16-03-2025, 03:36 PM
Good DC amplifiers were difficult in the days of valves. Philbrick made some good early valve op-amps, including the famous K2-W: https://sound-au.com/articles/opamp-history.htm Even into the 1960s, if you wanted really good DC performance you needed to use a chopper stabilised design. You didn't get much bandwidth!
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv







