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Nuvistors—miniature, small-signal, vacuum tubes made of metal and ceramic—were introduced by RCA in 1959, at the dawn of the transistor revolution. RCA used them throughout the 1960s in its New Vista line of television sets, mostly in the tuner section. But by the early 1970s, solid-state devices had all but replaced tubes, nuvistors included (with a few notable exceptions). Ampex based the electronics of its well-regarded, late-'60s MR-70 open-reel tape deck on nuvistors, which were also used in microphone preamplifiers—in both cases for their very low noise and reputation for reliability and long life. For a time, Conrad-Johnson used them as well. While nuvistors may seem exotic today, they're hardly rare. On eBay you can find for sale hundreds if not thousands of used and new-old stock (NOS) nuvistors, as well as nuvistor sockets, without which the tubes are less easy to implement. (But they can be, and often are, hard-wired into a circuit.)

Various Artists: Hommage à Eberhard Weber
Pat Metheny, Jan Garbarek, Gary Burton, Scott Colley, Danny Gottlieb, Paul McCandless, Michael Gibbs; SWR Big Band, Helge Sunde, conductor
ECM 2463 (CD). 2015. Martin Muhelis, concert prod.; Doris Hauser, Volker Neumann, Boris Kellenbenz, Pete Karam, Manfred Eicher, engs. DDD? TT: 69:48
Performance *****
Sonics *****

There once was a joke about how technology would someday replace troublesome musicians: Instead of putting up with drummers being late to gigs, keeping irregular time, and stealing everyone else's girlfriends, a trouble-free robot could take over. It seems that some of those predictions have come true. This single disc documents two concerts held in Stuttgart, Germany, in January 2015, to celebrate the 75th birthday of hometown German jazz electric bassist Eberhard Weber, who has been unable to play since suffering a stroke, in 2007. Via tape loops and video samples of Weber playing, he nonetheless played a large part in his birthday celebration, particularly in the concerts' centerpiece, Pat Metheny's 30-minute "Hommage," a rare example of Metheny writing for big band and a tour de force of Weber's distinctive playing.

Say what you want about eBay and their fees, which are no doubt passed on to the customers, but photos do not lie.