I've made multicoils too. I made the bobbins myself as I couldn't find suitable ones. For adjustable poles I used M5 set screws, nonadjustable poles were M5 steel pole pieces. I use ceramic magnets in these pickups.
Coils are 0.752" in diameter, 0.451" tall and have 10 000 rounds of 42AWG wire. With nonadjustable poles I've made smaller diameter coils for narrower string spacings. 17mm or a bit under is doable, smaller than that gets a bit tight.
So to get me on board?
I would make 8 coils for a 4 string bass?
Wind 8 bobbins to 10000 turns??
Wire 4 in parallel, and wire the two rows in series?
The bobbins would be total 3/4 inch in diameter, and the total bobbin height is .451"?
Or is that Inside the flats?
Thanks for all the help.
I think because of all the labor involved, very few guys fool with them.
The 8 10,000 turn coils alone is pretty intense.
So I am interested in nonadustable poles.
So couold I make the poles out of 1/4 inch rod material, and let them stick out the bottom and use ceramic magnets on the bottom of each row?
Thanks so much!
T
"If Hitler invaded Hell, I would make at least a favourable reference of the Devil in the House of Commons." Winston Churchill
Terry
.451 is the inside of the bobbin. Wal pickups were wired four in a row series and rows in series or each string pair coils in series and pairs in parallel. I make the bobbins just as you described. These multicoils take quite some time to make.
So to get me on board?
I would make 8 coils for a 4 string bass?
Wind 8 bobbins to 10000 turns??
Wire 4 in parallel, and wire the two rows in series?
The bobbins would be total 3/4 inch in diameter, and the total bobbin height is .451"?
Or is that Inside the flats?
Thanks for all the help.
I think because of all the labor involved, very few guys fool with them.
The 8 10,000 turn coils alone is pretty intense.
So I am interested in nonadustable poles.
So couold I make the poles out of 1/4 inch rod material, and let them stick out the bottom and use ceramic magnets on the bottom of each row?
Thanks so much!
T
There's two styles of Wal pickups. The older version on the Pro series basses, both active and passive, had the two rows of coils in series (like the two coils in a conventional humbucker), and then those two rows in parallel for the active bass. The passive bass had a series/parallel switch.
The newer version has each pair of coils per string in series, and then all the pairs in parallel.
It's a LOT of winding! I make one version with adjustable poles that's pretty close to the real thing.
The poles thread into steel bars, and the ceramic magnets are between them. It's a lot of work.
I'm also doing a version with non adjustable poles.
It would be possible to describe everything scientifically, but it would make no sense; it would be without meaning, as if you described a Beethoven symphony as a variation of wave pressure. — Albert Einstein
I'm just messing around, thinking out loud, gathering info, and trying to come up with something that would be similar, but easier to build.
With the availability of 1/4 inch A5 Rod magnets, has anyone tried making independent coil pickups using 8 coils wound on rod magnets.
This would look more like a MM pickup, but use the 8 coils wired in series, or parallel.
Someone posted a link around here to a place that sells inductor bobbins but I'm not finding anything in a search. Belwar must have tracked down the correct bobbins or he had them made. A 3D printer might be the way to go.
Someone posted a link around here to a place that sells inductor bobbins but I'm not finding anything in a search.
Maybe it was this post from David Schwab? http://music-electronics-forum.com/t32770-6/#post305976
cycfi (the thread OP) got bobbins with surface mount terminals from Chipsen in China- but I think their minimum order is pretty high.
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