This kit includes all the parts to build a single octal socket Weber Bias Rite head. Used with a basic multimeter (Get Yours Here), the finished adapter will allow you to measure both cathode current and plate voltage of a single tube position.

We recommend purchasing two of these kits so you can easily monitor both halves of a push-pull circuit.

Note: this adapter, as designed, will NOT test 7591 tubes.

Download the complete assembly instructions.