This 6W amplifier with 4 tubes was indicated in an American documentation from 1947 to operate with recorders. The circuit uses a source with a transformer.
This is an amplifier for recorder and return containing preamplifier and power amplifier with...
This flasher of two incandescent lamps was discovered in a 1983 documentation and it has two...
El circuito de la figura es un regulador de corriente con ajuste en el rango de 0 a 3 ampères. El...