2 x 6267/EF86 Mullard Tubes. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable. What were your tubes tested at?. Bogey(100%) = 2000 micromhos @ 3.0 mA +/- 10%.
2 x 6267/EF86 Mullard Tubes. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable. What were your tubes tested at?. Bogey(100%) = 2000 micromhos @ 3.0 mA +/- 10%.