5000 Turns

[kevinT]

On average, what are other folks getting in terms of DCR for 5000 turns of 42 AWG plain enamel wire on a single humbucker bobbin.

[David Schwab]

I got about 3.92K after taping. It was about 3.87K before taping. That was for 5009 turns.

[Stan H]

3.93k for me

[madialex]

Wow, that seems a little low, what kinda TPL are you using?

[DrStrangelove]

Guesstimation program

Hiya,

My not-so-handy coil estimator program sez that
5000 winds @ 3.9kOhms on a PAF bobbin corresponds to
58 winds/layer in 86 layers @ 65.0% fill factor.

Most reported hand winds correspond with a 62-66% fill factor
in my program, not that it's definitive of anything.

The PAF bobbin dimensions I plug in are
2.225" length, 0.26" thick,0.25" high.

I'd be really tickled if the estimator was reasonably on-target.

-drh

[Possum]

bobbins....

what BOBBINS are you winding, they are not all the same.....

[kevinT]

I'm using Allpart's bobbins. Based on the tensions that i've set, instead of using TPL, i have gotten from anywhere between 4.45 Ohm DCR on 5000 turns and 3.89 Ohm DCR on 5000 turns.

obviously, i'm stretching the wire to obtain such a high resistance for the number of turns.

[PoorMan]

Closest to 5000 turns I've done is 5100. That got me 3.95k on AllParts/StewMac bobbins.

[David Schwab]

Wow, that seems a little low, what kinda TPL are you using?

What I'd like to know is, how can you tell when you are hand winding?

Count how many turns the on the counter until you cover the bobbin?

I'd only be able to see that on the first layer.

They came out in the normal range for a PAF type humbucker.

Mine were on StewMac bobbins.

[Sam Lee Guy]

How about temperlature? When warmer, get higher reading!

[madialex]

What I'd like to know is, how can you tell when you are hand winding?

Count how many turns the on the counter until you cover the bobbin?

I'd only be able to see that on the first layer.

They came out in the normal range for a PAF type humbucker.

Mine were on StewMac bobbins.

I guess you are right, I wound another last night and got 3.94.
I guess I have been doing it by hand long enough to just know how much to lay down at what speed, mind you it's not going to be the same every layer but it is very close. Also I misread the post, I thought you all were talking about full bobbins

[SkinnyWire]

It depends on the wire lot since due to tolerances the resistance per turn varies from spool to spool. I recalculate it for every spool so I know what formula to apply to custom work that's not done to turns alone.

It can also change within the same spool. The last two spools I've used from MWS have started on the low end in terms of ohms/turn and near the end of the spool crept up to midrange ohms/turn based on the tables I've kept over the years.

What bugs me more is some of the recent spools exhibit the tendency to tighten up in tension as I wind. At least for me, the norm over the years with my common friction tensioning system has been the tension lessens over the first few bobbins requiring frequent measurements and tightening down to dial it in. At some point, it's relatively stable until the felt mucks up and you have to start over. These recent spools do the opposite, tightening up significantly from start to finish of a coil which is a bigger concern to me than the other way around and they don't seem to stabilize as readily. I don't know if it's a difference in the insulation or just the way it goes.

[kevinT]

It depends on the wire lot since due to tolerances the resistance per turn varies from spool to spool. I recalculate it for every spool so I know what formula to apply to custom work that's not done to turns alone.

It can also change within the same spool. The last two spools I've used from MWS have started on the low end in terms of ohms/turn and near the end of the spool crept up to midrange ohms/turn based on the tables I've kept over the years.

What bugs me more is some of the recent spools exhibit the tendency to tighten up in tension as I wind. At least for me, the norm over the years with my common friction tensioning system has been the tension lessens over the first few bobbins requiring frequent measurements and tightening down to dial it in. At some point, it's relatively stable until the felt mucks up and you have to start over. These recent spools do the opposite, tightening up significantly from start to finish of a coil which is a bigger concern to me than the other way around and they don't seem to stabilize as readily. I don't know if it's a difference in the insulation or just the way it goes.

Bro,

Thanks for this.

I knew i wasn't going crazy. This is what was making me scratch my head. It's tight at the begining of the spool and the tension seems to weaken. That is what prompted my question about the 5000 turns. Just some crazy stuff going on. I'm using plain enamel and I'm finding that i must adjust (tighten) my tensioner in order to keep the same dc resistance for a specific number of turns. I'm using the 5000 turns as the baseline.

[David Schwab]

"5000 Turns" would be a great title to a book on pickup making!

[EtLa]

How about temperlature? When warmer, get higher reading!

and manupilation of the coil (body temperature) is anought to get higher reading. Pickups wound directly on magnet are very sensitive to manipulation due to the body temparature transfer to magnet and magnet wire.