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 cryotherm.com.
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).
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.