Found in a February 1949 Radio Electronics magazine, this dual tube mixer has 4 inputs. Power must come from a 250V source.
This circuit monitors the current in the negative line. The circuit is from a 2005 Linear...
An oscillator whose frequency can be adjusted between 500 Hz and 5 kHz with the use of a...
This circuit allows coupling optical signals to a TTL input with excellent performance. Among the...