Sure, read a lot. :) Check out the thread titled useful references, it's stickied. Get a decent multi meter, you don't need a Fluke, I've been using a Klein for years, and honestly any cheapo digital will serve you fine to start out. You'll always want to make sure your filter caps have drained after turning off the amp.
Before you solder anything, build yourself a lamp limiter (google for images) and ask Sluckey for the link to his scrapbook, very useful item.
I'm not familiar with Laney amps, so don't know how easy it is to get the chassis outside of the cab. Hopefully not bad. Make yourself a cradle to hold it upside down so you can poke at the insides. I've used 4x4 pieces and just laid it on those already.
Use little alligator clips to parallel the cathode bypass caps across the cathode resistors. If you can, find a schematic for it. If you can't , tell us what tubes it uses in the preamp (I assume 12AX7) and we'll tell you what pins are what. All this is way easier and pennies on the dollar compared to replacing the OT.
If or when you measure voltages with the amp turned on, ALWAYS use a clip to connect your black lead to ground so you can keep one hand behind your back while probing with the red lead for voltages. Even if you get nailed somehow, it won't kill you. Or at least it hasn't me, yet. If the voltage goes across your chest though (from one hand to the other), you might be toast.
If it were me, I'd do some research, read a lot, look at lots of pictures and keep playing guitar through it till you feel good about opening it up. Try to find some kind of manual on it.
Be careful. I just needed to replace some caps and resistors in an old amp I had, and 5 years later, I got a milkhouse full of meters and testers and projects and iron and all kinds of stuff.
Topic: Laney lion heart l20h output transformer upgrade? (Read 8156 times)