I replaced the Cathode R's then confirmed with a measurment, its right on to ~ 2%. I ordered the Kit in the article, and will test all the parts I extract just to see if there was actually a problem. My driver tube tests good but I have seen articles tube tester results may not always insure good operation in circuit. I will check out the rest of the signal path as you suggest. Thanks as always, help very much welcomed. Regards, Dana.