Re: [Harp-L] Comb test, flat test

[Matthew Smart <matthewsmart@xxxxxxxxx>]

Scott Hetrick, a machinist, made me a perfectly flat piece of tool steel 
the size of a comb. I place the comb against the tool steel and use my 
light box to see if any light shows in between the comb and the steel. 
Its the same effect as installing it into a harp and looking for leaks.  
Obviously you cant test a recessed comb that way, I neglected to mention 
that. My test was on flat sandwich style combs made by every manufacturer.

You can also place the flat edge of the comb on a flat surface and see 
if there is a sticky or vacuum effect.

Good question!

Im done with this debate. Im going back to eating egg nog ice cream and 
watching football.

Nite!

You can also place the flat edge of the comb
On 10/28/2012 6:30 PM, Robert Hale wrote:
> On Sat, Oct 27, 2012 at 3:37 PM, Matthew Smart <matthewsmart@xxxxxxxxx 
> <mailto:matthewsmart@xxxxxxxxx>> wrote:
>
>     Nearly every one failed a flat test.
>
> Matt,
> can you describe the flat test?
>
> Robert Hale
> Spiral Advocate
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