I found an old Plush 3000B in storage. I got it 30 years ago after a friend handed it to me as he left town. I have looked all over the net and have found photos and some info (very little out there!) but this one is truly an oddity. In small ways, it looks older than what apparently became a standard look for these babys and also has the logo in a different spot. It has seven (7) 6L6 power tubes and 3 12AX7 preamp tubes. Though it will not work without all the tubes, the center power tube of the seven does not light up much nor get very hot. Both channels work as they should as far as I can tell. Can anyone give me some good information on this unit? Secondly, it has a slight hum that does not go up in volume when either volume is raised. What can that be?? Finally, is this more valuable as it is or changing out obvious parts that wear such as the capacitors and pots? I already put in a matched set of winged SED 6L6s and Svetlana preamp tubes. I'll post photos in a day or two. Thanks in advance for any help!!