51 split coil P Bass pickup

[Helmholtz]

That's what I heard and read. Like:
https://sites.google.com/site/liamsr...-pickup-design
And real PUs. Like Lundgren hot P PU. 16 kΩ, 2-3 mm higher frame (=thinner coil). No muddiness.

There is no physical justification for such claim. And if listening comparisons seem to confirm it, I suspect that the wider and shorter coil had higher inductance. Whenever evaluating the sonic influence of a change in dimensions or other parameter it is essential to wire/select the samples to be compared for identical inductivity.
Otherwise chances are that you are primarily hearing the effect of the different inductances.

If the differently shaped coils to be compared have the same number of turns and the same cores/magnets/wire size, the thinner and longer coil will have less inductance, somewhat higher capacitance and most of all less output with respect to the shorter and wider coil.

Your coil height of 13mm doesn't seem to be extraordinary, so the effects won't be too strong depending on what other size you are comparing to.

[okabass]

What makes you assume that a higher coil would reproduce more highs?

That's what I heard and read. Like:
https://sites.google.com/site/liamsr...-pickup-design
And real PUs. Like Lundgren hot P PU. 16 kΩ, 2-3 mm higher frame (=thinner coil). No muddiness.

[Helmholtz]

Higher than normal to compensate possible hi end loss (because of hotter wind).

What makes you assume that a higher coil would reproduce more highs?

[okabass]

Great, then.

BTW, why are you talking DC readings...? Do you wind to DC readings?

Sorry don't quite understand why you ask. If I rewind a PU which DCR is documented 7 kΩ, then my coal is that. If I know the turns are 10000, I wind it to 10000 turns.
If you wonder how to turn to a certain DCR value. I wind some thousand turns and then scrape the wire's insulation and measure. And there you can calculate how many turns is needed to get the right DCR value.
For example , a 51 PU : (values from memory) one turn is ca. 14 cm, and AWG 42 DCR is ca. 5,3 Ω/ meter. So 1000 turns on that PU is ca. 750 Ω.

[LtKojak]

Well, pre '57 and post '57 P pickups are totally different animals. As I wrote, I've made one 51-type split coil at 7 kΩ total, AWG 42. Can't remember the turns, but that amount of AWG 42 fits easily, no need to use AWG 43.
51-type split coil is like this: http://jlguitars.eu/shop/img/p/2/6/1...ge_default.jpg
57-type split coil is like this: http://jlguitars.eu/shop/img/p/4/6/4...ox_default.jpg

Great, then.

BTW, why are you talking DC readings...? Do you wind to DC readings?

[okabass]

The split Precision p'up is 2x10,000 turns of #42. As yours is significantly smaller, I'd say see if you can fit 9-10,000 turn of #43 as a starting point.

Well, pre '57 and post '57 P pickups are totally different animals. As I wrote, I've made one 51-type split coil at 7 kΩ total, AWG 42. Can't remember the turns, but that amount of AWG 42 fits easily, no need to use AWG 43.
51-type split coil is like this: http://jlguitars.eu/shop/img/p/2/6/1...ge_default.jpg
57-type split coil is like this: http://jlguitars.eu/shop/img/p/4/6/4...ox_default.jpg

[LtKojak]

Just making one split coil. Like to hear your opinions how hot to wind it?

https://www.dropbox.com/s/85y2g776wn...80818.jpg?dl=0

My goal is a bit thicker sound than original, but retain single coil character as much as possible. And of course noisless.
It has 20 mm Alnico 5 rods. AWG 42, and the coil space is 13 mm. Higher than normal to compensate possible hi end loss (because of hotter wind).
I wound once one to ca. 7 kΩ (2x 3,5 kΩ) . It was ok, but kind of lame.
Now I going to try more turns. What would be max turns ? My first intention is 8-9 kΩ. Is over 10 kΩ too muddy?

The split Precision p'up is 2x10,000 turns of #42. As yours is significantly smaller, I'd say see if you can fit 9-10,000 turn of #43 as a starting point.

[okabass]

Just making one split coil. Like to hear your opinions how hot to wind it?

https://www.dropbox.com/s/85y2g776wn...80818.jpg?dl=0

My goal is a bit thicker sound than original, but retain single coil character as much as possible. And of course noisless.
It has 20 mm Alnico 5 rods. AWG 42, and the coil space is 13 mm. Higher than normal to compensate possible hi end loss (because of hotter wind).
I wound once one to ca. 7 kΩ (2x 3,5 kΩ) . It was ok, but kind of lame.
Now I going to try more turns. What would be max turns ? My first intention is 8-9 kΩ. Is over 10 kΩ too muddy?