Friday, September 30, 2022

Trumpet Mouth-pipe Reattached

The top tube of this main tuning slide was really stuck.
Somebody, in there attempt to free the tuning slide,
managed to rip the entire mouth-pipe off of the instrument.  

Fortunately, I was able to free the stuck slide rather easily.
After using fine sandpaper to clean the tuning slide tubes,
I greased them up and began my mouth-pipe reattachment
by using the tuning slide as a jig to properly
realign the mouth-pipe to the trumpet.  
Not too bad!  However the mouthpiece receiver is a little low.
I started bending and twisting the mouth-pipe and S-braces to proper realignment using my hands and Knipex plyers. 
                                          

Mounting the trumpet on my soldering jig, I continue to
 realign in preparation for the reattachment
of the the mouth-pipe to the trumpet body.

A new casing-to-mouthpipe cross brace has been transferred
from the parts bin to it’s proper place between the casing and the mouth-pipe
and the S-braces have been reshaped and put into place using solder clips.
 Let the soldering commence!

Here’s my soldering job on the new casing to mouth-pipe cross brace.

Here’s my soldering job on the new casing to mouth-pipe cross brace.

Mouth-pipe to bell S-brace.

Mouth-pipe to bell S-brace.

Mouth-pipe to bell S-brace at mouthpiece receiver.

Mouth-pipe to bell S-brace at mouthpiece receiver.

The right pinky ring is a little misaligned 

That is corrected using my Knipex pliers.  I’m taking a chance here.  
The solder joint which holds this hook in place
may break requiring me to go back to the solder bench to reattach it.
 Fortunaely, that did not happen.

Reattached!
I still feel that the mouthpiece receiver end of the mouth-pipe is a little low.
I took the trumpet back to the bench peg,
inserted a mouthpiece to help me carefully
bend the mouth-pipe back into realignment.

Now it’s time for reassembly.  There are several missing items:
Valve buttons; valve caps; top felts; upstroke felts; two valve springs.

With a short trip to the shop’s parts bins, I have what I need
to complete the reassembly of this trumpet.

Now it’s ready for a student somewhere in the U.S.A!


 

Saturday, March 5, 2022

A knuckle patch on a student trumpet

                                                After working out a dent in this trumpet casing 
                                              knuckle, I noticed a small crack in the brass.  I 
                                              proceeded to use my poker to press against the crack 
                                              and it poked straight through.  Time to make a patch!
                                               I chose to make the patch from a second valve slide 
                                               I had in my spare parts drawer.  The patch was cut 
                                              out with a band saw and then shaped with a belt sander.
                                              I scratched away all the lacquer on the knuckle and 
                                              also scratched cleaned the inner surface of the patch.
                                              Each surface was then wiped down with denatured 
                                              alcohol to ensure clean surfaces.  Solder will not adhere 
                                              to lacquer or dirty surfaces.  
                                              First I loosely place the patch onto the knuckle to 
                                              check the fit.  
                                              Here it is soldered in place.  The area has 
                                              been buffed to shine and cleaned.

                                              Ready to be played a little more!
 

Lathe work: Brass Valve Caps