Up for sale is a matched pair of 6SN7GTB RCA Black Plates w/Copper Grid Posts, Side "D" Mounted Getter and Short Glass Envelope... This is a GREAT sounding tube... Give them a try!!! This is one of the most requested tubes by my customers... As with all vintage tubes, matched pairs are getting very hard to come by...
Amplitrex AT1000 Test Results 95%+ GM = within NOS Specs 90%+ EM = within NOS Specs |
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(GM) Mutual Conductance 2600 = SPEC |
(EM) Emission 8.0 gV = SPEC |
Noise Test |
(mU) Gain |
TUBE #1 |
2400/2400 (92.3/92.3%) |
7.9/7.7 (98.8/96.3%) |
5/5 |
19.8 20.5 |
TUBE #2 |
2320/2400 (89.2/92.3%) |
7.8/7.9 (97.5/98.8%) |
5/5 |
19.5 20.7 |
TUBE #3 |
N/A |
N/A |
N/A |
N/A |
TUBE #4 |
N/A |
N/A |
N/A |
N/A |
- PERFECT = 0.0% (Less than 5% = Outstanding)
- Balance (Balance Goal = Mhos > 5% / Gv > 10%)
- Tube 1: A to B = Mhos - 0.0% Gv - 2.5%
- Tube 2: A to B = Mhos - 3.1% Gv - 1.3%
- Match (Tube 1 to Tube 2) (Match Goal = Mhos > 5% / Gv > 10%)
- Tube 1A to 2A = Mhos - 3.1% 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 Low
- Tube Gain Scale : 20 Mu (+ or -) 3 Mu = Within Factory Specs
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