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Aluminium Pickup tester 2

This one uses an aluminium coke can.
The small coil connected to a screw that has a rubber foot to the aluminium.
On the diagonal opposing side a small Ni magnet is placed in a hole. At the base of the coil is another small Ni magnet.
these are rigged to attract ie N -S etc diagonally across the aluminium.
This seems to work via vibration from the body maybe shaking the coil. If you tap the aluminium you get quite a loud tap via the pickup. There is some interference so the front split may need to be reintroduced. But it works!.
I have no real idea how, as if you lift it from the guitar its quiet. So vibration is a key part which is not typical of a standard electric pickup. And on this one the earth is not essential.
How does it sound ?

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Comment by BUGGY (C) on July 22, 2013 at 2:23am: It worked out it was a vibrating magnet on a spring arm
Works a magnetic pickup by vibrations from the acoustics vibrations.
Bugman vibro coils.

Comment by Mr.melo on July 22, 2013 at 12:00am: I liked it:)

Comment by jabes on January 24, 2012 at 6:50am: power to your elbow...fab

Comment by BUGGY (C) on January 24, 2012 at 3:48am: Good test will stick it on a nylon strung
To try later

Comment by jeff maurer on January 24, 2012 at 2:54am: so would this work whether you use bronze, steel, or nylon strings?

Comment by Low Budget Luthier on January 23, 2012 at 4:15pm: pepsi might sound better'

Comment by Clock The Wolf on January 23, 2012 at 2:43pm: Well, it's sure got some mean old swamp-tone going there...

Comment by BUGGY (C) on January 23, 2012 at 12:27pm: Yes will try each item pice by piece till I figure this out

the coil on its own just covers one string as an electic device, so wouldnt do this job without something extra.

and if you lift this lot off the body you lose most of the volume.. so I think it is probabbly a vibration thing ...

the coil is a buzzer coil.... so...in reverse it should convert vibration to electricity?

Comment by BUGGY (C) on January 23, 2012 at 12:20pm: I took out the Diagonal Ni magnet and it makes little difference, so i'm begiining to think this Buzzer coil might be picking up the guitar vibrations somehow, and the magnetic signal......I might just have invented a new form of guitar pickup!!!

(The old guitar is a dexian shelf fronted, old parlour guitar I made a while ago... with a 30's solid brass bridge! raised on wood to clear the nasty little pickup tester)

Comment by JUJU on January 23, 2012 at 12:12pm: Nice experiment keep it up - once i have some spare time i'm going to have a play around with the alloy pickup setup

yes i guess it works on vidration rather than a electrical field like a regular pickup - aluminium is and has been used as reso cones for years because of its tonal quality so i guess this is working in the reverse order

have you tried using the magnets on there own and the electrical coil - or in other words use both the magnets and the coil but have the coil seperated from the magnet because thats what the lace alloy pickup seems to be set up as - the coil looks like its just used to boost the signal