Lansdale Tube Company 5963 / 12AU7 / ECC82 Vacuum Tube Valve Industrial-Grade For Your Univalve Or Bottlehead February 19 2024 new in box Telefunken DL92

new in box Telefunken DL92 tube tested to spec on our Paul Hart-calibrated TV7/U

new in box Sylvania 50Y6GT tubes tested to spec on our Paul Hart-calibrated TV7/U

There is no transconductance reference reading on this tester

This pair of US-made

Lansdale Tube Company 5963 / 12AU7 / ECC82 Vacuum Tube Valve Industrial-Grade For Your Univalve Or Bottlehead February 19 2024 new in box Telefunken DL92This Lansdale 5963 12AU7 ECC82 dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and it tested as follows: 77 72 where minimum (65%) is 50 50. This tube has steel support rods; a top, square, corner anchored getter; an acid etched bottle; gray plates with two rectangular holes per plate and good flashing. Landsdale was the in house tube manufacturing division of Philco. In the