Washing Up Bowl Guitar Amp

Here's another amp based on runoffgroove's wonderful Ruby - http://www.runoffgroove.com/ruby.html.
The Ruby amp is great for knocking up cheap and cheerful creations when an idea strikes to build an amp out of something you've got lying around - a washing up bowl in this case - perhaps more accurately described as a tub, given the shape?
A side benefit of this kind of activity is always discovering something new that can be applied elsewhere. A bit of trial and error with the construction led to a new idea for covering/surfacing things that might be put to good use on other builds - perhaps a guitar or some furniture. Anyway, hopefully the pictures speak for themselves, with a few notes here and there.

A washing up bowl on legs with plywood face.

Retro style legs from an old clock resembling a TV, drawer handle and 9 volt socket affixed to bowl.

Ruby circuit and speaker mounted on fabric-wrapped plywood face.

The speaker grille is a rigid, fibrous mesh used by gardeners for potting. It's lacquered to the fabric-wrapped wood and the whole thing lacquered some more.

The look of yesteryear, the smell of tomorrow (or sometime in the future when the lacquer finally cures for good).

Turned out looking quite neat. I will use the lacquered fabric technique again.

The control panel. Prepared in Inkscape using dials generated with Scale Generator. Lacquered to a ply panel.

I suppose I should post some audio or video files to demonstrate how it sounds but that will have to wait for now.

Rotary Speaker - update

Some update on the rotary speaker project.

I finished the enclosure and decided it needed covering.

Blue vinyl table cloth.

Control panel - photoshop, printed on paper and laquered onto box.

I need to clean up the front a little. I have a temporary plastic grill in there until some wire mesh comes my way.

It's looking a bit 'Toys 'R' Us'.

I need to wire a socket for the power supply. The pot on the back sort of fine tunes the speed. One control would be better, but until I can build a proper speed control, this allows slower speeds. I did build a very simple PWM circuit but the motor actually makes too much noise as it pulses on and off. so either I need a more sophisticated circuit, or an enclosure to silence the motor? Anyway, at this stage it works as required, so aside from a few cosmetic jobs, it's more or less finished.

Audio/video to follow

rotary speaker

Been working on a rotary speaker project.

I spent a while experimenting with drive bands and pulleys before settling on a coffee cone/dripper attached directly to the shaft of an old motor from a tape deck.

A paper cone sticks out the side of the coffee dripper

A sawn-off funnel over the speaker channels sound into the coffee cone spinning above.

Using an old Fostex speaker.

I'm now thinking about how to finish the enclosure and mount the controls. I have a PC fan controller to adjust speed but it only has an affect from 12V down to about 6V - it needs to go down to about 3V for slow rotation. I might build a PWM circuit to control the motor.

Here's a video test drive: