I have a Heathkit SB-220 that was in storage for several years. When I turned it on, it appears one or both tubes were gassy and that took out several other componets. Well we have rebuilt her and she appears to be good to go. Now I have ordered 2 brand new 3-500ZG tubes from RF Parts to install.
Now my question is, what do I need to do to break in these tubes if anything?
I understand I should whipe down the globes with alcohol swabs to get figerprints off to prevent hot spots.
But I have also heard I should run them without the anodes attached for 24 hours and other assorted stuff to break them in.
I have retubed radios before, but never an amplifier with these type of tubes. This beast has taught be so much!!!! Ha! Ha!
What might the words of wisdom be on this endeavor?
Thanks in advance for any information.