Tube Guitar - "Tube-tar"
The natural extension of the Rubber Band Box Guitar, the Tube-tar is a
much more satisfying string instrument.
You Will Need:
A Tube:
a good sturdy cardboard tube, not like a paper towel tube, but one with
thick walls, like a mailing tube or a rug tube. The best tubes can be gotten
either at a rug store or a fabric store. They should be happy to give them
to you, after all, it costs them money to have them hauled away! My local
rug store is used to me visiting them once in a while to take some of the
cardboard bounty...
The ideal tube dimensions should be around 30" long, 3" diameter and with
walls 1/8" thick. But in reality you can fool around with anything that
is study enough to withstand the tension of the strings.
A Tuna Fish Can
Catfood cans should work just as well. Remove the top, and then please
wash them......
A Small Block of Wood
The ideal piece would be 2" tall, 2" wide and 1" deep, but anything that
will fit inside the bottom of the tuna can will work.
Fishing Line
The best is 60 or 80 pound test, which I guess is used for catching, like,
sharks, or volkswagons (I know nothing about fishing). Smaller gauge fishing
line is ok, but will have a softer sound (because there's less stuff vibrating).
PROCEDURE:
1. Using a sharp, non-serrated knife, cut 3 small slits at one end of the
tube. They should be about 1/2 apart and about 1/2 inch long. Cut three
more slits on the other end of the tube.
Cut three lengths of fishing line, each around 6-12" longer than the
tube.
Tie a knot in the end of one of the fishing line strings; double it
if necessary. The whole point is to have a big enough knot so that it can
be anchored in the slit (see below).
Anchor the string inside the tube by slipping the string into the slit
with knot inside the tube.
Repeat the process at the other end of the tube, making sure that the
string has the correct tension:
Repeat the process for the other two strings: tie the knot, slip it
in the slot, tie the other end. At this point you should consider making
some strings slightly tighter than others, so that each string will give
a different pitch.
Once you have finished with the strings slide the can under the strings
with the open end facing the tube.
You will probably notice that the strings are not quite tight enough
to make good sounds.
So, slip the wood block under the strings on top of the can and then
rotate the wood upright so that it makes a kind of bridge.
NOTE: You may have to adjust the tension of the strings to get just
the right notes. The way to do this is to make a series of small knots
on the strings and experiment as to just which knot gives the string just
the right tension.
To Play:
You can pluck the strings with your fingers or strum it with some kind
of pick sort of thing (a penny is acceptable, although stiff plastic is
better). You can also change the tension of the strings (tighter = higher
and looser = lower) by playing like a brazilian berimbao or a japanese
koto.
Play the longer set of strings while pushing on the strings on the other
side of the bridge. The more you push, the higher the pitch.
Have fun with your tubetars.
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