On Sat, 17 Jan 2015 20:21:17 -0500, Gene Heskett wrote: I don't remember the type designation of those tubes, but Dirk Brauner owned many of very small tubes, aged, but still very good. I guess most people think that tubes are as big as a bulb, actually some tubes are not much larger than a few transistors. While I don't remember the type designation of those tubes, I still remember the awesome audio sound quality.