Wah Inductors - Revision history

Zander at 02:30, 22 September 2026

2026-09-22T02:30:14Z

Zander at 16:11, 21 September 2026

2026-09-21T16:11:16Z

Zander: /* "Wedge" / RM-6 */

2026-09-21T06:14:27Z

‎"Wedge" / RM-6

Zander: /* Halo / 1811 */

2026-09-21T06:13:21Z

‎Halo / 1811

Zander: /* "Wedge" / RM-6 */

2026-09-09T04:26:20Z

‎"Wedge" / RM-6

Zander: /* Halo / 1811 */

2026-09-09T04:25:38Z

‎Halo / 1811

Zander: /* Stack of Dimes / 1408 */

2026-09-09T04:24:40Z

‎Stack of Dimes / 1408

Zander: /* Thermionic Inductors */

2026-09-09T04:21:57Z

‎Thermionic Inductors

Zander: /* Thermionic Inductors */

2026-09-08T16:14:02Z

‎Thermionic Inductors

Zander: /* Thermionic Inductors */

2026-09-08T16:03:26Z

‎Thermionic Inductors

@@ Line 50: / Line 50: @@
 | TDK || B65542B0000T001 || Coil Former
 |-
-| TDK || B65541T0250A048 || Ferrite Coil halves (0.10 mm gap) w/ threaded insert
+| TDK || B65541T0250A048 || Ferrite Core halves (0.10 mm gap) w/ threaded insert
 |-
 | Fair-Rite || 5678140921 || "Fair-Rite" branded Ferrite Coil - no insert - tight gap
@@ Line 66: / Line 66: @@
 | TDK || B65652B0000T001 || Coil Former
 |-
-| TDK || B65651D0000R048 || Ferrite Coil halves zero gap - sand paper to tune
+| TDK || B65651D0000R048 || Ferrite Core halves zero gap - sand paper to tune
 |-
-| TDK || B65651T0400A048 || Ferrite Coil halves (0.10 mm gap) w/ threaded insert
+| TDK || B65651T0400A048 || Ferrite Core halves (0.10 mm gap) w/ threaded insert
 |-
-| TDK || B65651T0250A048 || Ferrite Coil halves (0.20 mm gap) w/ threaded insert
+| TDK || B65651T0250A048 || Ferrite Core halves (0.20 mm gap) w/ threaded insert
 |-
 | Fair-Rite || 5695181221 || "Fair-Rite" branded Ferrite Coil - no insert - tight gap
@@ Line 86: / Line 86: @@
 | TDK || B65808N1004D001 || Coil Former with four lug pins
 |-
-| TDK || B65807J0400A048 || Ferrite Coil halves zero gap - sand paper to tune
+| TDK || B65807J0400A048 || Ferrite Core halves zero gap - sand paper to tune
 |-
-| TDK || B65807N0250A048 || Ferrite Coil halves (0.12 mm gap) w/ threaded insert
+| TDK || B65807N0250A048 || Ferrite Core halves (0.12 mm gap) w/ threaded insert
 |}

@@ Line 16: / Line 16: @@
 One morning, in the span of about 4 hours, Plunkett had built a new variation of the previously-mentioned tone control into a sweepable tone control.  After some experimentation in the office with this new control, it took on a life of its own.  An unused treadle housing for a foot-swept volume control organ pedal was repurposed, and the first ever wah-wah pedal was born.  Needless to say, this innovation captured the imagination of the people at Thomas Organ / Vox and it was released as a standalone product.  Jim Dunlop actually made a YouTube feature about the Crybaby wah-wah pedal that we love called [http://www.crybabydoc.com/index.html|"Crybaby: The Pedal That Rocked The World"].  It will also randomly pop up from time to time, without notice to YouTube, and will be similarly withdrawn from YouTube without notice.  The link provided may or may not work.
-== Thermionic Inductors ==
+== TS Inductors ==
 When most people think of an inductor as a component that gets wired into a wah-wah circuit, it's considered something of a black box.  You want a different sound in your wah-wah?  Replace your current inductor (the "Plain Jane Dunlop", for example) with another (the "Dunlop Red Fasel").  And this will change the sound.  And yet it might not get you the sound you're looking for...

