6900 NOS GOLD PIN Matchd Pair 5687 7044 7119 Bendix NIB Best Audio Amp Matched Pair Tubes Test Extremely High!! Start Price USD 649.99 Current Price USD 649.99 Time Left - Bid Count 0 Buy It Now Price - Reserve Price - Start Time Monday, November 24, 2008 End Time Wednesday, December 24, 2008 Location Everything Under the Sun! See more about '6900 NOS GOLD PIN Matchd Pair 5687 7044 7119 Bendix NIB' Description NEW PRICING THIS WEEK ONLY!  BUY IT NOW! This auction is for an absolutely beautiful pair of NOS new old stock, NIB new in box, MU brand 6900 GOLD PIN tubes. Bendix Red Bank Series.  Vintage on boxes 1979.   These are internally matched and both tubes match:  all four triodes test off the charts high at 14,000 ohmos!  THE EXTREME TOP OF THE LINE AUDIO TUBE.  Excellent sounding!!!  These are an extremely musical version of the 5687 tube.  Also interchange with the 7044 and 7119 tube.  They were used in military radar units and built to extremely high standards.  Compatible with Audionote and other quality high end amplifiers.     These are new old stock.   100% of all 6900s were tested before being sold to the military.   For some unbiased praises of this tube and other Bendix Red Bank types, check out Vacuum Tube Valley's article: http://www.vacuumtube.com/issue5.htm  "The 6900 is a version of the 5687 medium-mu triode. Like the power types above, its construction is massive...It plugs right into a 5687 socket and works. Its transconductance is about twice that of a 5687, making the 6900 a very intriguing item for high-end audio equipment...Red Bank tubes may be the ideal devices for the guitarist who loves music enough to buy only the very best...In a world drowning with advertising hype and ego, it's nice to know of something that is unquestionably 'the best'." You will find that the umhos on them does not drop over time as with other tubes.   First, they use materials that do not outgas into the vacuum when they construct the tube. Second, the cathode material is made for pulse applications and does not easily flake off. Third the gold grid wire aids the grid current to stay low. All this makes for a very stable 10,000 hour tube in pulse applications and even higher in audio. They are THE best twin triode ever made in terms of construction and sonics. Please see my other high quality, original, new old stock vacuum tube auctions.    International bidders very welcome!!! Satisfaction Guaranteed!        Place a Bid!