Archer_of_Fish
New member
Re: seth seems more noisey than my other hummers
I don't buy it either. It doesnt seem logical.
Thames said:
I don't buy it either. It doesnt seem logical.
seth seems more noisey than my other hummers
- Thread starter Clawhammer
- Start date
bryvincent
New member
Re: seth seems more noisey than my other hummers
it is more noticable on electrically noisy environment.a2s are only slightly noisier than the a5s. but both are very noticeably noisier than HBs with ceramics. try it yourself, put an a2 HB in one position and a ceramic HB on the other, the diff. in noise levels is very obvious when you flick the switch. it seems the weaker the magnet the noisier the pickupArcher_of_Fish said:
Marcel
New member
Re: seth seems more noisey than my other hummers
ok i'll try to explain: why weaker magnets hum more then stronger
But it's just my theory
The noise from the windings is cancelled in first order of the humbucking effect. But if you have an electromagnetical field E (electrical field) and
H (magnetically) field are changning with time.
The changing of H causes a changing of B:
B=µ0 (H + M)
The changing of B causes a "voltage":
U = - d/dt (int_A B * dA) ~ A * d/dt B *edit* I think this is called Faraday's Law
But now the interesting part: the Magnetization M changes when the outer magnetfield changes. You can see this in the hysteris curve.
On "harder" magnets the hystersis is "flatter" at the region where H ~ 0.
What i mean M changes less when H changes less on "harder" magnets
=> B changes less => U changes less.
That means the voltage which causes the hum is less => less hum on harder magnets.
At the bottom you see the Magnetization M as a function of the Magntical Field H:
The Area in the curve is bigger the strong or harder (dunno how it's called) the magnet is. On very strong magnets it is like a square. That means the magnetization nearly
change in a magneticfield. On "softer" or wekaer magnets the curve is more round.
The magnetization does change in a magnetfield.
To sum it up: the Alnico 2 is softer than Alnico 5 and the Magnetization
changes more in a electromagnetical field which implicates a higher voltage which is inducated.
Sorry for my bad english! It's just a theory. You need the datas of the magnets to prove this....
Hope somebody understand a little bit...
ok i'll try to explain: why weaker magnets hum more then stronger
But it's just my theory
The noise from the windings is cancelled in first order of the humbucking effect. But if you have an electromagnetical field E (electrical field) and
H (magnetically) field are changning with time.
The changing of H causes a changing of B:
B=µ0 (H + M)
The changing of B causes a "voltage":
U = - d/dt (int_A B * dA) ~ A * d/dt B *edit* I think this is called Faraday's Law
But now the interesting part: the Magnetization M changes when the outer magnetfield changes. You can see this in the hysteris curve.
On "harder" magnets the hystersis is "flatter" at the region where H ~ 0.
What i mean M changes less when H changes less on "harder" magnets
=> B changes less => U changes less.
That means the voltage which causes the hum is less => less hum on harder magnets.
At the bottom you see the Magnetization M as a function of the Magntical Field H:
The Area in the curve is bigger the strong or harder (dunno how it's called) the magnet is. On very strong magnets it is like a square. That means the magnetization nearly
change in a magneticfield. On "softer" or wekaer magnets the curve is more round.
The magnetization does change in a magnetfield.
To sum it up: the Alnico 2 is softer than Alnico 5 and the Magnetization
changes more in a electromagnetical field which implicates a higher voltage which is inducated.
Sorry for my bad english! It's just a theory. You need the datas of the magnets to prove this....
Hope somebody understand a little bit...
Last edited:
bryvincent
New member
Re: seth seems more noisey than my other hummers
that's why slash always has a hush noise reduction in his set-ups.Biu said:
