[Trombone-l] Old Conns

[Eric & Candice Swanson]

Elliott Moxley wrote:

>Are you sure about Allied? I had a old 78H slide come apart from red rot.
>(I bought it WELL used, I might add). One of the better shops in the NY
>area could not get a lower slide tube. The repairman even showed me the
>Allied catalog.  Not listed-  
>
>This was about four years ago, BTW.   Maybe things have changed?  That .522
>is an odd size; most of the other horns in that general size are .525.
>
>
>  
>
> Dave and Pam Sherman wrote:
>
>The latest allied catalog lists the Artist Model 78H.  Inside slide .526 
>X .554.  It also lists the outer slide tube.  Was the 78H made in two 
>different bore sizes .525 and .522?
>


Dave's right.  The brand new Allied catalog (No. 6-06) lists an inside 
slide tube part #K608 as fitting the 78H.  It's actually a King part for 
the 607F and the 3B+.  But below that on the slide chart is part 
#C-65962-3 which is a Conn 50H part that has the same dimensions and is 
1/2 inch longer (28-3/4").  I think I'd use the Conn 50H part because I 
remember the old 78Hs as having very long slides on them.

All the old catalogs used to list the 50H and the 78H/79H as .522" 
bore.  Some years back, after the 78H was discontinued, the 50H suddenly 
appeared as a .525" bore in the catalogs.  The horn didn't change.  I 
think it was a marketing decision to help sell the horn.  It was 
competing with Bach and Yamaha horns that were .525" and Conn didn't 
want to loose sales over .003" in bore.  All bore sizes seem to be 
approximate anyway, and open to interpretation.  Allied measured the 
bores, I guess, and lists different bores for a lot of our favorite horns.

A few examples:

2B:  .480/.489  instead of .481/.491
6H:  .501 instead of .500
3B:  .509 instead of .508
Bach 36:  .530 instead of .525
Bach 42B:  .545 instead of .547
88H:  .545 instead of .547
King 4B:  .550 instead of .547
Bach 50B:  .560 instead of .562

So you might want to measure the O.D. of the stocking on the 78H to be 
sure, but either of those parts should fit according to Allied.  You 
might want to measure the length too.  They might be a little short for 
a bottom tube, but still useable and better than nothing.

Eric Swanson