R robertod Member Dec 6, 2022 #1 like to buy vacuum tubes; 6x5 and 6fy7. like to know some recommendations, thanks.
Paul Birkeland Moderator Staff member Dec 6, 2022 #2 If these are in the power supply of a WPL-20, I would just make sure to change them every 5 years or so and not worry too much about one brand vs. the other.
If these are in the power supply of a WPL-20, I would just make sure to change them every 5 years or so and not worry too much about one brand vs. the other.
