@Niner Thanks for your comments. My ascending valve Bb/C trumpet plays, feels, and sounds like a trumpet.
My comments about cornets apply to the "traditional" BBB cornet, and do not necessarily apply to the various "A" series Conns, or similar models from other manufacturers. The acid test I use when I am defining the 2 instruments is:
Is the "Trumpet" an acceptable instrument in all trumpet inclusive ensembles.
Is the "Cornet" an acceptable instrument in serious British Brass Band ensembles.
@Dr-GO What can I say? There was no quid pro quo!
When we play in ensembles which include strings, either orchestral or guitar, we often end up playing in a zillion sharps. This may be why:
http://www.jaegerbrass.com/Blo/Entries/2019/11/difference-between-string-and-wind-instruments.html
@Dr-Mark Although on 2 of my horns A flat is fingered 2 and 4!
@Dr-Mark We are getting into the can of worms area. The terms "fundamental" and "harmonics" can quite correctly be used in the way you state. However, in trumpet land both these words can have a different specific meaning: the fundamental can be the pitch that is being sounded, and the harmonics can be the notes that can be played with identical fingering. I like to use the word "formants" to refer to the range of higher frequencies that determine the color of the note. Otherwise we are teasing our brains with "harmonics of harmonics".
One versed in the art of acoustics can freely discuss acoustics matters with their (or, previously his or her!) peers, but if such an expert discourses with a layman, misunderstandings and heat are inevitable.
My advice to all is to recognize that information is available, to recognize that this information does explain some of the intricacies of trumpet playing, then pick up our trumpets and play! At the end of the day A flat is still fingered 2 and 3.
@tmd Agreed!
You might find what Denis Wick said quite interesting
First of all, the teacher does what he does; he then tells the student what he thinks he does. The student then does what he thinks the teacher said.
I am still interested in knowing the dimensions.
@Niner The part that many get wrong is blowing. Often they tense up and perform the val salva manouevre. I give them a straw and invite them to hold it between their lips and blow "spitballs".
If they have difficulty getting a note it is often helpful for them to moisten their lips.
Can't do this by written instruction or by Skype. Best to be in the same room to experience the situation with them.
@Niner I give beginners 3 things to do
Breathe
Lips together
Blow.
This seems to do the trick,
The more advanced version is
Breathe out then breathe in
Hold the lips together as if saying the letter M
Blow gently at the apogee of the breath out - breath in.
@OldSchoolEuph Well it used to work for us. Blame it on Kiwi ingenuity 
@Dr-Mark In fact the English language has a wonderful workaround for this: In order to be gender neutral it is permissible to use third person plural for third person singular.
Example:
The trumpeter produces sound from the trumpet by buzzing their lips.
Or even better:
Trumpeters produce sound from the trumpet by buzzing their lips.
Notwithstanding the noted political incorrectness, the statement is factually wrong, an alternate truth if you will. Trumpeters produce sound from the trumpet by exciting the air column inside it. This excitation of the air column will not only vibrate or buzz a sheet of paper held loosely over the bell, it will also vibrate, or buzz, the lips. The lips are an intrinsic, essential, part of the system, not the creator.
@Mike-Ansberry Because the instrument is sold, the administrator posted inviting me to delete the topic. So I did. You probably got the notification of the administrator's post - new post! But, whammo bammo, I was too slick! Disappeared right before our eyes!
@Niner Thank you, no offense taken - I've had much worse from Conducters and singers!
My workshop and I are in South Salem, NY. I arrived here courtesy of an "Einstein" visa in 2000.
Jaeger Bb and C trumpets (all bell options) are $2950. Our quarter tone Bb and C trumpets (all bell options) are $3810, and our ascending valve trumpets (only Bach bells at this stage) are $4350.
As part of our product development we examined various current and vintage models, we didn't take parts from them.
@Niner said in Reasons to collect trumpets?:
I was only expressing a doubt of his assertion on the face of it.
Not sure that I asserted anything. I wrote that some of the process leading up to the creation of the Jaeger range of trumpets involved collecting trumpets. Which is within the subject of this thread.
@Niner "We" is my wife and I plus other assorted friends and colleagues. I have a lifetime of designing, hobbyist machining, and fabrication, and managed a manufacturing company in Australia for almost 10 years.
