PP5/400 Mazda ( PX25 type) Triode Tube British Pair Original box, tested and guaranteed Start Price USD 1,699.00 Current Price USD 1,699.00 Time Left - Bid Count 0 Buy It Now Price - Reserve Price - Start Time Monday, November 17, 2008 End Time Monday, December 01, 2008 Location Normal,Illinois See more about 'PP5/400 Mazda ( PX25 type) Triode Tube British Pair' Description SquareTrade © AP6.0 Here's a pair of nice, vintage, original box, genuine British made Mazda PP5/400 (type interchanges with PX25 ) globe bulb tubes, just the thing for that triode amplifier you've always been meaning to build. These have identical anode and glass construction, test like new as PX25 and close to each other (within 10% for anode current). For more data on this tube type please see: http://www.mif.pg.gda.pl/homepages/frank/sheets/146/p/PP5-400.pdf and http://www.r-type.org/exhib/aaa0133.htmIf you need B4 British 4 pin type sockets for these tubes, please I can supply those as well, please see my Ebay store listings.The bid price is for the pair of tubes together.Tubes were tested on an AVO tester at normal operating voltage (~400VDC)  for plate current and transconductance, and they were also tested for leakage and shorts. Tubes are guaranteed for 30 days against defects (but not breakage, so don't smash them with a hammer!), so long as you're willing to mail back anything that doesn't work right. Shipping to these items is FREE to USA and all other countries I normally ship tubes to (however I get to pick the shipping method if I'm paying for it, if you want special shipping methods such as Fedex please contact me for cost). At this time I'm wandering around Europe for a spell looking for cool new tubes to offer my customers, they'll be shipped from whatever place I happen to be at the time you pay for the goods. I can ship via Post Office inside or outside the USA. I reserve the right to block or reject any bidder, (and will block people with private hidden feedback), but if you're a regular Joe with typical feedback, you shouldn't worry about that. If your country isn't listed, please contact me before bidding. I may be able to accommodate your bid if I can insure your package, although there may be additional cost. Tubes are offered by Tubezone.net Inc. Bid price is for the pair of tubes. Want to keep up with my latest offers? See 'em on your Google home page or in other readers! Sign up for my RSS feed. Sellers: Get your own map today. Click here now. Simple." Place a Bid!