Sylvania 6SN7GT "BAD BOY" - TESTS NOS

2-Hole "Bad Boy" Black Plates - Bottom "Foil" Getter - Tall Bottle

Triple Platinum Matched on an Amplitrex AT1000

  • Tube 1: Vintage 1949 SEP
  • Tube 2: Vintage 1949 SEP
  • Matching Production Date Codes: "I9M"

These are the real deal 1949 Sylvania 6SN7GT "BAD BOY" Tubes with 2-Hole Black Plates and Bottom "Foil" Getter. These are one of my most popular tubes because they sound SO good. My customers give them great reviews. It's a great tube at a reasonable price, but not for long!!!

Please Read My Feedback and Buy with Confidence
I Stand Behind Everything I 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) Gain

TUBE #1

   2600/2600    (100.0/100.0%)

       7.8/7.7       (97.5/96.3%)

 5/5 

19.4 20.1

TUBE #2

     2600/2650     (100.0/101.9%)

      7.7/7.9       (96.3/98.8%)

 5/5

19.4 19.9

TUBE #3

N/A

N/A

  N/A

N/A

TUBE #4

N/A

N/A

 N/A 

N/A

  • PERFECT = 0.0% (5% or Less = Outstanding)
  • Balance (Balance Goal = Mhos > 5% / Gv > 10%)
    • Tube 1: A to B = Mhos - 0.0%  Gv - 1.3%
    • Tube 2: A to B = Mhos - 1.9%  Gv - 2.5%

  • Match (Tube 1 to Tube 2) (Match Goal =  Mhos > 5% / Gv > 10%)
    • Tube 1A to 2A = Mhos - 0.0%  Gv - 1.3%
    • Tube 1B to 2B = Mhos - 1.9%  Gv - 2.5%

  • Microphonics Test Scale: 5 = Ultra Low; 4 = Very Very Low; 3 Very Low
  • Tube Gain: 20 Mu (+ or - 3Mu) = Factory Specs

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...

I stand behind everything I sell... My goal is to "Create a Positive Experience" for my customers...

About My TUBEz:

All tubes are tested with the Audiophile in mind for SHORTS, GAS, MUTUAL CONDUCTANCE, EMISSION and NOISE (large tube lots are not tested for noise). All my tubes are tested thoroughly on an Amplitrex AT1000... My backup tube testers are an AVO MKIV and another Amplitrex AT1000... I WILL NOT GUARANTEE THAT MY READINGS WILL MATCH YOUR READINGS... Variations in Line Voltage and Test Equipment excludes any claims regarding matching test results on any equipment other than mine...

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: don't like the sound, 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 and subject to a 15% restocking fee... 


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 BIDDING
International 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:
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  • 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.
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