@@ Line 84: / Line 84: @@
 | TDK || B65808B2203X000 || Clamp (harness), 1-piece (two needed!)
 |-
-| TDK || B65808N1004D001 || Coil Former with 4-pin Lug
+| TDK || B65808N1004D001 || Coil Former with four lug pins
 |-
 | TDK || B65807J0400A048 || Ferrite Coil halves zero gap - sand paper to tune

@@ Line 64: / Line 64: @@
 | TDK || B65655B0009X000 || Yoke (Harness) & 4-Lug Terminal Carrier
 |-
-| TDK || B65542B0000T001 || Coil Former
+| TDK || B65652B0000T001 || Coil Former
 |-
 | TDK || B65651D0000R048 || Ferrite Coil halves zero gap - sand paper to tune

@@ Line 78: / Line 78: @@
 {| class="wikitable" style="left; margin-right:20px; background-color:#eeffee;" cellpadding="10"
 |-
-! TDK Part Number || Inductor Assembly Piece
+! Manufacturer || Part Number || Inductor Assembly Piece
 |-
-| B65659F0001X023 || Inductance Tuning Screw
+| TDK || B65659F0001X023 || Inductance Tuning Screw
 |-
-| B65808B2203X000 || Clamp (harness), 1-piece (two needed!)
+| TDK || B65808B2203X000 || Clamp (harness), 1-piece (two needed!)
 |-
-| B65808N1004D001 || Coil Former with 4-pin Lug
+| TDK || B65808N1004D001 || Coil Former with 4-pin Lug
 |-
-| B65807J0400A048 || Ferrite Coil halves zero gap - sand paper to tune
+| TDK || B65807J0400A048 || Ferrite Coil halves zero gap - sand paper to tune
 |-
-| B65807N0250A048 || Ferrite Coil halves (0.12 mm gap) w/ threaded insert
+| TDK || B65807N0250A048 || Ferrite Coil halves (0.12 mm gap) w/ threaded insert
 |}

@@ Line 25: / Line 25: @@
 And that sent us down the wind-it-yourself inductor rabbit hole.
-We have spent multiple hours to try to understand what it takes to identify and assemble the correct pieces in order for someone to wind their own wah-wah inductors.  An inductor consists of top and bottom ferrite core halves, a coil former, yoke, assembly, and adjusting screw.  Not all inductors come with a screw.  The screw isn't to hold the inductor together, it serves to act as an insert to move up and down and adjust the gap between the two ferrite core halves.  A wah inductor needs a gap, as it is necessary for the inductance of the part.  If the gap is too small, the core will saturate and inductance will drop, and if the gap is too large, inductance is harder to create.  With non-toroidal inductors there seem to be only 3 types that go into wah-wahs.  "Stack of Dimes", "Halo", and the "ME-6".  Toroidal inductors include certain inductors from Dunlop, including red and yellow "Fasels".
+We have spent multiple hours to try to understand what it takes to identify and assemble the correct pieces in order for someone to wind their own wah-wah inductors.  An inductor consists of top and bottom ferrite core halves, a coil former, yoke, assembly, and adjusting screw.  Not all inductors come with a screw.  The screw isn't to hold the inductor together, it serves to act as an insert to move up and down and adjust the gap between the two ferrite core halves.  A wah inductor needs a gap, as it is necessary for the inductance of the part.  If the gap is too small, the core will saturate and inductance will drop, and if the gap is too large, inductance is harder to create.  With the coil-based, non-toroidal inductors that we're building there seem to be only 3 types that go into wah-wahs.  "Stack of Dimes", "Halo", and the "ME-6".  Toroidal inductors make up the preponderance of the inductors from Dunlop, including red and yellow "Fasels".
 So we're winding some of our own inductors.  We're going to wind each of the "flavors" of coil-based inductors.  Here's what our investigations lead to with respect to ordering the parts.  We found that Mouser seems to have the most breadth and depth of inductor parts.  So here are the components codes to look up the various pieces so as to be able to wind your own inductor.

@@ Line 34: / Line 34: @@
 <strong>HOWEVER</strong> Mouser doesn't always have all quantities of all components available at all times.  The components listed below were included because at the time this page was updated with the component information, these components were available as individual pieces and didn't require bulk (1000+ pieces) order.  Depending on when you're reading this entry, that information may be out of date and you may need to rummage through the Mouser site (or other sites like Digikey or RS-Online), so as to be able to order the correct parts in the appropriate quantities.
 </div>
 </blockquote>

@@ Line 33: / Line 33: @@
 <strong>NOTE</strong> The parts listed below will allow anyone to build their own inductor. The parts are grouped according to the inductor that one might wish to assemble.
-<strong>HOWEVER</strong> Mouser doesn't always have all quantities of all components available at all times.  The components listed below were included because at the time this page was updated with the component information, these components were available as individual pieces and didn't require bulk (1000+ pieces) order.  Depending on when you're reading this entry, that information may be out of date and you may need to rummage through the Mouser site (or other sites like Digikey or RS-Online), so as to be able to order the correct parts.
+<strong>HOWEVER</strong> Mouser doesn't always have all quantities of all components available at all times.  The components listed below were included because at the time this page was updated with the component information, these components were available as individual pieces and didn't require bulk (1000+ pieces) order.  Depending on when you're reading this entry, that information may be out of date and you may need to rummage through the Mouser site (or other sites like Digikey or RS-Online), so as to be able to order the correct parts in the appropriate quantities.
 </div>
 </blockquote>