Hello,    New amp I procured and I am hoping to get some Q's answered regarding. 

It did not come with a footswitch and being new to all of this I do not know why I need one or which footswitch to get ????

Also, I was told by the original owner that it is quite than it used to be and may need a new tube.   Also do not know which way to go with this ...   

Last point is when switching over from clean to overdrive it is buzzing and I am not sure why...

After hours on youtube and reading the instruction manual I am even more confused. 

Thanks in advance for comments/advice. 

Wade