phogi
44 posts
Sep 30, 2009
4:47 PM
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So, I tried to flatten a mb comb. It is now less flat than when I started. I did my best to apply even pressure. I was using a piece of plate glass, with 220 grit paper on it, a harp box taped to the comb, gently sliding back and forth. Now it seems less flat.
So, those out there that do this with success: how do you do it? And how do you check for flatness?
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mr_so&so
221 posts
Oct 01, 2009
8:54 AM
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phogi, your technique is good. You can check for flatness with a metal straight edge held to the comb and looking along the plane of the sanded surface.
Dave Payne has a video on this stuff (elkriverharmonicas).
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jonsparrow
1131 posts
Oct 01, 2009
9:23 AM
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i just hold my hand on top of the comb. works for me.
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ElkRiverHarmonicas
256 posts
Oct 01, 2009
11:39 AM
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If you are using an extremely flat sanding surface and your results are unflat combs, it's probably because you are applying uneven pressure down. The ultimate way is no pressure, save the forces of gravity.
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www.elkriverharmonicas.com
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phogi
50 posts
Oct 01, 2009
3:42 PM
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Dave,
I was thinking of this. I thought of rigging up some weight to go in my harp box. But I was too lazy, and just used hand pressure. It worked great and I have a super flat comb.
Next step: sealing. I have a bottle of mineral oil laxative ready to go.
So, does anyone get the runs from playing a mineral oil sealed harp? Ha!
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jonsparrow
1136 posts
Oct 01, 2009
6:01 PM
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i tried mineral oil an it didnt seem to work to well. an yes i had to poop every time after playing.
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ElkRiverHarmonicas
262 posts
Oct 01, 2009
9:53 PM
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If you're gonna use an oil that never actually hardens, maybe try one that smells good? Like Linseed maybe. I like to seal my personal Vienna-style combs with linseed.
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www.elkriverharmonicas.com
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ElkRiverHarmonicas
265 posts
Oct 03, 2009
12:35 AM
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Mineral oil with some chemical dryers in it.... a.k.a. butcher's block oil, but not the butcher's block that is just mineral oil. You want it to dry hard. Regular mineral oil will scarcely dry at all.
BUT, that's OK sometimes. I've done tremolos with Vienna combs in linseed oil, which never really hardens. It worked out pretty nice in those.
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www.elkriverharmonicas.com
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