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so i finished my first pickup and i absolutely love it. but as i have been working on my second i can't seem to do it right. i wound the bobbin almost to the edge and only had a maximum resistance of about 5.5Kohms. now i know i can get much higher than that since i'm using 43 AWG. so my question is what could be causing me to have so many wounds but such a low resistance? I've done it 3 times now and the same thing keeps happening.
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If you got the same measurement 3 times in a row with 43 wire I would suspect the meter. It would be hard to short it out at the same spot 3 times in a row but I guess anything is possible. Take a 5k to 10k resister and measure it and see what you get. -
i checked it against my first pickup, (2) 1Mohm pots, and (3) 500kohm pots and it is functioning correctly. i'm thinking it is how i'm winding my pickup itself that could be causing it to have this problem but i'm new and have no clue.Comment
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Are the edges of the bobbin smooth, maybe you are nicking the wire at some point causing the wire to break? Too much tension at some point in the wind. How do you tension? Maybe bad wire.??
ALSO what is the DCR of the first good PU? Could you possibly have 34 AWG instead of 43..Comment
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Are you absolutely sure that you are using 43? When I was ready to wind my first pickup I bought some "42" from a guy on eBay and had the same problem. After I pulled most of my hair out I had a friend check the wire with a mic and it turned out to be 38. I didn't know how thick 42 was supposed to be so I just assumed it was right. Ahhhh, them was tha days...ignorant bliss
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What we're missing here is some information about the actual circumference of the turns. That will depend on the polepiece spacing and thickness and the height of the bobbin. If I have fat polepieces with a slightly narrower string-to-string (polepiece to polepiece) spacing, then each turn doesn't use quite as much wire to get where it's going. If the polepieces are fat, then my coil starts out a little closer to the edge of the bobbin right away, leaving less space for turns. If the flatwork is pressed in too far so that the bobbin is short, fewer turns can fit on each successive "layer" of the coil and it takes fewer turns overall to work your way out to the edge of the bobbin. So, there are several aspects of what it is you are winding the wire on that would reduce the DC resistance below what you were expecting for the number of turns.
Of course, you haven't mentioned the number of turns yet, or whether your method of counting them (if one was used) was reliable. If you were simply winding-until-full, it is also possible that your wire tension is off and there is less wire on there than you think, yielding a lower DCR.Comment
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it is 43 AWG Formvar wire. the firs PU i made was about 2.98 kohms per coil. The bobbins themselves were thoroughly sanded on any spot that had any form of a burr in them. They are on the other hand very short bobbins in the height, kinda like a gibson bobbin. I do not wind to count and instead go by resistance and all of my tension is done by hand. Everytime i begin to wind i attempt ( key word since it is not possible for it to be same always ) to have the same tension as i did before by same finger placement and feel. I"m feeling though as i know a taller bobbing allows for more wounds, that most likely because of such a short bobbin i'm not capable of getting that much higher.Comment
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thats probably the culprite, is it less than 0.25" (6.34mm)?Originally posted by lordnikon View PostComment
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