[sdiy] High Q Resonators/analog drums

[Dave Manley]

Dan,

Take a look at the formulas here:

http://en.wikipedia.org/wiki/Inductor#Inductance_formulae

You can simplify all of these formulas down to L=k*(N^2), where k is some constant based on the size and materials involved.  The key thing regarding your question is that the inductance "L" in all of these formulas (except the one for a straight wire) is directly related to "N", the number of turns of wire (actually the square of the number of turns).   

So...the more turns, the more inductance.

Note that more turns also equals more resistance, which will increase the loss in the inductor and reduce the "Q".

-Dave


 On Tue 11/06/14  9:45 AM , "Dan Snazelle" subjectivity at hotmail.com sent:
> A gyrator could work for larger ones i think but i have no idea how to get
> gyrators to match specific values
> Plus then it would be high parts count!!
> 
> 
> Let me ask, bigger value inductors have More turns of wire or Less if you
> hand roll them??
> 
> Thnx
> 
> Sent from my iPhone
> 
> On Jun 14, 2011, at 12:03 PM, David Moylan <dave at westp
> hila.net> wrote:
> > There are some large ones.  32H I think for the
> Bass drum.  Smallbear stocks some Wilco axial inductors up to 1H.  Could be
> fun to play with.  I've built EQ with them but not this type of
> resonator.> 
> > Dave
> > 
> > 
> > On 6/14/11 7:44 AM, dan snazelle
> wrote:>> very interesting
> >> 
> >> my first question on inductor based
> "tanks" are these large inductors or small?>> 
> >> I would mess around with some of these mini
> drum circuits if I thought the inductors were small enough to order from
> Mouser>> 
> >> I always get confused by which size mH
> stands for (mill?)>> 
> >> 
> >> thanks for the info
> >> 
> >> 
> >> 
> >> 
> >> On Jun 14, 2011, at 8:40 AM, Chris Strellis
> wrote:>> 
> >>> Hi Adam,
> >>> 
> >>>> Some info on my page
> >>>> http://www.adambaby.com/studiotech_TR-77.html
> >>> 
> >>> That was fascinating to
> watch.>>> 
> >>> Thanks for doing that and for the
> link.>>> 
> >>> Now we need to model it in software
> ;)>>> 
> >>> Cheers
> >>> 
> >>> Chris
> >>> 
> >> 
> >>
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