3 String Cadburys Tin Guitar

bouydog 8-9-8 October 21, 2011 at 3:35pm

Good job Hedley, I line the base of tins with plywood [ inside ] to stop them flexing, this may cure the problem. Really like your amp too.

Vinylhed October 20, 2011 at 7:18pm

That sounds like another option, Jon. Cheers.

Vinylhed October 20, 2011 at 7:16pm

I'm assuming that it has something to do with the frequency at which the box is vibrating. So, as the Tacoma Narrows Bridge was ripped apart by destructive resonance, the combined vibrations of the top and bottom of the box are trying to do the same.

As you can see in the video, if the back of the tin is dampened the front continues to resonate fine. I'm hoping if I glue some bracing struts inside to the bottom of the box the problem will be solved.

Jon Grinder October 20, 2011 at 7:03pm

Maybe you could glue a nice pice of tooled leather, cut to fit, on the back to dampen that resonance...

Boxy Music October 20, 2011 at 6:15pm

That's nice, I like the sound of a tin! I have made a few tin guitars. A couple had that same "horrible noise", and then out of the blue a ukulele I finished on Tuesday (not tin, but plywood) also makes that noise when a chord is strummed. Can't work out why - sorry to be ignorant, but would adding some bracing sort it out? The only pattern I've noticed is that it seems to happen on the bigger tins/boxes...

Vinylhed October 20, 2011 at 6:06am

Thanks for your supporting words folks, I'm really pleased with the sound it produces acoustically. My last tin guitar is a little quiet, but that's probably due to the thicker neck going through the box, the sound holes and pickup deadening the lid's resonance. I might try and put acoustic strings on it and see if that makes it any louder.