Replies to This Discussion

Permalink Reply by Rob on April 1, 2016 at 6:53am

Hm, thanks for all the answers guys. Honestly, i am confused now ;-). Think i will go for 1 mm and simply follow the "learning by doing" rule.

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Permalink Reply by Tom T on April 1, 2016 at 6:58am

That's what this is all about "learn by doing". It will all work out in the end. Go for it.......

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Permalink Reply by the anonymous pick on April 1, 2016 at 7:09am

covers ?  who  needs  em  ?

;-)

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Permalink Reply by Michael Fred Johnson on April 2, 2016 at 3:01am

Like that,Is that your build pick?

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Permalink Reply by the anonymous pick on April 2, 2016 at 4:14am

more  of a mod than a  build .  got the  28 national body  carcass   serial #666 off ebay ,, added a  make shift  neck  ,  and those skulls are   harley / rat  rod    light covers  ;-)

ill  sell  it  .  but  it aint  cheap  . ;-)

http://www.cigarboxnation.com/video/1928-national-666-tri-cone-reso...

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Permalink Reply by darryl kernaghan on April 1, 2016 at 5:23pm

Any beating or striking of the copper will result in indentations of some sort,it will also 'move' the molecular structure,making areas alternatively thicker or thinner,with patience,and a lot of work,you can still get a good finish,but you will need a form to work it on to get a top finish,for a form,i'd suggest finding an old compressor tank end dome of the required shape,but once you've done that it might just be simpler to use the dome as a form for pressing the copper to shape using a hydraulic jack as a press,a little bit of work setting up a lightweight frame to use as a press will be far short of the time required to dress the copper to a good finish with malletts and slap bars

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Permalink Reply by Rob on April 1, 2016 at 6:29pm

I will use a press anyway. Tried to shape a tincan lid with a hammer to a resonator. Poor result ..... Can work well with timber, but metall is a totally different story.

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Permalink Reply by darryl kernaghan on April 2, 2016 at 1:11pm

If you take the time and peen the bowl with a small bowl hammer uniformly,it not only looks great,but increases its rigidity enormously,i don't know how it would sound as an actual reso bowl though,but peened in that manner you could go down to very thin material and maintain good rigidity,which makes me think it might sound ok

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Permalink Reply by Rob on April 3, 2016 at 5:49pm

So decission is done - i ordered 1 mm copper. Will see how stiff and resistant it finally will be. Thanks to all for the good tipps and advices.

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Permalink Reply by Michael Fred Johnson on April 4, 2016 at 4:09am

If you are going to planish a copper bowl you ideally need a stake with a curved surface to support the bowl.When I did the guitar front shown earlier I used an old cobblers heel last 

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Permalink Reply by Rob on April 5, 2016 at 9:52pm

Thanks Michael, thats a great info. I saw once in India guys making brass wash pans by hammering. The stake they used was made of wood and covered with leather and i was wondering how they do to get the shape right done.

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Permalink Reply by Rob on April 5, 2016 at 9:58pm

Your right - only bad thing is that we cant sit together, fool around and have a beer (or two, ..)

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