RMA Tube Numbering Code

I am frequently asked to explain what all of the “letters and numbers” mean in a vacuum tube number.  In the early days of radio, tube numbers were haphazardly assigned to new tube types.  As more vacuum tube types were developed, it became more difficult for technicians to recognize any fundamental characteristics about a tube. 

RMA Tube Numbering Code Read More »

B&K 600-606 tube tester

This article discusses repair and calibration of the B&K 600 / 606  tube testers.  Both models can share the same tube setup data book, and therefore both models are functionally equivalent.    Model 606 will be example shown in this article.  Electrical voltages are present, repairs should only be attempted by a qualified technician. Copyrighted

B&K 600-606 tube tester Read More »