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Permalink Reply by Jerryrig240 on April 20, 2017 at 6:12pm

keep in mind, the way this is set up right now is kinda upside down the, strapping would be bent the other way, I just had it like this because it was easier this way to test it with my diddley bow.

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Permalink Reply by darryl kernaghan on April 20, 2017 at 6:25pm

That will work Jerry, but not all that well, output will most likely be weak, getting your magnets closer to the coil will help, the flat pup concept of a 4-500 wind coil either side of the magnets, wound in opposite directions is hard to beat if you are going to go to the bother of winding a pup of that nature, for a simpler diy job, have a look at the induction type pick up, the thread is being rejuvinated at the moment, but it has all the basics there. Almost any mag pup van be mounted out of sight if you wish, some can be powerfill enough to work through the soundboard with nothing added, while others may need poles or a bar coming through the soundboard

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Permalink Reply by JL on April 21, 2017 at 12:59am

"There Are NO rules" means try something and share the results and we all learn.

and that looks like an interesting variation of the principals that a flat pickup works on. As Darryl said, the farther the coils is from the magnets, the weaker the signal is likely to be.  the field needs to go out around and back in through the core and coil.  magnetic fields get weaker by the cube of the distance they have to travel.

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Permalink Reply by Timothy Hunter on April 21, 2017 at 3:40am

that principle also relates to the distance of the string above the magnetic field. so if you mount the pickup 1/2"from the strings say under the sound board then the signal out will be 1/4 the strength of a signal if the pickup was mounted 1/4" under the strings... 

you could still mount the magnets on top of the sound board and the coil directly under them in the inside of the box. the coil would need a small piece of the strapping as a core. if the magnets are strong then the output should be strong enough...the wood of the box wont have any effect on the magnetic field..

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Permalink Reply by Paul Craig on April 21, 2017 at 8:17am

The magnets are attached to the strap that the wire is wrapped around, so the strap will act like a pole for the coil. It will work. Strength of output will depend on magnet strength and amount of coil winding. Will the disruption of magnetic field make it to the coil? Let's see.

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Permalink Reply by Ron "Oily" Sprague on April 22, 2017 at 3:36pm

Things to do differently with this design:

1) Wrap the wire completely around the magnets, not the strap.
2) The strapping is what? Steel, or aluminum?
3) Encase the magnet-wrapped wire in the presumably-steel strapping, then wire to a jack.
4) Wrap the presumably-steel strapping around the magnets. Then do your wire wraps around that. The way you have it now in the photo is the reason for the very weak signal you got.
4) Use a SINNGLE LOOP of 6 AWG wire around the round edges of the magnets, and wrap that with black electricians tape. Feed one leg of the 6 AWG wire through the center hole of a AS-104 mini-transformer, or alternatively, crack open a used wall wart, and use one of the two trannies inside for the same purpose. Wire to a jack. You have then created a version of the induction pup design, currently shown on the in-progress-of-reconstitution of the Induction Pup thread.

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