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This circuit was obtained in 1965 General Electric documentation. SCRs can be modern common equivalents. The circuit fires with positive pulses. The load can be up to 7 A.
Found in a 1968 EEE, this circuit accepts frequencies from 1 to 1000 Hz and control voltages from 0.1 to...
This circuit has appeared several times on this site in different applications. This is from 1997...
This setting appears other times in this section from other sources. This is from an 80's American...