A new article has been released on the Tronola Website featuring the testing of audio output tubes. The method described differs from the usual “tube tester” approach, by actually powering the tube under normal operating conditions, measuring the power output achieved, and comparing it to a standard. This will yield a more accurate appraisal of tube condition and remaining life, than a tube tester alone can.
http://www.tronola.com/html/testing_power_tubes_with_lab_e.html
Also released is a new addendum to the previous “7591” testing article. The additional material features an assessment of the relatively new Tung-Sol 7591 from New Sensor Corp. and compares it to other original and currently available 7591’s.
http://www.tronola.com/html/7591a_tubes.html
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