This sensitive Japanese mid-wave receiver from the 1960s has an output power of 45 mW and is powered by 3 batteries (4.5 V). The circuit is superheterodyne with an IF of 455 kHz.
This circuit was obtained in a 1977 magazine, but it can still be easily assembled, as the...
This intercom for the 27 MHz band was found in a recent English documentation, working with a...
This relay shield circuit for old computers was found in January 1983 Radio Electronics magazine. The...