Installing a new reverb tank in a Fender amp is pretty straightforward. Remove the screws, 2 RCA style plugs from the box and then reverse the procedure with the new tank making sure that you plug the input and output cables into the same jacks that they originated from.

The Blues Junior takes an 8EB2C1B Fender 9" 3 spring reverb with 800ohms/58ohms on the input side and 2575ohms/200ohms on the output side.

Ok, let's start. First off pull the connecting cables from the reverb unit and make a note of which color goes where! In the case of the Blues Junior there ia a red cable that goes to the input and a white cable for the output.

Use a short phillips screwdriver, the screws near the speaker housing are tough to reach. Remove all the screws, in this case there are (6) of them. Now you can remove the tank and put the new one in place. Replace the screws and re-connect the cables and your done.

Actually there was a simple fix for my reverb tank and probably the main reason that tanks suddenly stop working or work intermittently. After removing the tank, look for the obvious loose wire. If all wires look good, check them with a continuity tester. More than likely your will find that one or more of the wires at the end has become disconntected. This is caused by the "pinch connectors" that have little razor sharp teeth that bite into the end of the wire when the wire is pressed into the connector, oftentimes cutting into the wire itself and creating a stressed point. Once the amp is in service it may only take some vibration to actually break the wire clean off the connector. However this is an easy fix. Find the bad wire(s) and carefully clean out the bit of wire that is still in side the connector. Once cleared the old wire can be re-inserted into the connector with a small screwdriver blade by pressing it down and into the connector slot.