The average bias job costs $40 - $60. Build your own bias adapter with this Weber Bias Rite Head kit and you'll save money every time you set the bias on your amp.
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.
We are not stocking this item any longer. TubeDepot will have a comparable bias tool soon.