• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Headphone Amp design, Airplane hubcap

Hello!

Long time lurker here. Although I've built a few kits I'd like to build my own now. With the kits I did they all had one similar design characteristic, they all fit in boxes. I procured a unique hubcap to an aircraft. Specifically a 707. I had intentions of turning it into a clock but didn't like the idea hanging a 5lb weight from a wall, lol. The material is cast aluminum and can be brazed. The difficulty here is finding something that'll fit inside of it. It's 8" diameter x 4" deep. Flat bottom and relatively flat top with the exception of the branding "Boeing" across the top that is cast into it. I don't mind drilling holes but would like to keep it to a minimum. Ideally I would like to have the in and out connections on the sides but the question is the volume knob, it's going on a desk so putting it on the top would be kind of weird but with the curvature of the sides and the larger diameter knob I'm afraid it won't sit as flush.

Does anyone have a build that'll fit such a size case with minimal through holes (which I realize is a big ask with tubes) but this is intended to be a gift to the guy that got me interested in tube amps 20 years ago.

Thank you for any help you may provide