I have built from plans the 105 Wurlitzer and am adding some 125 wooden
trombones.  As unbelievable as it may sound I was able to find room in
the case for all 5 pipes.  But I have some questions if anyone can
answer.

1) What octave (frequency) are the trombones to speak?  I know they
speak one note lower than labeled, but what octave?

2) I have to miter the resonators to fit them in the case of course,
but how does mitering effect a trombone type pipe?  Is it better to
make one 90-degree miter or two 45-degree miters to make a turn?

I noticed Wurlitzer used 45 degrees in open pipes for turns but used
90-degree turns for stopped pipes.  And this seems logical as sound on
an open pipe travels out the end so a nice smooth transition using 45
degrees is more preferable to a sharp 90.  But in stopped pipes where
the sound is only at the mouth the miter angle is not as critical.
Would this logic apply to a resonator?

 [ Ideally the miter is where the (audio) air pressure is greatest and
 [ the air velocity is least.  With a stopped pipe that's near the
 [ stopper; near the middle for an open resonator.  But band organ
 [ builders seldom have ideal conditions, and so the pipes are mitered
 [ to fit them best within the case.   -- Robbie

3) I made my pipes an extra 2 inches longer until I get them voiced
inside the case.  Just playing around with them I discovered I could
not really change the pitch of the pipe by using the tuning wire.  It
was like the resonator pretty much determines the pitch of the pipe.

All my pipes are speaking about 2 notes lower than they should and all
the adjusting on the tuning wire can't get them higher.  I am
attributing this to my having the resonator too long and this problem
will go away once I start cutting off the excess as I voice them inside
the case.

The reason I ask this is I was really under the assumption that pitch
was determined by the tuning wire and the amount of exposed reed to
vibrate, yet I am discovering that the length of the resonator has more
of an effect on the pitch.  Is this correct?

Thanks for anybody who can give me some tips and pointers.  Bye

David Repanshek