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1. Vintage Brimar 12AT7 ECC81 Grey Plate Square Getter Valve Tested (K794)

   Tested 4000/4000 mhos gm

   eBay

2. NEC 12AT7 (S) ECC81 Thin Smooth Gray Plates Fat Ring Getter NOS

   Tube testers do not test for these problems in the manner in which you think, except to the extent that a tube tester with sensitive leakage detection will find far more “noisy” tubes than a tube tester with only “fair” leakage sensitivity, to the extent that the noise is due to this problem.

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3. Mullard CV4024 KQDD/K (12AT7WA) (ECC81) (M8162) NOS Valve Tube (KM65)

   CV4024 654 R3H2 1963 Test 5000/5100 umhos gm

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4. Brimar 12AT7 (ECC81) Halo Getter Valve Tube Tests Good Made in England

   Brimar 12AT7 (ECC81) Halo Getter Valve Tube Tests Good Made in England

   eBay

5. Mullard KB/D ECC81 12AT7 Mottled Glass Valve Tube Used Tested (V51) #4

   ECC81 12AT7 Valve Tube. Mullard, British Made. Grey Plates, Halo Getter, Mottled Glass Construction. KB/D Military Print, 650 Code in the Glass.

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6. Mullard Modern Logo 12AT7 ECC81 Valve Tube NOS Boxed (V43)

   Modern Logo CV4024 ECC81 12AT7 Valve Tube. Mullard, Made in Great Britain. Strong & Balanced.

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7. Mullard CV455 KB/DA (ECC81) (12AT7) dual print 1962 O get Valve Tube (M223)

   Mullard CV455 KB/DA (ECC81) (12AT7) dual print 1962 blkburn O get Valve Tube. (M223) BK600 test = 86/90

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8. (2) Date Matched TrueTone 12AT7 / ECC81 TUBES STRONG! (TESTED W/ TV-7D)

   (TESTED W/ TV-7D).

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