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There are two designs of base for this model. The base you choose depends on the type of phone you use. If your phone has a loudspeaker along its bottom edge use the iPhone base. If the loudspeaker is anywhere on the back of the phone use the Galaxy base.
Print out the parts of the base that you are using onto thin coloured card. Any coloured photocopier card should be ideal. Choose two complementary colours of card.
This project is the Mk II new and improved version of the Phono-Horn project also available on Instructables here.
It was originally published on www.robives.com
Step 1: Making The Horn
The horn is the same for both base designs. Print out the horn parts page twice on complementary colored card. Score along the dotted and dashed lines then carefully cut out the parts.
Fold over the end tabs to make a triangular section tube on each of the eight horn pieces. This gives strength and rigidity to the open end of the horn.
Pair up the horn pieces and glue together the first tab as shown. Match pieces together so that you have two pairs with extra tabs and two pairs without.
Glue the pieces together by the first tab in this alternating pattern.
Roll round and glue down the remaining first tab to make a tube.
Work your way round the second row of tabs gluing them down as accurately as possible.
Work your way to the end of the horn gluing one row of tabs at a time taking care to keep everything lined up accurately.
Glue the horn end into place. Set the horn to one side and start work on the base.
Step 8: Galaxy Base
This base, has specific markings for the Galaxy S2, S3 and S4 but is easily adaptable for all phones where the speaker is on the back face of the phone.
Glue together the two sides as shown.
Assemble the square section cross piece.
Assemble the two back supports and the phone stand.