This Brimar 12BH7 (branded for International) is in great shape and features black plates and a big round getter. Minimum transconductance (Gm) on the Amplitrex tester is 2.2 and NOS tubes typically test around 3.1. This tube tested very well at 3.4/3.8!
TESTING: The tube(s) in this sale have been tested on an Amplitrex AT-1000 tube tester (fixed-bias mode), which is a laboratory-grade tester capable of supplying the user with precision measurements. It tests for heater-cathode leakage, gas, mutual conductance, and plate current. Please note that no tube testers are identical and my test results will likely differ slightly from yours.
RETURNS: I will gladly take your tube(s) back for a full refund if you're unhappy for any reason. Yes, it's that simple! Please note that I reserve the right to issue partial refunds if tubes are missing, damaged, or without original boxes (when applicable).
OTHER TUBES FOR SALE: I have many premium tubes for sale and will combine shipping if you buy multiple items. Click the links below to see what else is available!- Audio Preamp Tubes (12AX7, 12AY7, 6SN7, 6DJ8, etc)
- Audio Power Tubes (6V6, 6L6, 6550, EL34, etc)
- Audio Rectifier Tubes (5Y3, 5U4, GZ34, etc)
- Radio Transmitting Tubes (6146, 811A, 3-500Z, etc)
- Other Tubes and Accessories (eye tubes, Nixie tubes, CRTs, sockets, etc)
- Wholesale Tube Lots (buy in bulk and save... great for resellers!)