This receiver is from a 1924 Gernsback publication. The receiver has good efficiency when powered by the indicated voltages. Listening is through a high-impedance phone.
March 2017 - The new Texas Instruments TPA3244 class D amplifiers with power ratings from 60 to...
This circuit slows down a pulse applied to its input. The delay depends on the capacitor and...
We found this peak audio indicator in a 1980 publication. The M1 indicator can be 200 uA with the...