To Vic Searle and the MMD,  In reference to Vic Searle's inquiry
as to the Caliola pipe scales: I made a comparison of a few Caliolas
against the scale lengths in the booklet published by Doyle Lane.

The width and depths of the scales in the Doyle Lane pamphlet match
those of the Caliolas I personally examined.  The lengths hand written
onto these scales are too long when compared to actual pipes.   I made
a spreadsheet of this data graphed against theoretical curves and sent
this spreadsheet to the MMD editor for inclusion in the MMD Tech
Archives.

The lengths written in the Lane pamphlet are about two inches over
the lengths of the measured pipes.  It is not like the block height
is the extra, but more like the pipes were measured as installed to
the toe board.  The attached spreadsheet compares the Doyle Lane data
against data from Tom Wilson and Bill Black.  This spreadsheet is
formatted to be printed so I can see the dimensions in the shop with
every other line having a nice gray background.  I made my Caliola
pipes to this data.

I had problems with the top octave.  I was a bit heavy handed on
the sander and the pipes came out with a rectangular cross section,
so I remade them with a square section.  What does work is to cut the
boards to the lengths printed in the Doyle lane data. If the blocks
are made with a bit of extra length in the traditional way this extra
length gets cut off and used as spacers at the top of the pipe during
construction.

I made the extra about 5/8 inch or so.  By chance or design, when this
clamping area is removed from the open end pipe, the finished pipe
falls in line with the measured data.

Caliola pipes use slab tuners.  As built to these scales, there is
about a full step in the tuning range.

Fritz Gellerman supplied copies of the original Caliola scale sticks
to the MMD Archives.  These scale sticks show the Caliola is intended
to play 1/2 step away from the notes indicated on the APP scale.
Bill Black provided me with the tubing of his Caliola which also
confirms this shift in scale, where tracker note E plays the pipe
marked F.

There is also some octave coupling to get the 65 notes of the APP scale
to play the 44 pipes.  As the Caliola pipes start with F and the APP
scale starts with A or A#, the first octave is only partly coupled at
note A (or A#)

While no Caliolas with bells have ever been recorded from the factory,
a study of these scales and actual "Caliola" rolls provides for the
top octave to play the 12 notes on bell bars.  The APP scale, provides
registers for two ranks of pipes, piano, drum, xylophone and bell bars.
This enabled Wurlitzer 165 and Wurlitzer 180 scaled organs to be
converted to play "Caliola" rolls.

Julie Porter

 [ Thanks, Julie.  I'll place the spreadsheet and this article in
 [ the Pipes section at  http://mmd.foxtail.com/Tech/index.html
 [ At http://mmd.foxtail.com/Tech/APP1.html is an illustrated article
 [ about the Wurlitzer APP tracker bar scale and how APP rolls are
 [ played on the Caliola.  The noteur's tracker bar scales are shown
 [ at http://mmd.foxtail.com/Tech/APPsticks.jpg  -- Robbie