Tube amp help-

Marakanetz,
1. the power output is 20watts
2. the amp is a Push Pull
3. the fuse is a 250v t2a, or as the manual says, a 2amp slo-blow
4. the amp is silent upon powering up or down
5. not sure what you are asking
6. i do not listen that loud, the amp has been trouble free for over a year now.

I did speak to Nick Gowan at Tru-sound who has suggested over the phone that the type of fuse (there are 5 types), may be a factor....

I haven't had time to look into the different types, I had just bought a pack of 5 from a well known electronic parts place where I live...

5. i just re-read question your response #5, i think all is normal when i power down.....it is just when i try to re-power, the fuse has already blown....although I get no audible cues that something has occured.

Use a slow-blow type fuse. There mey be nothing wrong with your amp, Some amps with big power caps are using input relay to prevent fuse from blowing due to start-up current surge. If your amp doesn't have such relay it may have been designed to use a slow-blow fuse.
Just my 2c.

You may, in all probability, have a shorted rectifier tube. I would test or swap the rectifier before anything else. If it's not the rectifier or the wrong fuse type, then you may have to have it serviced (shorted power supply cap or output transformer).

Don't know if this will help but I was blowing fuses in my Almarro when I turned the amp on immediatley after turning it off. If I let the amp settle for 15 minutes or so, the fuse does not blow.
I'm no engineer but it's probably some kind of inductance problem.
Try turning off your amp with the source still playing so any power caps will drain.
After 15 minutes, remove the fuse to determine if it is melting after turn off or at turn on (probably a good idea to unplug amp from the wall).
This will, at least, give you more info if you decide to contact the mfgr.
Hope this helps...