This 6-transistor commercial radio with 6 V supply was found in a Japanese publication from the 1960s. The circuit is a commercial superheterodyne with 150mW to 200mW of battery powered output.
This circuit was fond in an old publication of the years 1950. The transistors are germanium types and...
In recovering vinyl media with turntables with magnetic capsules the circuit below can be useful. It...
This circuit used in signaling for boats, cars or barriers was found in a 1980s documentation. It still...