Quote Originally Posted by daruby View Post
This is a HP horn with an LP extension on the leadpipe tuning slide. This is quite visible in the first two pictures above. The extension is under the leather belt in the 1st and uncovered in the 2nd. Getting the horn to play in tune is a process that will take some time. Each of the 4 valve loops (1-4) then have to be pulled out and tuned to a reasonable pitch for A=440 slotting.

The good news is that with the tuning slide in the leadpipe, you tune the horn once rather than tuning the large and small sides separately. The bad news is that the "leadpipe tuning" horns usually don't sound as nice since the cylindrical length of tubing is greater and the connical doesn't start until after the 5th valve.

Thank you.