BAT VK75SE buzz and humming ?? help..

You can test your amp by light touching of chassis arround the input tubes with screwdriver and hear if buzz increases or you hear pops. You can also bring close light bulb. Normally BAT units will not react on light bulb brought close to amplifier but if there is a bad tube they will oscillate. That will definitely indicate that tubes need to be replaced not neccessarily input ones but any of existing.
If it won't help you'd have to get in touch with BAT and probably send your unit for service.

I had a "hum" problem a long long time ago. Victor troubleshot the problem in one call. Call Victor.

Victor has been trouble shooting it for a week, asking me to jumper the amp's inputs.. I did with no success, I jumper'ed all three pins and only pin 2/3

No success, have not heard back after my last email..maybe he is on vacation.

Anyway, is on both sides of the amps, meaning both speakers are buzzing equally.

Jfrech: I also hear it about 4ft away .. still, I don't think that this is normal...I maybe wrong, if it is, I bought the wrong amp.

So, tubes can cause this problem ?

thanks

What tubes and how old is the amp?
I assume that VK75 is not a long time in production to undergo capacitor replacements for instance. The fact is that if it "eats" tubes especially one earlier than others than definitely something is wrong.
You may want to check bias if possible. Tube oscilates when it doesn't have negative-enough grid voltage. Check an output tube manual for allowed negative voltage tolerance or call Viktor to find out and measure between the ground binding post and pin#5 with amp on and no tubes using voltmeter set to measure low-hundreds of volts.