OK - so I bought and assembled one of those little, cheapo 14-watt amp kits on eBay. I figured for $25 I might learn a little before maybe tackling something more substantial. After figuring out the values of all the resistors and caps, it soldered up pretty nicely and looks appropriate. And overall, it really sounds pretty good with my Tele. Of course, there are issues that may make it unworkable. I just need some ideas where to start troubleshooting. Here’s what I got: 1. The small blue LED does not light up. I assume it should. 2. There is a fairly significant hum when it has power running through it. I know that with some setups grounding occurs when you touch the strings on the guitar, but that has very little impact on the hum. What does have an impact it touching the Bass and Treble pots which significantly increases the hum. I’d like to get rid of the hum, but I really don’t know where to start. I believe all the wiring and connections are done correctly (+ to +, and cap orientation). The speaker sounds fine when other amps are run into it. Any suggestions where I might begin looking? Thanks!