First off, I have to reference this thread showing Cigarman's TC-15 build. He did a beautiful job. As I'm working through this build, I keep flipping back and forth between the Trinity TC-15 Builder Manual, the TC-15 schematic, the TC-15 layout, and the Cigarman build thread on TDPRI. I also want to say how awesome Trinity is. One of the reasons I ordered from Trinity was their reputation for excellent documentation and support - which I have found to be well-deserved, and essential for a first time builder like me. Mr Cohrs at Trinity answers emails promptly and is often available to take phone calls. Their builders' manual and layout are full color and clearly illustrated with lots of "IMPORTANT" warnings that would not be obvious to a rookie. I also like how interesting Trinity's amps are. Yes, I get wanting to build a Tweed or a Plexi - they're awesome amps. But Trinity offers some amps/amp kits you don't see anywhere else. The TC-15 has two channels, one is the classic Vox AC30 top boost, and one is based on an older AC-15 with an EF86 preamp. The power section is two EL84s - basically an AC15. There's also a switch that changes the way the output transformer works and comes closer to Matchless tones. Trinity also has kits based on HiWatt and Dumble that will get a close look should I feel the need to build another amp. The story begins, in Edgar Allan Poe fashion, with the delivery of an oblong, surprisingly heavy box. Installing hardware Check the BOM and organize the semiconductors. I think it was on the trinity forum I saw someone putting all the caps and resistors into a chunk of styrofoam. Makes it easy to find them later. An option with most Trinity kits is the Voltage Regulation Module, an voltage-based attenuator that controls loudness by adjusting B+ up and down. Basically what you get is a Power Knob instead of a Power Switch. Being able to get nice tones without breaking the windows is probably the most important feature of an amp for me, so I knew I wanted to try this. If I don't like the kind of attenuation it provides, I can leave it on "max" and it's just like the amp would be with a straight up power switch. I found the VRM to be a bit of a tight fit over the power transformer. I could have installed the VRM upside down or sideways and had plenty of room, but just being stubborn, I got some nylon spacers to raise the power transformer just a touch higher and create some breathing room for the VRM. You can just see the off-white spacers under the PT in this picture. Also soldered leads on the VRM's mosfet, to make placement of the mosfet more flexible.