1803B horn plans available?

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Originally Posted by GM

Here's what I use for such measurements, but sure wish mine had been this price back in the '60s when I got mine. :( 6 Piece Telescoping Gauge Set

GM

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Nice GM ! And only $15 that is a cheap price for those..

Profile gauge | Ask.com Encyclopedia
Or use one of these on the outside surface of the cell. It still won't help calculate the cut pattern of the actual piece.

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Originally Posted by VolvoHeretic

I am not a member of diyAudio, so can't open the files.

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It's free to join. Many people do just to see the photos.

It appears the pictures in Petter Persson's build thread are back...

The construction of a multicell horn - diyAudio

Thanks to Pano and... darkstar?

help me out here Michael.