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TAD BM2 Bias Master measuring tool with 2 octal probes

The BiasMaster(TM) allows to monitor the bias current savely and easily. While adjusting the Bias control pot of your amplifier the BiasMaster(TM) does show the actual result. This lets you set and evaluate all reasonable biasing range your amp and tubes offers to find and set your personal perfect choice.

The Bias setting has a dramatic impact on the amps respsonse, break-up and dynamic character. 

Select octal adapters for the use with 6V6, 6L6, EL34, 6550, KT66, KT88, etc, or noval adapters for EL84 applications.