Making a 12AX7 substitute from two subminiature 6247 triodes
I have a handful of these 6247WA subminiature triode tubes that I bought way back when I was getting interested in tube electronics. They were very cheap, and thus good for experimenting with when I didn’t have a clue what I was doing. Now that I’ve graduated to more common and more expensive tubes, I’m […]
Custom 1×8 combo tube amp: build log #3, finished!
I’ve started putting together the electrical parts of the amp. This is where the real fun begins! This log is going to be rather picture-heavy if I can help it, with explanations placed where pictures are worth too few words. First comes the power input section. The power transformer gets mounted in its holes, as […]
Custom 1×8 combo tube amp: build log #2
The transformers for my amp project arrived a couple weeks ago, enabling me to move forward with construction. The first thing I did was find a suitable location to mount the power transformer. This turned out to be exactly on top of where the old power transformer was mounted. The hole the old transformer lived […]
Custom 1×8 combo tube amp: build log #1
Some weeks ago I decided to build a tube amp. I wanted something simple, with few parts, that sounds good. I decided to work from the AX84 P1-eXtreme amplifier design. I considered buying a metal chassis for the head and then building a wooden head enclosure and wooden speaker cab by hand. I figured it […]
Homebrew rackmount tube guitar preamp
I play guitar, and I have wanted a tube amplifier for quite some time. However tube amps are expensive and complete amp DIY builds can be tricky if it’s your first time. So I decided to do the next best thing by building a standalone preamp. This takes advantage of the fact that I already […]