Ampeg SVT Classic is fucked.
 

I started playing my amp again, but it gets extremely staticy after 20min of playing. I havent played it in like a year before this. I took all the power tubes off and put them back on and adjusted my bias and i still have this problem..do u think i need new tubes(1.5 year old, but rarely played) or do you think its something else?

81 views and no reply? This place blows!

Hahaha, what the shit. Sorry man, wish I could help.

Speaker? Speakers can be funny, especially after long periods without usage. Been knocked around any? Some outside interference? Microwave any new electronics in the room?

My amp would pick up a radio station late in the night.