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Formerly TheGuitarWeasel ... Oil City Pickups ... Oil City Blog 7 String.org profile and message
Well to start with part of a P90's sound comes from the fact that repelling poles are forced together on either side of a P90's keeper bar. This leads to lots of power but a less focused field ... part of the characteristic sound of a P90. So yes ... the same (in most cases north) pole of a p90 is facing outwards.
Well I don't tend to RWRP P90s as standard as I don't particularly like the slightly thinner sound they get when they run as a humbucking pair (BK do a good video on the difference if you're curious). P90s are touchy pickups to mess with on their specs so I've never tried a pair together ... as in side by side. I think they'd probably not sound that good and would be a huge waste of space
Right ... think of it like this: there is only one magnet in a PAF right? and in order to bring the field up under the strings in each bobbin we effectively make the magnet U shaped by using the pole screws. So If we take the same idea, and flatten out the U to then stand it on end with two coils on it it will still be a humbucker, just a REALLY inefficient one. The top coil will do most of the string sensing, whereas the bottom one will really only act as a dummy coil to 'buck' the hum. This is why stacks have to be wound about twice as hot as conventional single coils to get the same output. Putting all that wire on there that doesn't add to the actual volume of the pickup 'loads' the coil, and can considerably reduces the dynamic range of the pickup. This is why .. frankly ... most stacks are pretty crap.
About the only way you can get a stack to work properly is in a low impedance format, as seen on the LP Personal/Recording ... however that requires a transformer ... and it's debatable whether that 'variety' of sounds equates to the tones and output a modern guitarist looks for ... the Recording can be very Hifi and sterile (personal opinion warning !)
Formerly TheGuitarWeasel ... Oil City Pickups ... Oil City Blog 7 String.org profile and message
Formerly TheGuitarWeasel ... Oil City Pickups ... Oil City Blog 7 String.org profile and message
Incidentally I've just had the guitar looked at by Murray Torkeldson at Murray's Guitar Care and he's done a fantastic job. New bone nut, some fret work and a perfect set up means that its playing better than ever and my other guitars haven't had a look in for the last few weeks. I would say I'm almost Gas free at the moment, but that's just until I spot something in the classifieds. >:D<
A far better solution ... in my opinion at least ... for a noiseless 'single coil', is a 'split' design ... where three strings are sensed by one coil ... and the other three are sensed by a RWRP coil. Both pickups are still in use and sensing 'string', as much sparkle as possible is kept ... and the whole shooting match is quiet.
Formerly TheGuitarWeasel ... Oil City Pickups ... Oil City Blog 7 String.org profile and message
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
I have had a noiseless Tele bridge pickup on my 'prototype bench' for some while ... but I'm still not 100% happy with the compromises in tone that have to be made to achieve the holy grail of silence in a conventional package. It's no worse than other noiseless pickups that are out there on the market ... but still doesn't quite cut it for these lug-oles.
Formerly TheGuitarWeasel ... Oil City Pickups ... Oil City Blog 7 String.org profile and message
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
I tend to agree with you ... as I have, for the time being, abandoned any more 'noiseless' research
Formerly TheGuitarWeasel ... Oil City Pickups ... Oil City Blog 7 String.org profile and message
No more than you do on a P Bass. Only the hum is cancelled ... so crosstalk is not an issue. Because the coils are so close to being in the same 'plane' the tone problems associated with widely spaced RWRP pickups don't appear so prominently ... but they are still there.
And yes ... I'm with ICBM ... there's something a bit magic in that single coil 'rattle and hum' that is lost in noiseless designs.
Formerly TheGuitarWeasel ... Oil City Pickups ... Oil City Blog 7 String.org profile and message