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Re: Hotter wind on screw coil

4/5/2006 6:22 PM
Hummer	Re: Hotter wind on screw coil David, Hum is not a function of the DCR, or even ACR. Hum is a function of a) coil geometry b) number of turns c) loading of conductive material The screw side and the slug side have very difference coil loading - matching the DCR is just not enough. Hence, assymetrical pickups such as Duncan JB's hum like hell, while symetrical designs like Larry Dim's stuff and Bill Lawrence are perfectly quiet. Even a quick search of the Duncan forum will comfirm Seymour's most ardent fans have noticed this. Winding a perfectly noiseless assymetrical bucker has become something of a lifetime goal for Seymour (although I think he's given up now!). thats why you see some JB models that have coils that are 10-15% apart in DCR. Often customers assume this is bad QC , but it is an attempt at hum-cancellation. Hope you get this now. My English is awful

4/5/2006 6:22 PM

Hummer

Re: Hotter wind on screw coil

David,

Hum is not a function of the DCR, or even ACR. Hum is a function of

a) coil geometry
b) number of turns
c) loading of conductive material

The screw side and the slug side have very difference coil loading - matching the DCR is just not enough.

Hence, assymetrical pickups such as Duncan JB's hum like hell, while symetrical designs like Larry Dim's stuff and Bill Lawrence are perfectly quiet. Even a quick search of the Duncan forum will comfirm Seymour's most ardent fans have noticed this.

Winding a perfectly noiseless assymetrical bucker has become something of a lifetime goal for Seymour (although I think he's given up now!). thats why you see some JB models that have coils that are 10-15% apart in DCR. Often customers assume this is bad QC , but it is an attempt at hum-cancellation.

Hope you get this now. My English is awful

Replies:

Luijo Last time I checked it was Larry Di... -- 4/6/2006 1:54 AM