We would love tunnel diodes in packaging for our semiconductor? display ay smecc ed# On Friday, November 15, 2019 charlesmorris800--- via cctalk <charlesmorris800 at centurytel.net; cctalk at classiccmp.org> wrote: for me. You must not own any older Tektronix scopes then. At one time I had fourteen and there were several tunnel diodes in almost every one (trigger circuits mostly). And their characteristics do drift with age, sometimes out of the range of adjustment :) -Charles