I'm assuming it's been capped including the can caps.
Could be a few things but might be a bad transformer.
Do you hear any loud static just before the fuse blows?
Tony
On 10/3/2023 3:00 PM, Jukebox Repairman via Jukebox-list wrote:
This amp will play for about 2-3 minutes then blows the 2 amp fuse. Tubes all test good. I’m confused.