Description

S Y L V A N I A 6SN7 WGTA * B O G E Y S * CHROME TOPPED FOIL U. S. MILITARY TUBES BLACK FACING T PLATES PERFECT MATCHED SET Extremely Rare - NIB (Ships In *Original S Y L V A N I A Boxes) ★★★ Amazing Historic Military Tubes ★★★ U. S. A R M Y U. S. N A V Y J A N Military Specification Tubes Production Year: 1969 Perfect Match Codes: 6938 Short Brown Base Green Label Set of Two (2) Tubes Made In the U. S. A ★ ★ ★ These Tubes are Very Rare in Brand New Condition ★ ★ ★ BEST TUBES ON THE MARKET... NO LEAKS... NO SHORTS... ★★★ HICKOK TESTED ★★★ Tested on Hickok 750 for Emission, Mutual Conductance Where 50 mA is Good these tubes peg at 76/80 for Emission Where 2,600 μA is Good these tubes peg at 3,000/ 3,200 for Mutual Conductance Tube 1. Plate 1. - 80 mA - 3,200 μA at Idle - NOS Plate 2. - 78 mA - 3,100 μA at Idle - NOS Tube 2. Plate 1. - 77 mA - 3,000 μA at Idle - NOS Plate 2. - 76 mA - 3,000 μA at Idle - NOS Perfectly Balanced - Rare and Exceptional Full Tonal Range - Powerful Emission EXCL USIVE HIGH FIDELTY TUBE All of my Tube Inventory is Boxed and Thoroughly Tested... * Test Ratings are Specific to My Fully Calibrated Test Equipment! ***Coding is for my internal method... Tubes are marked to match shop reference and No. I, II... Stock Photos. The tubes are put through a Life Test and each plate is warmed and measured for emission, leaks and shorts! Each tube is thoroughly inspected, they are described accurately and listed based on fair value... My Return Policy : 30 Days - Seller pays return shipping! All tubes are Guaranteed to be as described... You can buy with complete confidence! Please read listing thoroughly and ask any questions prior to purchase... Tube rolling will not be tolerated! Any and all returns must be in identical condition as when they were received... Test Driving Vintage NOS Tubes is completely unacceptable and highly unethical! Buyer will be charged for mishandled and damaged returns... All tubes manufactured emit some type of sound, hum or slight microphonic! Noisy tubes would always be auctioned or tossed... I mark every tube in order to avoid tube rolling! Variations in Line Output and Test Equipment excludes any claims regarding matching test results on any equipment other than mine... * Test results from different Test Equipment IS NOT Guaranteed! International Buyers Welcome! I use eBay Global and USPS 1st Class International exclusively, unless otherwise stated... I am unable to change declared value on customs forms, and International Buyers are responsible for all taxes, customs and additional fees! Each tube is fully insured, boxed and shipped safely... ★ Expedited Shipping ★ ★ Shipping times may vary based on region ★ ★ * Honesty, * Reliability and * Integrity are * Everything ★