Hey. Hopefully someone can help me out. I bought a used Rivera Clubster 25 Doce about 5 months ago. I brought it home, put it in my office and have played it everyday. It has worked flawlessly. Reverb is always on. I absolutely love this amp. Last week a friend asked me over to Jam. I packed it up (first time it has left my home). I placed it face down in the back of my car (always heard this was the best way to transport an amp, not sure if this is good advice or not) anyway, it worked and sounded great at my friends home. When I got home I put it back in my office. The next day when I played it, the reverb sounded terrible. Clanging, crashing, weird noises etc. I checked and swapped the tubes. No change. Not real sure it is a tube driven reverb anyway. I pulled the reverb tank (Ac****ronics 8BB3C1B) out of the amp, and checked all the RCA connectors and inspected the springs/connections inside the tank. Everything looked good and new. I hooked up a different reverb tank from another amp, and it worked fine. I put the original tank back in the amp, and it worked fine for a day. Then last night, same terrible noises. I took it out again, and unplugged all connections then re- assembled. It is working fine again, but I am thinking it will probably mess up again. I feel like transporting the amp, caused something to loosen, but everything looks fine. The tank looks pretty simple and appears to be in good shape, but I don't know how they work. Any suggestions?