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TUBES - Amp 4-400 Recon-Tested AND TUBE TESTING TWO, 4-400 Amperex RESTORED and TESTED to 'like new' condition. AM BC Pulls ENGINEERING BASED TESTING with full test data and LINEARITY GRAPH/EQUATION, all designed and tested by me, an R&D engineer MONSTER heat sink INCLUDED Video of the restoring and testing process thru Ytube link $300 cash, P.O. MO or check after clearance. NO guarantee of any kind to Hobbyists. These are industrial and broadcast tubes, not hobby toys. Hams are known for destroying amp tubes. NOT for sale to No Code Licensees UNLESS you can assure me you wont DIE. Have your Elmer contact me. You can DIE JUST PLUGGING IT IN. Contact- email, send your phone #. Pickup/Shipping E TN Pickup preferred to prevent shipper from playing Basketball with the package. Shipping, YOU determine the box and packaging and carrier, ship the box to me with a return ship label. UPS, Fedex or Postal. TUBE TESTING Currently set up to test 3/4- 400/500, others possible. Test fixture to 2 KV for "minimum distortion bias case". Listing #1766494 by K8BYP Submitted on 04/29/26 Web Site: https://www.youtube.com/watch?v=nKq12OIVcXU Submitted from mobile-107-77-233-110.mobile.att.net Click to Contact Back to Previous Page

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