jonnytexas wrote:
I believe the tank is good since it does generate the thunderous reverb when it is moved, it is just not getting mixed into the dry signal.
No, that's not quite the case. Since you can hear the reverb tank crash through the amp, we know that the reverb tank output and the reverb recovery circuit are working. That means that input signal is not getting to the tank springs. That narrows down the issue to the reverb tank driver tube (which you changed), the tube socket and accessory components, and the reverb input cable (which you tested). We don't know if the tank input is actually working or not (the tank input can be broken while the output can work fine). Swapping the tank will tell you if the original tank is broken, or if it's an issue with the driver circuit. You might be right that the tank is fine, but you haven't actually ruled that out yet. You can also hook that tank up to your DRRI to see if it works. That's actually a better option.
It's worth noting too, that you can get continuity through an intermittently bad cable. It's always best to swap the reverb cables for a known working or new pair, for troubleshooting purposes. Also, the RCA plugs somethings need to be retensioned to make sure the ground shield makes good contact.