Decca Ribbon Horns - 3D printing..?

Hi All
I am tempted to try building from scratch a replica of the old Decca ribbon tweeters - though the horn loaded version.

To that end I am wondering if anybody has information on the geometry of the horn - with a view of getting it 3D printed… better still if there is an STL file for such an animal in existence – the STL file being essentially a digital 3D model of the object to be printed.

There are numerous firms which offer 3D printing around – or better still local geeks who may have a 3D printer at home….
Anybody else want to come along for the ride….?

Cheers
 

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Print size would determine if you had to do it in pieces.

I wouldn’t bother with anything but a London.

What do you plan to use as a ribbon?

deccaComp.jpg


I’d guess it is exponential.

These are a good start, i hav eno top viw but i have a picture that is not bad (needs processing, poke me if i am too yardy getting it posted

attachment.php
attachment.php


dave
 

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Hi Dave
I have a stack of neodymium magnets left over from a previous ribbon project that will be used for the motor
Ribbon will be thinnest foil I can find
I currently have a pair of 30” ribbons being used in my main speakers

Cheers