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What is the Cheapest SingleCoil & Humbucker you know?
- Thread starter nyxynyx
- Start date
169. As a hobby I wind coils and I count exactly the same number of turns but the reading on my coils are different. What can cause this? Jesse Harley-Birmingham, England
There can be several factors that can give you different DC resistance in your pickups.
Most likely your hand winding the coils where you guide the wire onto the bobbin being turned by some mechanical device such as a variable speed motor like a sewing machine motor with a foot pedal.
1. Hand winding can cause the magnet wire to be stretched do to improper winding tension. As the wire is pulled too tightly the diameter of the wire can become thinner adding to the increased DC resistance.
2. The layering of magnet wire can be inconsistent from coil to coil.
3. Winding too fast can cause the magnet wire not to seat properly from turn to turn and may even become spongy.
4. Winding with too much tension can cause the walls of the flatwork to flair and lift on the ends of the pickup.
5. Winding with too wide a traverse can also flair and distort the bobbin.
6. The number of turns can be the same but if the coil is distorted when winding, the shape of the coil will effect the DC resistance
7. The quality of the magnet wire being used and how it is de-spooled from the reel can cause problems when hand winding coils.
8. Poorly made or cheap surplus magnet wire can have bad insulation with what is called pin holes in the film insulation. The insulation can be cracked, scraped or pitted which can cause oxidation and breakdown in the copper wire. Magnet wire can be continuous when winding but inside the insulation the magnet wire can have oxidation making the DC resistance fluctuate.
9. The edge on the spool of magnet wire can be sharp and scrape the protective insulation off the magnet wire as it’s being wound onto the bobbin. This can cause the resistance to be inaccurate especially from coil to coil. With insulation missing from the magnet wire, a number of turns can short out with each other. This would normally lower the DC resistance if you notice this happening.
10. When winding I use a whisker disc. This helps keep the magnet wire from flying off the spool too fast. It keeps it within the boundary of the winding spool.
11. Layering of the magnet wire is very important too. If you wind back and forth too fast there tends to be too many minute air gaps. Winding with a slower traverse helps fill in the many voids and gives the pickup better consistency.
12. Winding too fast, too much tension can crack the insulation and cause the magnet wire to touch the rod magnet pole pieces when winding Strat or Tele style single coil pickups. The magnet wire is wound directly against the magnet pole piece and having insulation break down the coil will fail in time.
Always take your time when winding, be consistent and keep notes of everything you do. It will help you become a better winder and repairman.
*from Seymour Duncan Website*
There can be several factors that can give you different DC resistance in your pickups.
Most likely your hand winding the coils where you guide the wire onto the bobbin being turned by some mechanical device such as a variable speed motor like a sewing machine motor with a foot pedal.
1. Hand winding can cause the magnet wire to be stretched do to improper winding tension. As the wire is pulled too tightly the diameter of the wire can become thinner adding to the increased DC resistance.
2. The layering of magnet wire can be inconsistent from coil to coil.
3. Winding too fast can cause the magnet wire not to seat properly from turn to turn and may even become spongy.
4. Winding with too much tension can cause the walls of the flatwork to flair and lift on the ends of the pickup.
5. Winding with too wide a traverse can also flair and distort the bobbin.
6. The number of turns can be the same but if the coil is distorted when winding, the shape of the coil will effect the DC resistance
7. The quality of the magnet wire being used and how it is de-spooled from the reel can cause problems when hand winding coils.
8. Poorly made or cheap surplus magnet wire can have bad insulation with what is called pin holes in the film insulation. The insulation can be cracked, scraped or pitted which can cause oxidation and breakdown in the copper wire. Magnet wire can be continuous when winding but inside the insulation the magnet wire can have oxidation making the DC resistance fluctuate.
9. The edge on the spool of magnet wire can be sharp and scrape the protective insulation off the magnet wire as it’s being wound onto the bobbin. This can cause the resistance to be inaccurate especially from coil to coil. With insulation missing from the magnet wire, a number of turns can short out with each other. This would normally lower the DC resistance if you notice this happening.
10. When winding I use a whisker disc. This helps keep the magnet wire from flying off the spool too fast. It keeps it within the boundary of the winding spool.
11. Layering of the magnet wire is very important too. If you wind back and forth too fast there tends to be too many minute air gaps. Winding with a slower traverse helps fill in the many voids and gives the pickup better consistency.
12. Winding too fast, too much tension can crack the insulation and cause the magnet wire to touch the rod magnet pole pieces when winding Strat or Tele style single coil pickups. The magnet wire is wound directly against the magnet pole piece and having insulation break down the coil will fail in time.
Always take your time when winding, be consistent and keep notes of everything you do. It will help you become a better winder and repairman.
*from Seymour Duncan Website*
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