Victor Orthophonic Exponental Horn Design

[phononut]

Well firstly thanks for all your input. I noticed on the video of the homemade orthophonic that the sides of the horn were not curved like in the diagram. Would this possibly a effect sound quality and volume? Also I think I am leaning towards building a folded internal exponential horn but I really have to say Odeons BigBertha horn blew my mind away! I could only dream of building something like that! Does anyone have a idea of how big a good size for the horn would be? Thanks once again!

Brad

[syncopeter]

David,

Please forgive me my ignorance. As a European I'm not very much accustomed to the correct American terminology. I do know that Victor also used the 'ortho' word for its electrical recordings (although afaik they only printed it only on the label starting with the scroll series?).

[Odeon]

Some years ago, I found this picture of the model of a re-entrant horn on the net.

Sadly I couldn´t remember the side I found it...

re-entrant horn.jpg (185.73 KiB) Viewed 1757 times

In the Popular Mechanics Magazine I found this DIY Horn - also nice to fit with a gramophone I think...

1.jpg (305.6 KiB) Viewed 1757 times

3.jpg (113.01 KiB) Viewed 1757 times

2.jpg (242.82 KiB) Viewed 1757 times

4.jpg (305.85 KiB) Viewed 1757 times

6.jpg (200.25 KiB) Viewed 1757 times

5.jpg (313.55 KiB) Viewed 1757 times

7.jpg (447.23 KiB) Viewed 1757 times

[Henry]

The term 'Orthophonic' literally means 'straight sound', only somewhat ironically.

"Ortho-" derives from Greek "orthos," "correct" (adjective). "Orthophonic" means "correct sound." Note the parallel with orthochromatic black and white film: "of, producing, or having tone values corresponding to natural colors" (Webster's Collegiate Dictionary); "orthochromatic" = "correct color." Orthochromatic film, however, was not equally sensitive to all colors, specifically blue; the later panchromatic ("all color") black and white film was an improvement in that regard.