Heavy Metal

June 17th, 2011

Amp Nears Completion

I keep plugging away at my new guitar amp. Because I chose to do an original chassis design, I ended up running into a lot of surprises, and they slowed me down. The next time I make one, it will be a breeze.

Here’s what it looks like without the tubes, power light, and switches.

I couldn’t figure out how to give it a nice finish. A thing like this is not easy to fly-cut. Today I decided to try a woodworking scraper and an orbital sander. WOW, did that work. The scraper leveled all the places that lifted up when I drilled it, and it reduced the scratching. The sander gave the aluminum a crazy finish that looks like Damascus steel. It has all sorts of wiggly parallel lines on it. And it only takes a few minutes to clean up the whole amp.

I have one ding that won’t come out, and there are a couple of fairly deep scratches I am too lazy to remove, but it looks great. Someone suggested an engine-turned finish, but that takes a long time to do, and it will show scratches badly. This is quick and unique, and if it gets scratched I can fix it in ten minutes.

The input jacks I ended up using are about a millimeter too big for the cavity I made for them. I did the measurement with smaller jacks. I guess I’ll have to fix that. The other jacks will work fine as outputs.

These knobs were labeled “bronze” when I bought them, but they look like copper to me. Whatever. They still look neat.

I might conceivably be able to play through this amp tomorrow. I have to get the circuit board installed and solder the connections to the pots, transformers, tube sockets, and whatever else.

The only cabinet I have is a 25-watt 12×1. I hope I don’t blow it to smithereens.

It’s going to work. Can’t wait to hear it.

I’ve been getting advice on Internet amp forums, and I can tell I’m irritating some of the people. Some think it’s cool to do a design this weird. Others seem almost offended.

I have never understood people who hate creativity, but they’re everywhere. If you’re a truly creative person, you will be persecuted your entire life, no matter how hard you try to get along with people. I’m surprised I haven’t been burned for a witch.

One Response to “Heavy Metal”

  1. greg zywicki Says:

    Are you going to lacquer it? Usually Aluminum gets dull in a few days or weeks.