Alnico5 Un-oriented Rough Vintage Alloy Bar Magnet (Long)

Just in....Vintage Formula un-oriented A5 mags....

A Vintage Formula Alnico 5 Unoriented (UOA5) magnet is one of the ultimate "secret weapons" for building or modding classic Gibson P.A.F. humbuckers. It breaks away from modern Alnico 5 standards to replicate a chemical and thermal anomaly frequently found in late-1950s guitar electronics.

The History: What Makes it "Unoriented"?

Standard modern Alnico 5 magnets are oriented (anisotropic). During the manufacturing process, the molten alloy (aluminum, nickel, cobalt, copper, and iron) is cooled inside a powerful magnetic field. This forces the internal grain structure to align perfectly in one direction. The result is a highly efficient magnet that holds a strong charge, delivering a tight, aggressive, and scoop-mid tone.

During the golden era at Gibson's Kalamazoo factory, however, consistency varied. Due to looser manufacturing controls or specific heat-treatment methods at old American foundries (like Illinois or Indiana), Gibson often received batches of unoriented (isotropic) Alnico 5. These magnets were cooled without a magnetic field, leaving the grain structure completely randomized. Consequently, the material cannot hold a full directional charge, physically altering how it behaves.

Tonal Profile: The Bridge Between Alnico 2 and Alnico 5

The unoriented Alnico 5 blends the best traits of two legendary magnets, making it highly musical and sought-after by pickup winders:

• From Alnico 2, it inherits: The sweet, rounded treble response (no harsh, piercing peaks), a singing mid-range bloom, and a soft, compressed transient attack when you dig in with a pick.

• From Alnico 5, it retains: Low-end clarity and definition. Where Alnico 2 can sometimes get "mushy" or boomy under heavy distortion, a UOA5 keeps the bass tight, articulate, and punchy.

Its frequency response is significantly warmer and richer in the upper-mids than a standard modern A5. It is an excellent choice for "taming" a bridge humbucker that sounds too bright or sterile, without losing its overall power and cutting edge.

Key Specs to Look For

If you are sourcing authentic "Vintage Formula" UOA5 bar magnets from specialized suppliers (such as Crazyparts), ensure they feature these historical details:

• Rough Cast Finish: The magnet should have a sand-cast, bumpy texture rather than a smooth, polished finish. The rough surface naturally scatters the magnetic field lines slightly.

• Traditional Dimensions: For the authentic late-50s "Long Magnet P.A.F." spec, look for the standard 2.5" length (2.5" x 0.5" x 0.125" / 63.5mm x 12.7mm x 3.2mm).

• Alloy Purity: Is the key to Vintage tone!