Mazda 6V6GT vacuum tube gray glass matched quad (4) AT1000 Tested

Description

The 1953 Mazda 6V6GT tubes in this precisely matched quad (4) have
gray glass
and bottom getters. The white print on the glass has the Mazda logo and says "Made in France."
All four tubes are tested on the Amplitrex AT1000 tube tester. They are screened for shorts and excessive leakage, gas, and noise / microphonics. They are matched for both current draw (mA) and transconductance (Gm) at typical operating conditions. They ship in their original boxes with test results.
These tubes are sold as a matched pair (4 matched tubes). Larger matched quantities are available by request.