The Epiphone Valve Junior tube amp is commonly known as an inexpensive tube amp, but many are surprised at just how HUGE this amp can sound with certain modifications. The folks at Indyguitarist have created a downloadable ebook to teach anyone how to modify this little amp.
Great sounds can be had for cheap - you can get the amp for $100, and the parts are a couple of bucks. Even better, if you have used a soldering iron before, this guide was written for you...no electronics experience needed. Priced at $16.99 and you can download it immediately after purchasing.
Here are some of the mods covered: