All right I'm in.
I want to make a 7 string guitar tuned in fifths:
C (one step above a low B)-G-D-A-E-B-F# (two steps above high e of a guitar).
I roughly based the design on a Klein headless guitar ( and after that found out that this was already done
http://www.thegearpage.net/board/showth ... p?t=686151 )
Scalelength: 760 - 660 mm (approx. 30" - 26")
Stringspacing: Nut 6mm, bridge 10 mm
Two pickups: one for the bassside (C-G-D) and one for the trebleside (A-E-B-F#)
The pickups are single loop Low Z pick ups made from basic electric wire with a current transformer.
Materials:
Used / found:
The plywood are cutoffs taken out of a trashcan from a factory where they make big counters and desks.
The wire and xlr inputs are taken out of various products (long long ago).
Alumium sheet taken from an old fishtank (also long ago).
New:
Frets: $7.5
plywood used for fretboard $7.5
Tuner gears 7*$1.80 = $12.60
Current transformers = 2*$1.20 = $2.4
Danish oil = $4,-
Trussrod (needs to be modified) = $3,-