That baby should work great. Hook 'er up and let us know what you see.
A lot of those for sale on eBay, the word "vintage" is used in the description on a few. Vacuum tube? Vacuum tubes were hard to find 20-40 years ago. I understand they now are plentiful due to the resurgence in demand for the true sound of music that only vacuum tubes can amplify. Huummm....maybe similar to nota4re's comment on another post regarding speaker cables.