This tube is a 12BH7 RCA preamp tube. Grey ribbed long pewter ladder plates with a halo getter. this Tube was tested on the Jackson model 103 where a typical NOS Tube will have a test result of around 38-40 and the minimum good value is 25.
Item Tag: 12BH7
Pair 12BH7 unbranded Vacuum Tubes, Triplett 3444 Tested – will combine shipping
Vacuum Tubes. ‘Matched’ refers to comparing the gm test results between the lowest to the highest of the identical sections of a set of tubes. ‘Matched’ I consider to be within 10%. Tubes will generally be cleaned.