To give your 741 a run for their money: http://www.philbrickarchive.org/k2-w_refurbished.pdf http://www.philbrickarchive.org/k2-w_refurbished.pdf +-300V suppl

To give your 741 a run for their money: http://www.philbrickarchive.org/k2-w_refurbished.pdf http://www.philbrickarchive.org/k2-w_refurbished.pdf +-300V supply + 6.3V heater. Amazing little thing. And technically this is an integrated circuit. The plot thickens: https://web.archive.org/web/20040417203904/http://www.eetimes.com/anniversary/designclassics/opamp.html https://web.archive.org/web/20040417203904/http://www.eetime... Fascinating stuff this.