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12AU7 CLEARTOP RCA matched pair CRYO | by
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12AU7 CLEARTOP RCA matched pair CRYO

(1) matched pair RCA 12AU7 clear tops w/ side d-getters. Gray plates and halo getter. Cryo-treated at


Test Results


See images for detailed results and test parameters.


Shipping (free in USA only)


Free shipping in the USA via USPS 1st Class w/ DC.

Flat $25 for tracked USPS Priority International Mail.

No tracking $8 USPS 1st Class International (buyer to assume responsibility for delivery).


Why Buy?


Tested at real-world voltages on solid state tester.

Laboratory-grade accuracy with Amplitrex AT1000 tester (+/- 1%)

Free shipping with pro packing (USA only)

True matching at no extra cost

“The Best Test”


Test Methodology on AT1000


Each tube’s electrical properties are analyzed for:

Heater-to-cathode leakage, shorts, grid leakage (gas test), plate current (emission), and transconductance is measured. Results are noted on a label for each box.

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Taken on October 10, 2010