Sylvania-set of four vintage JAN CHS 6B4G vacuum tubes NOS "Power Triodes" Start Price USD 9.99 Current Price USD 214.50 Time Left - Bid Count 9 Buy It Now Price - Reserve Price - Start Time Sunday, August 24, 2008 End Time Sunday, August 31, 2008 Location Bonnots Mill, MO See more about 'Sylvania-set of four vintage JAN CHS 6B4G vacuum tubes' Description Here is a set of four ST-16 (shoulder type) glass 6B4G power triodes made by Sylvania for the military.  They have a June 1952 acceptance date.  They are NOS tubes in the original boxes.  There is a D2M code under the tube number on the glass. I checked them out on my Hickok 539B tube tester and they got 2800, 2600, 3400, and 3000 micromhos out of a minimum of 1900.  I don't know if this is close enough to call matched, but they have lots of life in them. I think an amp builder would be interested in this octal variant of a 2A3 audio output tube and they sure look impressive lit up.  I have no reserve on this vintage glass and the buyer will pay actual shipping and insurance costs by USPS.  I will safely pack and handle them for no cost.  Good luck bidding and thanks for looking!! Place a Bid!