Epiphone Valve Jr: adding an 8 ohm output

I only found hints and brief mentions about modding a Valve Jr combo for 8 ohm output. So here's a step by step.

Disclaimer: Tube amplifiers are dangerous. It's quite possible that a lethal voltage remains in the capacitors for weeks. Don't do this if you don't know anything about amps.

Ok, got that out of the way. So the output transformer in the combo version looks like this:

The 4 ohm output to the internal speaker is wired to the brown and black wires. To add an 8 ohm output all you have to do is stick in a jack that's wired to the red and black wires. That's it!

That's what the standard jack is wired to. Note the red wire that isn't connected to anything. Epi was nice and left plenty of wire so anyone could use it if they wanted to.

Here's what I recommend:

1. Install a 1/4" jack in the back of the amp close enough to the 4 ohm output that the red wire will reach it.
2. Solder the red wire to one terminal.
3. Cut the black wire in two. Strip both ends of the cut.
4. Run a heavy gauge (18 AWG speaker wire should be fine) wire from the free terminal on the jack to both ends of the black wire. Twist all three conductors together and solder.
5. Put some electrical tape over any exposed conductor and box that bad boy back up.

That's all there is to it. You can test it by running the 4 ohm internal speaker briefly using the 8 ohm output. Now you can drive an 8 ohm cabinet for when you need a bit more oomph.