Conqueror fuzz inductor

[Harry Klippton]

Hey y'all as mentioned in this thread, I have a conqueror fuzz in my future. I saw that the parts list has a 500mH inductor, and yes I saw the threads about using the transformer that's half the cost of the cheap inductor from stompbox parts or whatever, but it just so happens I have a spare inductor laying around. It measured about 650mH. What effect, if any, will this have on the circuit?

 

[benny_profane]

You'll essentially shift change the frequency response by shifting the impedance of the L of the LC filter network up.

Inductor impedance: ZL = 2 x π x f x L

• Z (impedance) is in Ohms
• L is in Henries
• f is in Hz

Given 220Hz:

• At 500mH, the impedance is 691 Ohms
• At 650mH, the impedance is 898 Ohms

The filter network there is a bit more complicated than I can analyze right now, but you'll probably want to reference some resonant frequency resources to see how that will affect the circuit.

 

[Chuck D. Bones]

The inductor in the Conqueror is part of an LC filter. The resonant freq of an LC filter is:


The freq is inversely proportional to the square root of the inductance. This means that a 20% change in inductance results in a 10% change in freq.

Don't sweat the difference between 500mH and 650mH. In reality, most of the 500mH wah inductors are not all that close to 500mH.

Those cheap-ass transformers are ok for the Conqueror, but I would not use one in a Wah pedal because they are too lossy and will reduce the Q.