Hans [Pizka] wrote:
Question to the specialists: what was the bore of the very,
very old Conns ? Anybody knows ? In millimeters, please. To
compare: Viennese bore (inside diameter of the cylindrical
tube) is 10,8 mms.
-------
Conn horns are nominally 11.9 mm (.468") bore size. I have not worked on
8D's much, but 6D and 4D's (oldest from the mid 1940's) are usually very
close to that in the straight tubing. They typically compress down to
11.5 mm or so in curved branches, based on my experience trying to take
dents out of them.
Richard Hirsh, Chicago
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