Bias adjustement pots.


What is the best way to check the correct performance of the potentiometer(s)?
Convert?fit=crop&h=128&policy=eyjlehbpcnkioje0ota0nzizotmsimnhbgwiolsicmvhzcisimnvbnzlcnqixx0%3d&rotate=exif&signature=6894cdd170854cfef73ffcf78006c6d18f6cfcab65ddb8fafb3db7464da77b39&w=128marakanetz
See the article by Dejan V. Veselinovic
http://www.tnt-audio.com/clinica/bias_e.html
appreciate for interesting article!

less-likely the DC-component may be from the tube amps due to the damaged trim pot since they have an output transformer.
on the other hand I can test the quiescent output directly before the transformer and see if it's present there.