How to stuff a wild Karlson - 4.3 cu.ft. of fun - some details on X15 box - freddyi

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How to stuff a wild Karlson - 4.3 cu.ft. of fun - some details on X15 box

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Hey guys - this is roughly what's seen from a beatup late 1960's Karlson X15 box which used a CTS 15 and 2" OD slotted tube waveguide - imo = fun speaker and "unique" approach.
baffle is about 23 degrees tilt, the K-tube mounts on the first refector panel which has a 12 degree tilt adn just peeks into the coupler's slot by perhaps 3/8"
port is a 2" wide cutout centered in the 2nd reflector panel and third reflector board tilted ~40 degrees accordng to my angle gauge.
If you examine the rear view of the X15 loaded with Eminence 55-795 then will see tube hole's location, five - 7/8" diameter de-Q-ing holes flanking the port (4 on port board, 1 on top reflector board).

K-Tube dimensions needed to create a paper pattern are given below for 2" OD pipe with 1.875" ID aluminum
using 2"ID pvc with larger outside diameter - have to re-calculate - alghough might be able to kludge with marker and template.

Rear View of X15 With Eminence
X15 Plan Side View
X15 Plan Front View
Concentric Tube Filter by Carl View
X15 tube by Carl View
*****************
Tube Details
There was a 1.25" OD concentric filter 1.5" long with walls ~0.025-0.030" thick. It is made from a cylinder 1.5" long sliced off 30 degrees from tip - pvc should suffice for tubes and filter.
TUBE DESCRIPTION:
From Carl Neuser we get this description:

"The X-15 K-Tube has the following dims: g = .25, d = 2.0, l = 7.125, s = 4.25. These data result in a constant A = 2.141133."
in practice the tube could be made a bit longer (maybe 7.25" overall length) for press fit into the first reflector panel
MAKING THE TUBE'S PAPER TEMPLATE
using Carl's foruma in 0.25" increments with dimension starting at the tube's "TIP" we construct a paper form of 2 times X (parabola curve) - you would mark the paper,cut with scisors , wrap paper around the 2"OD tube holding the template with a piece of tape, trace cut with saw - then you have the K-tube - note that things check with final width being 0.25" less than pi X OD - am not sure how to cut thin aluminum tubing accurately - disclaimer - I am not responsible for problems/accidents/injury - find a pro to do this work if not using pvc.

0.25"....-X=0.7316306 so 2 times X gives 1.4632612 inches
0.50".....X=1.034682 so 2 times X gives 2.069364 inches
0.75" ....X=1.267221 so 2 times X gives 2.53442 inches
1.00" ....X=1.463261 so 2 times X gives 2.926522 inches
1.25" ....X= 1.635976 so 2 times X gives 3.271952 inches
1.50" ....X=1.792121 so 2 times X gives 3.584242 inches
1.75" ....X=1.935713 so 2 times X gives 3.871425 inches
2.00" ....X=2.069364 so 2 times X gives 4.138728 inches
2.25" ....X=2.194892 so 2 times X gives 4.389784 inches
2.50" ....X=2.313619 so 2 times X gives 4.627238 inches
2.75" ...X=2.426544 so 2 times X gives 4.853088 inches
3.00" ....X=2.534443 so 2 times X gives 5.068886 inches
3.25" ....X=2.637931 so 2 times X gives 5.275862 inches
3.50" ....X=2.737511 so 2 times X gives 5.475022 inches
3.75" ....X=2.833593 so 2 times X gives 5.667186 inches
4.00" ....X=2.926522 so 2 times X gives 5.853044 inches
4.25" ....X=3.01659 so 2 times X gives 6.03318 inches this is at the initial gap.
pi X 2 - 6.03318" = 0.250005309 inches - very close to 0.25 - this is the initial tube gap.
********************
X15 coupler Slot Width (starting at top and going down in 1" increments)
Zero - initial gap = 0.5"
1" down; width = 0.46875'
2'" down, width = 0.5625"
3" down, width = 0.6875"
4" down, width = 0.875"
5" down, width = 1.125"
6" down, width = 1.9375"
7" down, width = 1.78125"
8" down, width = 2.15625"
9" down, width = 2.625"
10" down, width = 3.125"
11" down, width = 3.65625"
12" down, width = 4.25"
13" down, width = 4.9375"
14" down, width = 5.5625"
15" down, width = 6.3125"
16" down, width = 7.125"
17" down, width = 7.9375"
18" down, width = 8.84375'
19" down, width = 9.875"
20" down, width = 10.8125"
21" down, width = 11.875"
22" down, width = 12.9375"
23" down, width = 14.125"
24" down, width = 15.28125"
25" down, width = 16.53125
26" down, width = 17.75"
external box width with 3/4" material = 19.25"

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Topic - How to stuff a wild Karlson - 4.3 cu.ft. of fun - some details on X15 box - freddyi 17:35:32 07/08/03 (5)

Re: How to stuff a wild Karlson - 4.3 cu.ft. of fun - some details on X15 box - Bill Martinelli 17:45:11 07/08/03 (4)

Re: How to stuff a wild Karlson - 4.3 cu.ft. of fun - some details on X15 box - freddyi 17:59:24 07/08/03 (3)

Re: How to stuff a wild Karlson - 4.3 cu.ft. of fun - some details on X15 box - Bill Martinelli 19:33:40 07/08/03 (2)

Re: How to stuff a wild Karlson - 4.3 cu.ft. of fun - some details on X15 box - freddyi 19:55:46 07/08/03 (1)

Re: How to stuff a wild Karlson - 4.3 cu.ft. of fun - some details on X15 box - Bill Martinelli 19:30:52 07/10/03 (0)

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