Seimens E88CC/6922 Platinum Matched Pair, 1967, Gold Pin, Low Noise, Phono Grade, Same Date

Beautiful Platinum Matched Pair of Made In Gernamy Siemens 6922/E88CC made in Germany.    
Test like new and extremely strong test results indicate this pair is used very little if at all.    

Platinum matched: all 4 sections are very tightly matched within less than 3%.   
Low noise and suitable for all application including phono stage.    

Fully guaranteed.  

Both tubes have the same Etched code on the metal plate inside the tubes: A2 7F (made in June 1967)

6922 tubes will have a longer lifespan than 6DJ8 tube.  In some cases 6922 tubes will last 5,000 to 10,000 hours vs 3,000 to 4,000 hours for 6DJ8 tubes.  

Payment by money order or check only (no Paypal please). 

Priority Mail shipping within US with tracking is $6.95. 

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Shorts and Gas Test: Passed    
Listening Test: Very good noise characteristics with no microphonics.   

Gm Test:   

Tube #1 Triode Section 1: 14400 
Tube #1 Triode Section 2: 14800     
Tube #2 Triode Section 1: 14700     
Tube #2 Triode Section 2: 14700  

Where minimum good is 7000 and Spec for new tube is 12500  

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All tubes are tested by Hickok 539C vacuum tube tester. This tester was precision calibrated by Roger Kennedy to improve measurement accuracy. 83 and 5Y3 tubes were replaced by Solid State rectifiers to minimize calibration drift in the tester.  

All tubes are installed into an actual audio circuit to screen them for internal tube noise/micorphonics.