RARE: GE 6SN7GTB "NIB/NOS" "GLOW DOME" Tubes PLATINUM MATCHED on AT1000

Description: GE 6SN7GTB Tubes (Pair) - NEW in BOXMatching Production Date Codes: "IH" 1973 MAYShort Bottle - Side "O" Getter - Copper Grid PostsVERY RARE GLOW DOME (SEE PICS)Triple Platinum Matched on AT1000 - TESTS NOSPair of 6SN7GTB by General Electric with Side Getter, short glass envelope and copper grid posts. These rare GLOW DOME tubes were made for a short time in the late 60's to the mid 70's and account for less than 2% of all the GE 6SN7's ever made. These are without a doubt one of my most requested tubes. Pleasant warmth in the mid-range, nice bass and excellent detailed top end. The side mounted getter adds rigidity to the plate structure thus reducing microphonics. These are a bargain now but are quickly being gobbled up by audiophiles. Discover the quality of these quality USA made tubes as they will be worth their weight in gold in the future...Please Read Our Feedback and Buy with ConfidenceWe Stand Behind Everything We Sell Amplitrex AT1000 Test Results 95+% GM = Within NOS Specs 90+% EM = Within NOS Specs (GM) Mutual Conductance 2600 = SPEC (EM) Emission 8.0 gV = SPEC Noise Test (mU) Tube Gain TUBE #1 2650/2700 (101.9/103.8%) 8.0/8.1 (100.0/101.3%)5/5 19.4 20.4 TUBE #2 2740/2700 (105.4/103.8%) 8.1/7.9 (101.3/98.8%)5/5 19.6 20.1 TUBE #3 N/A N/A N/A N/A TUBE #4 N/A N/AN/A N/APERFECT = 0.0% (5% or Less = Outstanding)Balance (Balance Goal = Mhos > 5% / Gv > 10%)Tube 1: A to B = Mhos - 1.9% Gv - 1.3%Tube 2: A to B = Mhos - 1.5% Gv - 2.5%Match (Tube 1 to Tube 2) (Match Goal = Mhos > 5% / Gv > 10%)Tube 1A to 2A = Mhos - 3.5% Gv - 1.3%Tube 1B to 2B = Mhos - 0.0% Gv - 2.5%Noise Test Scale: 5 = Ultra Low; 4 = Very Very Low; 3 Very LowTube Gain Scale : 20 Mu (+ or -) 3 Mu = Nominal BULLz TUBEz About BULLzTUBEz:I've been an Audiophile for over 50 years, 2 time National Champion in Car Audio and owned a chain of Car Stereo Stores... I have a massive collection of vacuum tubes specializing in mostly esoteric tubes but we have just about any tube you need. Just check the store for the listed inventory. If you have a request just send a message to NOVA.76 through the eBay messaging system... We stand behind everything we sell... Our goal is to "Create a Positive Experience"... It starts with you, "The Customer"!!! About our TUBEz:All tubes are tested with the Audiophile in mind for SHORTS, GAS, MUTUAL CONDUCTANCE and NOISE (large tube lots are not tested for noise). All our tubes are tested thoroughly on an Amplitrex AT1000... Our backup tube testers are a Hickok 752A, Precision 612 and Eico 667... I WILL NOT GUARANTEE THAT OUR READINGS WILL MATCH YOUR READINGS... About Our Rating System: NIB: New in Original or White BoxNOS: New Old Stock (given to tubes that meet or exceed factory values)UTS: Used Tube Tests StrongUTG: Used Tube Tests Good Warranties:Used or vintage items are sold as is with no warranty beyond the description and photographs provided on the listing. Returns will NOT be accepted for reasons such as: ordered the wrong item, changed mind, not what I thought it was, wrong color ordered, wrong item ordered or tube readings don't match my tester. Any exceptions are on a case by case basis. Flashing Spots above the Cathodes is NOT an indication of a bad tube. The only way to test whether or not a tube is good is electrically. These spots can appear immediately when the tube is powered up for the 1st time or take time to appear... Shipping:Domestic Shipping to the continental United States will be by the US Postal Service (USPS) including free tracking. Some items listed will ship free and will be clearly listed as "free Shipping". Items not listed as free shipping will be for the cost of packaging plus shipping only, no extra charge will be added to the USPS fee. INTERNATIONAL BUYERS PLEASE CHECK THE SHIPPING CHARGES PRIOR TO BIDDINGInternational Shipping will be offered for select items and will be clearly identified in the listings Shipping & Payment tab. Shipping will be by the "eBay International Standard Shipping" and be made available as a shipping option at check-out. Shipping costs to international locations will be paid by the buyer. The shipping and handling cost will be clearly identified at check-out. THERE ARE NO RETURNS ON INTERNATIONAL SHIPPING, apart from the exceptions as dictated by eBay... Please note the following:Import duties, taxes and charges are not included in the item price or shipping charges. These charges are solely the buyer’s responsibility.Please check with your country’s customs office to determine what these additional costs will be prior to bidding/buying.These charges are normally collected by the delivering freight (shipping) company or when you pick the item up – do not confuse them for additional shipping charges.We do not mark merchandise values below value or mark items as ‘gifts’ - US and International government regulations prohibit such behavior.

Price: 125.92 USD

Location: Brunswick, Maryland

End Time: 2025-01-28T17:06:49.000Z

Shipping Cost: N/A USD