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Information and Measurements

 





Model:
28D
Serial Number:
N47363
Year:
1970
Manufactured in:

Elkhart, IN
Abilene, TX
Eastlake, OH

*Lacquered:
Yes
No

*Serial Number
Location:

Lever Bridge
Change Valve Casing
Other

*Change Valve:
Mechanical
String
Converted
       to String

Bell engraving
contains the words:

C.G.Conn LTD, Elkhart, IND, USA
C.G.Conn LTD, USA (No reference to Elkhart)
Conn 8D
Other, please specify:


*Bell:

Fixed
Factory Screw Bell
Screw Bell Conversion
 

Horn has the following
(Check all that apply):

Metal Hand Guard
Finger Hook

Music Lyre Holder
Oil Hole

Bb First Valve Slide:

Straight
"Sock Foot"

*2nd Valve Pull Ring:
Round
Flat
Oval

Change Rotor is:

Tapered
Cylinderical

2nd Rotor is:
Tapered
Cylindrical


Venturi Diameter:



Venturi Depth:

Change Rotor
Top Diameter:



Change Rotor
Bottom Diameter:

2nd Rotor
Top Diameter:



2nd Rotor
Bottom Diameter:

Cylinderical Tube ID:

.472

Cylinderical Tube
Thickness:
.012

Branch OD at
Change Rotor:

.51

Branch OD at
Bell Tail Ferrule:
.65

Bell Tail OD
at Branch:

.667

Bell Flare
Outside Diameter:
12.2

Bell Flare Seam
Circumference:

"6.0

Horn Weight:

Bell Flare Thickness
at Edge:

.0195


Custom modifications:

1) laquer stripped 2) screwbell 3) nickel silver leadpipe (factory ?) with Amado water key 4) damaged 1st branch replaced with Elkhart factory part having no lyre holder 5) hand guard plate on bell branch replaced with smaller (non-factory ?) plate - - Note: all branch OD data are average as all tubing is oval cross section

 

     
   
 

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