From the same batch of item 1013, these tubes test about 15% lower than average brand new CBS 5814WA from that era.

Brand New, Matched Pairs Rare MINT NOS Mid-1950s CBS Hytron 5814WA Long Black Plate Square Getter Tubes. 5814WA is an industrial version of ECC82 12AU7. Tubes were relabeled by National in late 1960s. CBS Hytron made 5814 is one of the best examples of American made ECC82/12AU7 types.

NOTE: Flashing pattern varies and can appear to be lopsided due to angle of the getter, even within the same batch (click Larger Photo). It is normal.

Tested and matched on Hickok 752, just recently calibrated and modified by Hickok expert to all Solid State to eliminate drift.

Matched Pair = $50. Select 2 for a Matched Quad.