HIGH QUALITY – CUSTOM PUTIIKKI PUTIIKKI is a Finnish word for boutique PICKUPS
100% SISU The Finnish spirit of resilience, determination, and inner strength — built to perform without compromise. GUARANTEED
Kuva 1 Kuva 2 Kuva 3 Kuva 4 Kuva 5 Kuva 6 Kuva 7 Kuva 8 Kuva 9 Kuva 10 Kuva 11 Kuva 12 Kuva 13 Kuva 14 Kuva 15 Kuva 16

WF072602-GL4ZR

GLACIER
HUMBUCKER
UNIT ID: WF072602-GL4ZR
BUILT: July 24, 2026

Sound Profile ?

Classic vintage output with exceptional dynamic response, articulate attack and effortless harmonic transparency.
Bass 6.5
Mids 6.8
Treble 7.8
Pickup Character

A beautifully balanced low-output humbucker with shimmering clarity, warm musical mids and an open vintage voice. The symmetrical coil design and AlNiCo 2 magnets deliver exceptional touch sensitivity, smooth harmonic bloom and outstanding note definition with effortless dynamic expression.

Electrical Profile ?

Core Parameters
In Series
DCR 11,6
Inductance 3,82 H
Capacitance 146 pF
North Coil
DCR 5,8
Inductance 2,07 H
Capacitance 148 pF
South Coil
DCR 5,8
Inductance 2,5 H
Capacitance 180 pF
"> Resonance Behavior
f₀ Peak Q
IN SERIES (Both Coils)
No Load 3,23 -33,63 1,9
500k 2,99 -36,05 1,6
250k 3,18 -37,38 1,4
North
No Load 4,38 -37,47 2,1
500k 4,35 -39,8 1,7
250k 4,56 -40,65 1,7
South
No Load 3,89 -37,47 2,2
500k 3,92 -39,05 1,5
250k 3,86 -40,51 1,7

Magnetic Field ?

North Coil
Polarity North UP
1. AlNiCo 2 bar - Slug (4,8mm X 12,5mm) 26 mT density
2. AlNiCo 2 bar - Slug (4,8mm X 12,5mm) 30 mT density
3. AlNiCo 2 bar - Slug (4,8mm X 12,5mm) 30 mT density
4. AlNiCo 2 bar - Slug (4,8mm X 12,5mm) 30 mT density
5. AlNiCo 2 bar - Slug (4,8mm X 12,5mm) 28 mT density
6. AlNiCo 2 bar - Slug (4,8mm X 12,5mm) 24 mT density
Spread 6 mT
(min 24 / max 30)
Strong Character
Magnet density (mT) describes the magnetic field strength at each pole and how the pickup interacts with the strings.

Different magnet types have different ranges (e.g. Alnico ~30–65 mT, Ceramic ~60–90+ mT), and some variation is normal — even within the same pickup.

Typical pole-to-pole variation is ~5–15 mT.

Spread describes this:
Lower spread → more even response
Higher spread → more character and dynamics

Slugs → smoother field
Screws → more focused response
South Coil
Polarity South UP
1. AlNiCo 2 bar - Slug (4,8mm X 12,5mm) 23mT mT density
2. AlNiCo 2 bar - Slug (4,8mm X 12,5mm) 25 mT density
3. AlNiCo 2 bar - Slug (4,8mm X 12,5mm) 26 mT density
4. AlNiCo 2 bar - Slug (4,8mm X 12,5mm) 27 mT density
5. AlNiCo 2 bar - Slug (4,8mm X 12,5mm) 27 mT density
6. AlNiCo 2 bar - Slug (4,8mm X 12,5mm) 21 mT density
Spread 6 mT
(min 21 / max 27)
Strong Character
Magnet density (mT) describes the magnetic field strength at each pole and how the pickup interacts with the strings.

Different magnet types have different ranges (e.g. Alnico ~30–65 mT, Ceramic ~60–90+ mT), and some variation is normal — even within the same pickup.

Typical pole-to-pole variation is ~5–15 mT.

Spread describes this:
Lower spread → more even response
Higher spread → more character and dynamics

Slugs → smoother field
Screws → more focused response

Winding ?

North Coil
1. Mixed 6200 turns
South Coil
1. Mixed 6200 turns
Total (Combined) 12400 turns
Wax Potting Light potting — balanced tone with reduced microphonic noise
The GLACIER is an exceptionally well-balanced vintage-output humbucker whose electrical characteristics point to a highly refined and musically expressive design. Both coils are wound to approximately 5.8 kΩ using an estimated 6200-turn SPN mixed winding, creating excellent electrical symmetry and consistent performance throughout the pickup. The South coil measures 2.50 H with a resonant frequency around 3.9 kHz, providing a warm, articulate foundation with excellent body and smooth transient response. The North coil, at 2.07 H and approximately 4.4 kHz, contributes additional openness, sparkle and upper-harmonic detail. Together in series, they produce 11.6 kΩ and 3.82 H, resulting in a remarkably balanced voice that blends warmth, clarity and dynamic articulation. The AlNiCo 2 bar magnet system generates an even magnetic field across both slug rows, with measured densities ranging from approximately 21–30 mT. This gentle and consistent magnetic pull promotes excellent sustain, natural string vibration and highly uniform note-to-note balance. The measured internal capacitance values (148–180 pF) indicate healthy winding geometry with stable resonant behavior under no-load, 250k and 500k conditions. Combined with light potting, the pickup retains outstanding openness, harmonic richness and touch sensitivity while maintaining excellent control. Overall, the GLACIER delivers an inspiring vintage humbucker experience with beautiful clarity, expressive dynamics and a remarkably refined harmonic character.
Pickup photo
Workshop Notes
ASA Bobbins • Baseplate silver/nickel (spacing 52mm) • Open frame (nickel) • Screws (#6-48 nickel) + springs included • Built using a combination of carefully selected reclaimed vintage pickup components and newly manufactured parts for optimal performance and consistency.

More posts