit was found in an old American documentation. The integrated circuit used is uncommon...
This circuit was obtained from a 90s Radio Electronics. The value of R1 determines the scale...
We found this circuit in the 2005 Linear Technology component manual. The circuit can be used as a...